TWI825885B - Rod clamping device and sports equipment using the aforementioned rod clamping device - Google Patents

Abstract

The invention provides a rod clamping device, which includes a clamp body and a clamping mechanism. The clamp body has two opposite halves, forming a through space with an approximately circular cross-section therebetween for accommodating a cylindrical part of a rod. , the aforementioned pressing mechanism can bring the two opposite halves of the clamp body relatively close to each other, thereby clamping the cylindrical portion of the rod body; it is characterized in that: the two opposite halves of the clamp body each have a hole inside the through space. When the clamp body clamps the cylindrical part, the protrusions extending along the axial direction of the cylindrical part will basically only contact two opposite positions on the circumference of the cylindrical part. The present invention also provides a sports equipment using the aforementioned rod clamping device, which can be used, for example, to lock the angle of a handlebar.

Description

Rod clamping device and sports equipment using the aforementioned rod clamping device

The present invention relates to clamps, and more specifically, to a rod clamping device that can clamp a rod with a circular cross-section, and sports equipment using the aforementioned rod clamping device.

Rod clamping devices that can clamp rods with circular cross-sections are often used in daily life and many fields. Based on different design uses, some rod clamping devices will not be released after completion of clamping, while some rod clamping devices can be repeatedly clamped or loosened as needed to replace the rod (workpiece) or adjust its position. . For example, most ordinary bicycles use a rod clamping device commonly known as a "quick release clamp" to clamp the telescopic chair rod that supports the seat. When the user needs to adjust the height of the seat, the rod can be temporarily relaxed For the aforementioned chair rod, after raising or lowering the seat appropriately, re-clamp the chair rod. In the field of sports equipment, such as the stepless adjustment of seat height, grip angle, etc. of stationary bicycles, this type of rod clamping device may also be used.

Basically, the aforementioned rod clamping device includes a clamp body and a clamping mechanism. The clamp body roughly surrounds a cylindrical portion of the rod body. The clamping mechanism can bring the two opposite halves of the clamp body relatively close to each other to clamp the rod body. Tighten the aforementioned cylindrical part. In a typical prior art, the cylindrical part of the rod is accommodated in a through-space with an approximately circular cross-section in the clamp body. When the opposite halves of the clamp body are relatively close to each other, the inner wall of the through-space will be in close contact with each other. The circumferential surface of the aforementioned cylindrical part forms a large area of contact along the circumference. However, in terms of results, especially when the surface of the rod body (such as a metal rod) is smooth, this kind of clamping with the concave arc surface close to the convex arc surface The strength of the structure is not good, and relative sliding along the axial direction of the rod body or relative rotation around the axis of the rod body may occur when it bears a large external force. Some clamp bodies are equipped with an anti-slip rubber layer on the inner wall surface of the through space, but its effect is limited, and the rubber layer is easy to be damaged or fall off after repeated use.

In the prior art, in order to clamp the rod body more firmly, the two opposite halves of the main body of some clamps are two separate metal components, and each half has a cylindrical portion that fits the rod body. The inner wall of the aforementioned arc-shaped recess is covered with a plurality of integrally formed convex strips. The extension direction of each convex strip corresponds to the axial direction of the aforementioned cylindrical part. The cross-section is slightly triangular. The aforementioned arc-shaped recess The tips of all the convex ribs inside form an arc, the curvature of which roughly corresponds to the circumferential curvature of the aforementioned cylindrical part, and the convex ribs are densely arranged, and the distance between the tips of two adjacent convex ribs on the aforementioned arc is generally Less than 10 degrees, that is to say, there are more than dozens of convex strips surrounding the cylindrical part; in this way, when the two halves are relatively close to clamp the cylindrical part of the rod body, a plurality of convex strips are actually used The tip contacts (or even slightly penetrates) the circumferential surface of the aforementioned cylindrical part. By concentrating the clamping force on multiple straight lines on the arc surface, it has higher clamping strength than the arc surface contact method. . However, the structure of the clamp body is relatively complex. In practice, if the metal component is to be integrally formed into the convex strips, the casting precision is required to be high or the processing procedures are complex, resulting in high manufacturing costs.

The present invention aims to solve the above-mentioned problems of the prior art. Specifically, the main purpose of the present invention is to provide a rod clamping device that has good clamping strength and stability when clamping the rod.

Another object of the present invention is to provide a rod clamping device, which has a relatively simple structure, is relatively easy to manufacture, and has a low cost.

Another object of the present invention is to provide a sports equipment that has a specific rod body and a specific part that allows the user to adjust the relative position steplessly, and can firmly lock the relative position after the adjustment is completed.

In order to achieve the purpose of lifting up, the clamp body of the rod clamping device of the present invention has a first half and a second half opposite to each other (which may be two parts of the same component, or may be two separate components). ), the first half and the second half each have a recess with an approximately semicircular cross section and a notch facing the other side. The two recesses together form a through space with an approximately circular cross section for accommodating a rod. The cylindrical part; based on a possible implementation aspect of the present invention, the aforementioned rod clamping device also has the following characteristics: the aforementioned recesses of the aforementioned first half and the second half each have a groove along the aforementioned through space. A convex strip extending straight through the direction (corresponding to the axial direction of the cylindrical part of the rod body, hereinafter referred to as the axial direction of the rod body), and the convex strips of the first half and the convex strips of the second half are On opposite sides of the through space; when the first half and the second half of the clamp body are relatively close to clamp the cylindrical part of the rod body, the protrusion of the first half The strips and the convex strips of the second half remain in contact with the circumferential surface of the cylindrical portion at two opposite positions on the circumference (forming the first and second straight strip contact portions), and in addition to the convex strips, the recesses The inside of the cylindrical part does not contact the circumferential surface of the aforementioned cylindrical part, or, at most, it only contacts another position on the circumference of the aforementioned circumferential surface. For example, another position on the circumference of the aforementioned circumferential surface between the two opposite positions is against the aforementioned recess. Inner wall surface (forming the third straight strip contact part).

Through the top-up structure, the rod clamping device of the present invention can achieve the effect compared with the previous technology: for the cylindrical part of the rod with an adapted outer diameter, when the clamping mechanism is used to make the third part of the clamp body When the first half and the second half are relatively close to each other, the clamping force is concentrated from the opposite sides through the two convex strips parallel to the axial direction of the rod body and abuts the two opposite straight strips of the cylindrical part (at the same time, the aforementioned The cylindrical part may be abutted against the inner wall surface of the aforementioned recess by a third straight strip part), so it has good clamping strength and stability. In addition, the structure of the present invention is relatively simple and the cost is low.

Under the same inventive concept, based on another possible implementation aspect of the present invention, the rod clamping device of the present invention is characterized in that the aforementioned recess of the aforementioned first half has a penetration direction along the aforementioned penetration space. Two convex strips extending linearly, and the recess of the aforementioned second half also has two convex strips extending linearly along the penetration direction of the aforementioned through space, wherein one of the convex strips of the aforementioned first half and the aforementioned second One of the convex strips of the aforementioned half is located on two opposite sides of the aforementioned through-space, and the other convex strip of the aforementioned first half and the other convex strip of the aforementioned second half are located on the other two opposite sides of the aforementioned through-space, and , on the cross-section of the aforementioned through-space, the angle between the two connecting lines correspondingly formed by the two pairs of opposite convex strips is greater than 60 degrees; when the first half and the second half are relatively close to each other and clamp the aforementioned rod body In the cylindrical part, one of the convex strips of the aforementioned first half and one of the convex strips of the aforementioned second half remain in two opposite positions on the circumference of the circumferential surface of the aforementioned cylindrical part, and at the same time, the aforementioned first half The other convex strip and the other convex strip of the aforementioned second half remain in contact with two other opposite positions on the circumference of the circumferential surface of the aforementioned cylindrical part, and except for the aforementioned convex strip, the insides of the aforementioned two recesses do not contact the aforementioned The circumferential surface of a cylindrical part.

With the top-up structure, because the clamping force of the clamp body symmetrically abuts the circumferential four sides of the cylindrical part through two pairs of convex strips parallel to the axial direction of the rod body, it has good clamping strength and stability. In addition, the structure of the present invention is relatively simple and the cost is low.

Preferably, the aforementioned convex strips in the present invention can be formed by embedding, which is relatively easy to manufacture and low in cost. For example, each of the aforementioned recesses has a groove extending along the aforementioned penetration direction. The aforementioned embedding grooves form a notch extending along the aforementioned penetration direction on the inner wall surface of the aforementioned recess. Each of the aforementioned embedding grooves is embedded with an embedding rod, and a part of the aforementioned embedding rod protrudes from the aforementioned notch to the aforementioned embedding rod. Through the space, the aforementioned convex strips are formed.

Furthermore, considering that metal round rods (referring to metal rods with circular cross-sections) are easily available commercial products with various specifications, the aforementioned embedded rods are made of metal round rods, and the aforementioned embedded groove is formed from one end of the aforementioned recess. Extending toward the other end, for example, drilling holes along the through direction, allowing the inlay rod to be embedded along the long axis. The production is relatively easy and the cost is low.

Furthermore, according to a preferred embodiment of the present invention, the first half and the second half each have two side plates facing each other in the penetration direction, and the recess and the embedded groove of each half are along the The penetration direction penetrates the two side plates, and the opposite ends of the embedded rod are respectively supported by the two side plates; this structure can reduce the volume of the first half and the second half, save materials and lower costs.

Including but not limited to possible implementations of the above-mentioned lift, preferably, the height of the protruding strips from the inner wall surface of the recess is less than 5% of the radius of the cylindrical part of the rod body.

Including but not limited to the possible embodiments of the upward lifting, preferably, the outer edge of the cross-section of the aforementioned convex strip is arc-shaped.

Including but not limited to the possible embodiments of the above-mentioned lifting, preferably, the surface of the aforementioned convex strips has concave and convex textures for increasing friction.

In response to one of the above-mentioned purposes of the present invention, the sports equipment provided by the present invention has a specific pole body and a specific part that allow the user to adjust the relative position steplessly. It is characterized by including the aforementioned pole clamping device. The rod clamping device is arranged at the aforementioned specific position, and uses the aforementioned through space to accommodate a cylindrical portion of the aforementioned specific rod; the aforementioned pressing mechanism can be repeatedly operated by the user to make the first half and the second half of the aforementioned clamp body The half parts are relatively close to or far away from each other, thereby clamping or relaxing the cylindrical part of the aforementioned specific rod body, so that when the aforementioned clamp body relaxes the aforementioned cylindrical part, the relative position of the aforementioned specific rod body and the aforementioned specific part can be changed, and in the aforementioned clamp When the main body clamps the cylindrical part, the relative position of the specific rod body and the specific part is locked. By virtue of the ability of the rod clamping device, the relative position of the specific rod and the specific part can be firmly locked in the clamped state.

According to a preferred embodiment of the present invention, the above-mentioned specific rod body is the handlebar of the above-mentioned sports equipment, and has a cross-bar portion and two gripping portions respectively connected to two opposite ends of the aforementioned cross-bar portion. A partial section of the crossbar portion forms the cylindrical portion; when the user uses the sports equipment to exercise, the clamp main body clamps the cylindrical portion of the crossbar portion so that the user can grasp the fixed cylindrical portion. Two gripping parts; when the clamp body relaxes the cylindrical part, the handle rod can rotate within a predetermined angle range with the axis of the cylindrical part as the rotation axis to change the position of the two gripping parts.

[First preferred embodiment] (Figures 1~8)

10: Pillars

11:Mounting seat

12:Cantilever

13: Encasing

20: handlebar

21: Crossbar part

211: Cylindrical part

22: Grip part

23: slot

30: Rod body clamping device

31: Clamp body

32: Through space

40:First half

41:First notch

42: First convex strip

421: convex surface

422:Groove

43:First shaft hole

44:Screw hole

45: Pin hole

50:Second half

51:Second notch

52: Second convex strip

521: convex surface

522: Groove

53:Second shaft hole

54: Gap

60:Long bolt

61: Nut

70: Elastic operating parts

71: Straight rod

72:Screw

73:Rotating handle

74: Washer

80:Protruding pin

A:Axis

A1: first axis

A2: Second axis

[Second preferred embodiment] (Figures 9~12)

230: Rod clamping device

232: Through space

240:First half

241:First notch

242: First convex strip

243:First shaft hole

244:Through hole

246:First slot

247:Slot

248:First embedded rod

250:The second half

251:Second notch

252: Second convex strip

253:Second shaft hole

254:Gap

256:Second slot

257:Slot

258:Second embedded rod

260:Long bolt

261: Nut

270: Elastic operating parts

274: Washer

275: Nut

276: Washer

[Third preferred embodiment] (Figures 13~15)

330: Rod clamping device

340:First half

341:First notch

342: First convex strip

343:First shaft hole

344:Through hole

346:First slot

347:Slot

348:First embedded rod

349:First side panel

350:Second half

351:Second notch

352: Second convex strip

353:Second shaft hole

354: Gap

356:Second slot

357:Slot

358:Second embedded rod

359:Second side panel

360:Long bolt

361: Nut

365:Connection block

366: Intermediate shaft hole

370: Elastic operating parts

374: Washer

375: Nut

376: Washer

[Fourth preferred embodiment] (Fig. 16)

430: Rod clamping device

440:First half

441:First notch

442: First convex strip

442’: The third convex strip

448: embedded rod

450:The second half

451:Second notch

452: Second convex strip

452’: The fourth convex strip

458: embedded rod

[Fifth preferred embodiment] (Fig. 17)

530: Rod clamping device

531: Clamp body

532: Through space

540:First half

541:First notch

542: First convex strip

550:The second half

551:Second notch

552: Second convex strip

570: Elastic operating parts

571: Cam part

572:Trigger part

573:Screw

574:Cushion block

575: Nut

576: torsion axis

Several possible implementations and applications of the present invention will be described in detail below with reference to the accompanying drawings, among which:

Figure 1 is a perspective view of the vicinity of the handle bar of the sports equipment to which the first preferred embodiment of the present invention is applied.

FIG. 2 is a longitudinal sectional view of the sports equipment in FIG. 1 near the handle bar.

Figure 3 is a perspective view of the first preferred embodiment of the present invention.

Figure 4 is a perspective view of the first half of the clamp body in the first preferred embodiment of the present invention.

Figure 5 is a perspective view of the second half of the clamp body in the first preferred embodiment of the present invention.

FIG. 6 is a cross-sectional view along line VI-VI in FIG. 3 .

FIG. 7 is an enlarged view of the vicinity of the first convex strip in FIG. 6 .

FIG. 8 is an enlarged view of the vicinity of the second convex strip in FIG. 6 .

Figure 9 is a perspective view of the second preferred embodiment of the present invention.

Figure 10 is a perspective view of the first half of the clamp body in the second preferred embodiment of the present invention.

Figure 11 is a longitudinal sectional view of the second preferred embodiment of the present invention.

FIG. 12 is an enlarged view of the vicinity of the first convex strip in FIG. 11 .

Figure 13 is a perspective view of the third preferred embodiment of the present invention.

Figure 14 is a perspective view of the first half of the clamp body in the third preferred embodiment of the present invention.

Figure 15 is a longitudinal sectional view of the third preferred embodiment of the present invention.

Figure 16 is a longitudinal sectional view of the fourth preferred embodiment of the present invention.

Figure 17 is a front view of the fifth preferred embodiment of the present invention.

The rod clamping device provided by the present invention can be used in daily life and various fields. Where in the domain it is necessary to clamp a rod body with a circular cross-section, the clamping handle bar in sports equipment is used as a representative example for detailed explanation.

Please refer to Figures 1 and 2, which are respectively a perspective view and a longitudinal cross-sectional view near the handle bar of a sports equipment using the first preferred embodiment of the present invention (pole clamping device). The sports equipment may be a stationary bicycle, an elliptical bicycle, or an elliptical bicycle. Exercise machines, steppers, etc. mainly allow users to move their feet, and their hands can grasp fixed handlebars during exercise. However, the mode of movement is not directly related to the application of the present invention, Figure 1 and Figure 2 Only part of the front end of the aforementioned sports equipment is shown. As shown in the figure, the front end of the aforementioned sports equipment has a column 10, and its top has a mounting base 11 for installing a console (not shown in the figure). A rearwardly extending cantilever 12 is fixed (for example, welded) to the appropriate height position of the top end. The rod clamping device 30 of this preferred embodiment is provided at the rear end of the cantilever 12 for clamping a cantilever 12 that can be grasped by the user. The handle bar 20. The aforementioned rod clamping device 30 mainly includes a clamp body 31 and an elastic operating member 70. The clamp body 31 and the cantilever 12 are covered by a shell 13 for both protection and decoration. Only the elastic operating member 70 is partially covered. Exposed at the rear of the casing 13 . The aforementioned handle bar 20 is basically formed by bending a metal tube with a circular cross-section (hereinafter referred to as a metal round tube), and has a cross bar extending along the left and right axial directions of the sports equipment and penetrating the casing 13 and the clamp body 31 21, and two gripping portions 22 extending substantially forward and upward from the left and right ends of the crossbar portion 21, wherein the center of the length of the crossbar portion 21 is positioned behind the cantilever 12, and the two gripping portions 22 extend forward and upward respectively. 22 are symmetrically positioned on the left and right sides of the upright column 10 and can be grasped by both hands of users who use the aforementioned sports equipment to perform specific movements (for example, pedaling movements with their legs) to maintain the stability of the upper body and help the lower body to exert force.

Users sometimes need to adjust the positions of the two gripping parts 22 to suit their body shape, habits, sports postures, etc. As will be described in detail later, the user can repeatedly operate the rod clamping device 30 to clamp or loosen the handle rod 20. When the operation is in the relaxed state, the entire handle rod 20 can be aligned with the axis A of the crossbar portion 21. As the rotation axis rotates within a predetermined angle range, for example, between the position shown by the solid line and the position shown by the imaginary line in FIGS. 1 and 2 , the grip 22 is changed relative to the aforementioned axis A or relative to the aforementioned axis A. The position of the cantilever 12 (specifically reflected in the change of the height of the gripping part 22 and the angle of the long axis) is adjusted to the appropriate position and then operated into the clamping state to re-lock the handlebar 20.

Next, the structure, operation and function of the rod clamping device 30 of this preferred embodiment will be described. Please refer to Figure 3 first. The aforementioned clamp body 31 has a first axial direction A1 and a second axial direction A1. A2, a first half 40 and a second half 50. The aforementioned first axial direction A1 is parallel to the axis A of the crossbar portion 21 of the handle bar 20, that is, corresponds to the left and right axial directions of the sports equipment; the aforementioned second axial direction A2 is perpendicular to the first axial direction A1, which in this example corresponds to On the front and back axis of sports equipment. The first half 40 and the second half 50 of the clamp body 31 are two separate metal members and are arranged to face each other in the second axial direction A2. Specifically, the first half 40 faces the front and the second half 50 faces the front. The half part 50 is opposite to the rear, and the two parts 40 and 50 are close to each other and their left and right widths are roughly aligned.

Please refer to FIGS. 4 to 6 again. The top of the first half 40 has a first shaft hole 43 penetrating along the first axial direction A1. The top of the second half 50 has a first axis hole 43 extending along the first axial direction A1. The second shaft hole 53 passes through and matches the aforementioned first shaft hole 43; a long bolt 60 penetrates the first half 40 and the second half 50 from the right side through the first shaft hole 43 and the second shaft hole 53, and the tail The end passes through the left side and is screwed into a nut 61, whereby the first half 40 and the second half 50 are pivoted to each other at their respective tops, and can rotate relative to each other with the long bolt 60 as the rotation axis, so that the two halves can rotate relative to each other. 40 and 50 are relatively close or far away. In this example, the first half 40 is fixed (for example, welded) to the rear end of the aforementioned cantilever 12 , that is to say, the first half 40 is actually fixed, while the second half 50 can rotate toward the rear end. forward toward or backward away from the first half 40 .

There is a first recess 41 extending along the first axis A1 between the top and the bottom of the first half 40 and having an approximately semicircular cross-section. The notch of the first recess 41 faces rearward, that is, toward the third Two halves 50; roughly symmetrically, there is a second recess 51 extending along the first axial direction A1 and having an approximately semicircular cross-section between the top and bottom of the second half 50. The second recess 51 is The notch faces forward, ie towards the first half 40 . As shown in FIGS. 3 and 6 , the first recess 41 of the first half 40 and the second recess 51 of the second half 50 together form a penetration along the first axial direction A1 and with a substantially circular cross-section. Space 32; the cross bar portion 21 of the handle bar 20 penetrates the clamp body 31 through the through space 32. In other words, the central portion (cylindrical in appearance, hereinafter referred to as the cylindrical portion) 211 of the cross bar portion 21 is accommodated in the through space 32. , the axial direction of the aforementioned cylindrical portion 211 (hereinafter also referred to as the rod axis direction) is parallel to the penetrating direction of the penetrating space 32 . In the cross-section of the through space 32, the inner wall surfaces of the first recess 41 and the second recess 51 each roughly form an arc with an arc of about 180 degrees, and its curvature is slightly smaller than the circumferential curvature of the aforementioned cylindrical portion 211. Specifically, the radius of the aforementioned arc of each recess 41, 51 is only less than 5% larger than the radius of the cylindrical portion 211. As mentioned before, the handle bar 20 is basically formed by bending a metal circular tube. Furthermore, except for the aforementioned cylindrical portion 211 in the central section of the cross bar portion 21, the other surfaces of the handle bar 20 are covered with Covered with a layer of rubber or plastic, in other words, only the circumferential surface of the aforementioned cylindrical portion 211 is a metal surface, and the outer diameter of this portion is smaller than the outer diameter of other portions of the handlebar 20 .

A first protruding strip 42 is integrally formed in the first recess 41 of the first half 40 . The first protruding strip 42 is formed along the first axial direction A1 on the inner wall surface of the first recess 41 from the first recess 41 One end of the second half 50 extends completely to the other end; a second convex strip 52 is integrally formed in the second recess 51 of the second half 50, and the aforementioned second convex strip 52 is along the first inner wall of the second recess 51. The axial direction A1 completely extends from one end of the second recess 51 to the other end. In this example, the first convex strip 42 of the first half 40 is located near the bottom inside the first recess 41 and occupies approximately 10 degrees of the arc-shaped inner wall surface of the first recess 41; relatively speaking, , the second convex strip 52 of the second half 50 is located near the top position inside the second recess 51 and occupies approximately 10 degrees of the arc-shaped inner wall surface of the second recess 51 . As shown in FIG. 6 , the first convex strip 42 and the second convex strip 52 are located on opposite sides of the aforementioned through space 32 (for example, approximately 7 o'clock position and approximately 1 o'clock position in FIG. 6 ). Of course, the relative position of the first convex strip and the second convex strip in the present invention is not limited to the above-mentioned orientation. For example, the first convex strip and the second convex strip may face each other front and back in the second axial direction A2. As shown in FIGS. 7 and 8 , the cross-sectional outer edges of the first convex strip 42 and the second convex strip 52 are both arc-shaped (ignore the grooves 422 and 522 on the surface, which will be described later), and are only slightly raised. Specifically, the height of the first protrusion 42 protruding from the inner wall surface of the first recess 41 and the height of the second protrusion 52 protruding from the inner wall surface of the second recess 51 are both smaller than the aforementioned cylindrical portion 211 5% of the radius.

The bottom of the first half 40 has a screw hole 44 penetrating along the second axial direction A2, and the bottom of the second half 50 has a notch penetrating along the second axial direction A2 and substantially matching the screw hole 44. 54. The aforementioned elastic operating member 70 has a coaxially connected straight rod 71 and a screw 72. The outer diameter of the straight rod 71 is larger than the outer diameter of the screw 72, so that an annular shoulder (not numbered) is formed at the boundary; the screw of the elastic operating member 70 72 passes through the notch 54 of the second half 50 from back to front and then penetrates into the screw hole 44 of the first half 40 to form a screw connection, and the aforementioned annular shoulder surface of the front end of the straight rod 71 contacts the second half through a washer 74 around the rear end of the notch 54 of the half 50; a distance is maintained between the bottom of the second half 50 and the bottom of the first half 40, so that the bottom side of the aforementioned through space 32 has an opening; the straight rod of the elastic operating member 70 The rear half of 71 protrudes backward from the aforementioned cladding 13, and is connected to a rotating handle 73 at the rear end. The above structure constitutes a pressing mechanism of the rod clamping device 30 that can be operated repeatedly by the user. According to the operation, the first half 40 and the second half 50 of the clamp body 31 can be relatively close to or away from each other, thereby clamping or Loosen the cylindrical portion 211 of the crossbar portion 21 therebetween.

Specifically, when the user rotates the rotating handle 73 at the rear end of the elastic operating member 70 (usually in a clockwise direction) to make the screw rod 72 at the front end advance in the screw hole 44 of the first half 40, the middle part of the elastic operating member 70 The annular shoulder surface will push forward against the bottom end of the second half 50, causing the second half 50 to rotate forward relative to the first half 40 with the long bolt 60 at the top as the rotation axis, resulting in a through-space. The opening on the bottom side of 32 is narrowed, so that the inner wall surface of the first recess 41 in the front is relatively close to the inner wall surface of the second recess 51 in the rear, thus encompassing the aforementioned cylindrical portion 211 accommodated in the through space 32 . If the user exerts force to tighten the elastic operating member 70 forward, the first half 40 and the second half 50 of the clamp body 31 will clamp the cylindrical portion 211 to lock the handle bar 20 . As shown in Figures 6, 7, and 8, in the clamping state, the first protruding strip 42 inside the first recess 41 and the second protruding strip 52 inside the second recess 51 remain in contact with the circumference of the cylindrical portion 211 There are two opposite positions on the circumference of the surface (for example, about 7 o'clock and about 1 o'clock in Figure 6), and in addition to the aforementioned first and second ridges 42 and 52, the aforementioned first and second recesses 41 The inside of , 51 does not contact the circumferential surface of the cylindrical portion 211, or, at most, it only contacts another position on the circumference of the aforementioned circumferential surface.

To expand, the conditions during each clamping may be slightly different. Sometimes the circumferential surface of the aforementioned cylindrical part 211 only contacts the first convex strip 42 and the second convex strip 52 (forming the first and second straight strips). contact part), while other parts of the aforementioned circumferential surface maintain a slight gap with the arc-shaped inner wall surfaces of the first peripheral recess 41 and the second recess 51, and the radial distance is less than 5% of the radius of the cylindrical part 211 on average. %; Or, not shown in the figure, sometimes another position on the circumference of the aforementioned circumferential surface will contact the inner wall surface of the first recess 41 or the second recess 51 (forming a third straight strip contact part). Viewed in cross section Like the arc inscribed between the aforementioned circumferential surface and the aforementioned inner wall surface, based on the upward-exposed structure, it may be the front edge of the aforementioned circumferential surface (for example, about 10 o'clock in Figure 6, that is, the aforementioned first and second straight strip contacts The position in the middle of the contact part) contacts the inner wall surface of the first recess 41, or it may be the rear edge of the aforementioned circumferential surface (for example, the approximately 4 o'clock position in Figure 6, that is, the position between the first and second straight strip-shaped contact parts). position) contacts the inner wall surface of the second recess 51 . The reason for the above different results is that during the clamping process, when the opposite first convex strip 42 and the second convex strip 52 have touched the circumferential surface of the cylindrical part 211 and continue to be tightened, according to the cylindrical part 211 The relative position of 211 at that time may be directly clamped or even clamped by the two convex bars 42 and 52 from the opposite sides. In the end, only two points on the circumference are in contact. In another situation, the cylindrical part 211 will move toward the two convex bars. The sides in the clamping direction of 42 and 52 are slightly offset, and the third position on the circumference is against the inner wall surface of the through space 32. Finally, there are three points of contact on the circumference.

In the clamped state, if the user loosens the elastic operating member 70 backward, the first half 40 and the second half 50 of the clamp body 31 (at least on a microscopic scale) will move away from each other relatively, causing the first convex strip to 42 and the second protruding strip 52 do not press against the circumferential surface of the aforementioned cylindrical portion 211 at the same time, that is, the clamping force on the cylindrical portion 211 is temporarily relaxed, allowing it to rotate in situ in the through space 32 . Therefore, when the user needs to adjust the position of the grip portion 22, he can first grasp the grip portion 22 on one side with one hand, then use the other hand to loosen the elastic operating member 70 appropriately, and then grasp the grip portion 22 with the other hand. 22 hands to rotate the entire handle lever 20 with the axis A of the crossbar portion 21 as the rotation axis (as shown in Figure 1), rotate to the appropriate position and then tighten the elastic operating member 70 to re-lock the handle lever 20, if necessary The above-mentioned loosening, turning and clamping (and then trial) can be performed repeatedly to adjust the grip 22 to the most appropriate position.

As shown in Figure 6, a pin hole 45 (see Figure 4) is provided in the center of the first recess 41 of the first half 40. A protruding pin 80 is inserted into the pin hole 45 and is fixed. The rear end of the protruding pin 80 It protrudes from the aforementioned through space 32 and extends into a slot 23 preset at a corresponding position of the aforementioned cylindrical portion 211. The opening of the aforementioned slot 23 is elongated, and its length extends along a predetermined arc along the circumference of the cylindrical portion 211. , and the width (in the left and right axial directions) corresponds to the outer diameter of the protruding pin 80, so that the protruding pin 80 can be relatively displaced along the length of the slot hole 23, but cannot be relatively displaced across the width of the slot hole 23, whereby the handle The rotation of the rod 20 around the aforementioned axis A is limited to a predetermined angle range (corresponding to a reasonable adjustment range of the position of the grip portion 22), and the crossbar portion 21 of the handle rod 20 cannot displace left or right along its own axis. Of course, the structure used to limit the rotation angle and axial displacement of the handle bar 20 does not have to be provided in the through space 32 of the clamp body 31. For example, it can be changed to be between the left and right sides of the clamp body 31 and the cross bar portion 21. Parts that can catch each other are set at corresponding positions.

As shown in FIGS. 7 and 8 , the cross-sectional outer edges of the first protrusion 42 and the second protrusion 52 are both arc-shaped, which facilitates contacting any position on the circumference of the aforementioned cylindrical portion 211 . Depending on the magnitude of the clamping force and the relative hardness of the cylindrical part 211, in the clamped state, each protrusion 42, 52 may contact the cylinder with approximately one-third to two-thirds of its surface 421, 521. The circumferential surface of the shaped part 211. In this preferred embodiment, the surfaces 421 and 521 of the first convex strip 42 and the second convex strip 52 both have concave and convex textures, such as a number of grooves extending along the long axis of the convex strips 42 and 52 as shown in the figure. 422, 522 are used to increase the friction between the convex surface 421, 521 and the circumferential surface of the cylindrical part 211, which can further improve the clamping strength. Having said that, the present invention is not limited to the structure of the above-mentioned preferred embodiment. In other possible implementations, the cross-section of the aforementioned convex strips is, for example, trapezoidal. Other shapes, or the surface of the aforementioned convex strips has no concave and convex texture.

Through the top-up structure of the rod clamping device 30 of the present invention, for the cylindrical part 211 of the rod with an adapted outer diameter, the first half 40 and the second half of the clamp body 31 are pressed by the aforementioned pressing mechanism. 50 is relatively close, because the clamping force is concentrated from the opposite sides through the first convex strip 42 and the second convex strip 52 parallel to the axial direction of the rod body, and contacts the two opposite straight strip parts of the aforementioned cylindrical part 211 (at the same time, The aforementioned cylindrical portion 211 may have a third straight strip portion against the inner wall surface of the aforementioned first recess 41 or the second recess 51), so it has good clamping strength and stability and will not withstand large external forces. Easily displaced. In addition, compared with the prior art of integrally forming a plurality of convex strips on the inner wall surface of the arc-shaped recess, the structure of the present invention is relatively simple and the cost is low.

The rod clamping device of the present invention can be applied in various places where it is necessary to clamp a rod with a circular cross-section, such as a specific rod in the sports equipment as exemplified above that allows the user to adjust the relative position steplessly (such as Between the aforementioned handle bar 20) and a specific part (such as the aforementioned cantilever 12). From another perspective, the present invention also provides an improved sports equipment, which is characterized in that the aforementioned rod clamping device is applied between a specific rod body that can adjust the relative position and a specific part. It must be added that the so-called adjustment of the relative position is not limited to (for example, the above example) where the specific part is fixed and the position of the specific rod is adjustable. It may also be that the specific rod is fixed and the position of the specific part is adjustable. Adjustment, for example, the aforementioned specific rod body and specific part are respectively a fixed guide rod and an adjustable sliding seat. The aforementioned sliding seat is provided with a rod body clamping device that clamps the aforementioned guide rod. The aforementioned rod When the body clamping device is relaxed, the sliding seat can slide along the guide rod to change position. When the aforementioned rod body clamping device is clamped, the sliding seat will be locked in the current position. In short, through the ability of the aforementioned rod clamping device, the relative position of the aforementioned specific rod and the aforementioned specific part can be firmly locked in the clamped state, preventing relative rotation around the axis of the rod or relative movement along the axial direction of the rod. Sliding condition.

Several possible implementations of the rod clamping device of the present invention will be described below with examples. Various structures can be applied in a similar manner to, for example, clamping handlebars in sports equipment, and the description will not be repeated. In addition, the following description of each embodiment will focus on structural differences and functional features. On the contrary, the same or similar parts may be briefly or omitted from description.

Please refer to Figures 9 to 12. In the rod clamping device 230 of the second preferred embodiment of the present invention, the first half 240 and the second half 250 of the clamp body are also two separate metal components, and, The first half 240 and the second half 250 also utilize a first shaft penetrating the tops of both. The hole 243 and a long bolt 260 of the second shaft hole 253 (the tail end of which is screwed into a nut 261) form a pivot connection, which can be relatively close to or away from each other in a rotational manner; still the same, the first half 240 has a cross-section approximately The first semicircular recess 241 and the second half 250 have a second recess 251 with an approximately semicircular cross section. The first recess 241 and the second recess 251 together form a through space with an approximately circular cross section. 232, used to accommodate the cylindrical part of a rod; the tightening mechanism in this embodiment is slightly different. The elastic operating member 270 is essentially a long bolt, which passes through the notch 254 at the bottom of the second half 250 and the third In the through hole 244 at the bottom of the half part 240, the head of the bolt contacts the outer surface of the second half 250 through a washer 274, and the tail end of the bolt is screwed into a nut 275 and contacts the first half 240 through a washer 276. On the outside, by using a wrench if necessary, the elastic operating member 270 and the nut 275 are relatively rotated, that is, by changing the distance between the nut 275 and the bolt head, the first half 240 and the second half can be changed. The distance between the bottom of 250 makes the two 240 and 250 relatively close or far apart. When the first half 240 and the second half 250 of the clamp body clamp the aforementioned cylindrical portion, the first convex bar 242 and the second convex bar 252 located on opposite sides of the through space 232 also contact the aforementioned cylindrical portion. Two relative positions on the circumference of the part.

Compared with the previous embodiment, the more important structural difference of the rod clamping device 230 of this preferred embodiment is the aforementioned first protrusion 242 in the first recess 241 of the first half 240, and The aforementioned second protrusions 252 in the second recess 251 of the second half 250 are formed by embedding. Specifically, the first recess 241 of the first half 240 has a first insert groove 246 extending along the penetration direction of the through space 232 (corresponding to the axial direction of the rod body). The first insert groove 246 is in A notch 247 extending along the aforementioned penetration direction is formed on the inner wall surface of the first recess 241; a first embedded rod 248 is embedded in the first embedded groove 246, and part of the first embedded rod 248 is formed by the first embedded groove. The notch 247 of 246 protrudes into the through space 232 to form the aforementioned first protrusion 242; similarly, the second recess 251 of the second half 250 has a second embedded groove 256 extending along the aforementioned through direction. The aforementioned second embedding groove 256 forms a notch 257 extending along the aforementioned penetration direction on the inner wall surface of the second recess 251; a second embedding rod 258 is embedded in the second embedding groove 256, and the second inlay rod 258 The portion protrudes from the notch 257 of the second embedding groove 256 to the through space 232 to form the aforementioned second protruding strip 252 .

More specifically, the cross-sections of the aforementioned embedded rods 248 and 258 are circular (ignore the uneven texture on the surface, which will be described later), and the cross-sections of the aforementioned embedded grooves 246 and 256 are approximately circular (like a circle with a small corner shaved off, and the shaved position forms a The width of the aforementioned slots 247 and 257 is significantly smaller than the diameter of the circle), in which the first inlay groove 246 runs from one end of the first recess 241 to the other end along the aforementioned penetration direction. Extending (in this example, through to the other end, the same below), the second caulking groove 256 extends from one end of the second recess 251 to the other end along the aforementioned penetration direction. In practical production, the aforementioned caulking grooves 246 and 256 can It is simply formed by drilling holes along the aforementioned penetration direction, with the hole diameter corresponding to the outer diameter of the inlay rods 248 and 258, so that the inlay rods can be embedded along the long axis and form a tight fit. As shown in Figure 12 (taking the first inlay rod 248 embedded in the first inlay groove 246 as an example, the second inlay rod 256 and the second inlay rod 258 on the other side have the same structure), because the inlay rods 248 and 258 The cross-section is circular, and the outer edge of the cross-section of the part (as the protrusions 242, 252) that is embedded in the slots 246, 256 in any direction and protrudes from the slots 247, 257 to the through space 232 must be arc-shaped, and the shape is the same. In the previous embodiment; not only that, based on the preset component dimensions, the protrusions 242 and 252 formed by the parts of the embedded rods 248 and 258 protruding into the through space 232 in this embodiment include the protrusion height, outer surface Various parameters such as edge curvature, size ratio to the aforementioned recess, and size ratio to the aforementioned cylindrical portion can be the same as the convex strips integrally formed in the recess in the previous embodiment.

In practice, the aforementioned inlaid rods 248 and 258 can be metal round rods with concave and convex patterns on the surface (such as straight lines or mesh patterns). Such metal round rods are easily available commercially and come in various specifications. In addition to increasing the friction between the protrusions 242 and 252 and the cylindrical portion, the concave and convex textures also contribute to the tight fit of the inlay rods 248 and 258 in the inlay grooves 246 and 256 . Having said that, the present invention is not limited to the structure of the above-mentioned preferred embodiment. In other possible implementations, the cross-sections of the aforementioned embedded rods and embedded grooves are other shapes such as trapezoids, or the aforementioned embedded rods (convex strips) ) has no uneven texture on its surface.

Generally speaking, compared with the method of integrally molding metal components, forming the aforementioned convex strips by inserting them (especially using ready-made metal round rods embedded in embedded grooves formed by drilling holes) is relatively easy to produce and the cost is lower.

Next, please refer to Figures 13 to 15. In the rod clamping device 330 of the third preferred embodiment of the present invention, the first half 340 and the second half 350 of the clamp body are also two separate metal components. However, unlike the metal blocks in the first and second embodiments, this embodiment is formed by bending a metal plate. The first half 340 and the second half 350 respectively have a through direction (corresponding to The two first side plates 349 and the two second side plates 359 that are opposite to each other in the axial direction of the rod body, or from another perspective, can also be regarded as the two ends of the first half 340 and the second half 350 in the aforementioned penetration direction. The part in between is hollowed out; the first half 340 has a first recess 341, a first insert groove 346 and a first shaft hole 343 that penetrate the two first side plates 349 along the aforementioned penetration direction. Similarly, the second The half portion 350 has a second recess 351 that penetrates the two second side plates 359 along the aforementioned penetration direction, a second insert groove 356 and a second shaft hole 353, wherein the first recess 341, the second recess 351, the second recess 353 and the second recess 353. The cross-sectional shapes and relative relationships of the first caulking groove 346 and the second caulking groove 356 are the same as those of the second preferred embodiment mentioned above. That is to say, the first caulking groove 346 and the second caulking groove 356 are also located in the first recess respectively. Notches 347 and 357 extending along the penetration direction are formed on the inner wall surfaces of the first side plate 349 and the second side plate 351 respectively. A first inlay rod 348 is embedded in the first inlay groove 346 of the first half 340, and its opposite ends are respectively supported by the two first side plates 349; a second inlay rod 358 is embedded in the second half 350. The opposite ends of the second inlay groove 356 are respectively supported by the two second side plates 359 .

There is a connecting block 365 on the top of the first half 340 and the second half 350. The connecting block 365 is simultaneously interposed between the two first side plates 349 and the two second side plates 359, and has a connecting block 365 with the first side plate 349 respectively. The first shaft hole 343 and the second shaft hole 353 on the second side plate 359 are matched with two intermediate shaft holes 366 (see FIG. 15 ). The first half 340 is formed by penetrating the first shaft hole 343 and one of the intermediate shaft holes. A long bolt 360 of 366 (the tail end of which is screwed into a nut 361) pivotally connects the top to the connecting block 365. Similarly, the second half 350 uses a bolt that penetrates the aforementioned second shaft hole 353 and another intermediate shaft hole 366. A long bolt 360 (the tail end of which is threaded into a nut 361) pivotally connects the top to the connecting block 365, whereby the first half 340 and the second half 350 can rotate relatively close to or away from each other.

The tightening mechanism in this embodiment is essentially the same as the second preferred embodiment: the elastic operating member (long bolt) 370 passes through the notch 354 at the bottom of the second half 350 and the through hole 344 at the bottom of the first half 340 , the head of the bolt contacts the outer surface of the second half 350 through a washer 374, and the tail end of the bolt is screwed into a nut 375 and contacts the outer surface of the first half 340 through a washer 376, thereby enabling the tightening operation. When the component 370 and the nut 375 are rotated relative to each other, the first half 340 and the second half 350 can be relatively close to or away from each other.

As shown in FIG. 15 , the first recess 341 of the first half 340 and the second recess 351 of the second half 350 together form a through space (not labeled) with an approximately circular cross-section. Viewed from the cross-section, the The inner wall surfaces of the first recess 341 and the second recess 351 each form an arc with an arc of approximately 180 degrees. The portion of the first inlay rod 348 embedded in the first inlay groove 346 that protrudes into the penetrating space forms a first The protruding strip 342 forms a second protruding strip 352 at the portion of the second inlay rod 358 embedded in the second inlay groove 356 that protrudes into the penetrating space. When the first half 340 and the second half 350 of the clamp body clamp the cylindrical part of a rod, they also use the first convex strip 342 and the second convex strip 352 located on opposite sides of the through space. Contact two opposite positions on the circumference of the aforementioned cylindrical part. In the clamping state, another position on the circumference of the cylindrical part may abut the inner wall surface of the first recess 341 or the second recess 351 (which only exists on the first side plate 349 or the second side plate 359 ).

With the same effect, the first half 340 and the second half 350 of the clamp body in this embodiment have less volume (metal material) and lighter weight, which can further save costs and improve availability.

The structure of the rod clamping device 430 of the fourth preferred embodiment of the present invention shown in Figure 16 is similar to that of the previous embodiment. The main difference lies in the addition of third and fourth protrusions 442', 452'. For details, , the first recess 441 of the first half 440 has a first protrusion 442 and a third protrusion 442' extending along the through direction (corresponding to the axial direction of the rod), and the second recess of the second half 450 There are second protrusions 452 and fourth protrusions 452' extending along the penetration direction in the gap 451. The first protrusions 442 and the second protrusions 452 are located on opposite sides of the penetration space (for example, the lower left corner in Figure 16 corner and the upper right corner), the aforementioned third convex strip 442' and the fourth convex strip 452' are located on the other two opposite sides of the through space (for example, the upper left corner and the lower right corner in Figure 16); in the cross section of the through space, the The angle between the connecting line (not shown in the figure) of the first convex strip 442 and the second convex strip 452 and the connecting line (not shown in the figure) of the third convex strip 442' and the fourth convex strip 452' is greater than 60 degrees. Example is close to 90 degrees. In this embodiment, the first and third convex strips in the first recess 441 and the second and fourth convex strips in the second recess 451 are made by embedding an inlaid rod (metal round rod) 448 , 458 is formed, the embedded structure is the same as before, and will not be described again. In other possible implementations, two convex strips may be formed in the first recess of the first half and in the second recess of the second half by integral molding.

Based on the top-up structure of this embodiment, when the first half 440 and the second half 450 of the clamp body clamp the cylindrical part of a rod, the first convex strip 442 and the second convex strip 452 remain in contact with each other. The aforementioned third protruding strip 442' and the aforementioned fourth protruding strip 452' remain in contact with the other two opposite positions on the circumferential surface of the aforementioned cylindrical part. In addition, the insides of the first recess 441 and the second recess 451 do not contact the circumferential surface of the aforementioned cylindrical portion. Because the clamping force of the clamp body symmetrically abuts the circumferential four sides of the aforementioned cylindrical part through two pairs of convex strips parallel to the axial direction of the rod body, it has good clamping strength and stability.

Finally, please refer to Figure 17. The rod clamping device 530 of the fifth preferred embodiment of the present invention is implemented in a familiar "quick release clamp" type, in which the main clamp The body 531 is integrally formed from a metal material (such as aluminum alloy) and is roughly C-shaped. The symmetrical sides of the C-shape form a first half 540 and a second half 550 respectively. The body 531 can be relatively close to or away from each other by the elasticity of the metal material ( That is, the opening of the C-shape is reduced or expanded), and a through-space 532 with an approximately circular cross-section is formed inside the C-shape. This means that the first half 540 and the second half 550 respectively have an approximately semi-circular cross-section. A first recess 541 and a second recess 551. The first recess 541 has a first convex strip 542 on its arc-shaped inner wall, and the second recess 551 has a first protrusion 542 on its arc-shaped inner wall. A second convex strip 552. The first convex strip 542 and the second convex strip 552 are located on opposite sides of the through space (for example, about 7 o'clock and about 1 o'clock in Figure 17), respectively along the through space. The penetration direction of the space 532 (corresponding to the rod axis direction) extends. The tightening mechanism is provided at the opening of the clamp body 531 and has a screw rod 573 that passes through the first half 540 and the second half 550 . One end of the screw rod 573 is screwed into a nut that is in contact with the first half 540 575, the other end is vertically connected to a torsion shaft 576, on which a rotatable elastic operating member 570 is pivoted. The cam portion 571 of the elastic operating member 570 surrounding the torsion shaft 576 is in contact with the second half through a pad 574. 550, whereby the trigger portion 572 of the elastic operating member 570 is turned so that the cam portion 571 faces the pad 574 with different sides with gradually changing radial lengths, thereby controlling the opening width of the clamp body 531, that is, the third The first half 540 and the second half 550 are relatively close or far apart.

211: Cylindrical part

23: slot

30: Rod body clamping device

32: Through space

40:First half

41:First notch

42: First convex strip

43:First shaft hole

44:Screw hole

45: Pin hole

50:Second half

51:Second notch

52: Second convex strip

53:Second shaft hole

54: Gap

60:Long bolt

70: Elastic operating parts

71: Straight rod

72:Screw

73:Rotating handle

74: Washer

80:Protruding pin

Claims (10)

A rod clamping device that can clamp the cylindrical part of a rod; the aforementioned rod clamping device includes: A clamp body has a first axial direction, a second axial direction, a first half and a second half. The first axial direction is parallel to the axis of the cylindrical part of the rod body, and the second axis The foregoing first half and the foregoing second half are opposite to each other in the foregoing second axial direction; the foregoing first half has an approximately semicircular cross-section extending along the foregoing first axial direction. The first recess, the recess of the first recess faces the second half, and the second half has a second recess extending along the first axial direction and having an approximately semicircular cross-section. The notch of the recess faces the first half, and the first recess and the second recess together form a through space with an approximately circular cross-section for accommodating the cylindrical portion of the rod body; and A clamping mechanism is provided on the main body of the clamp, which can bring the first half and the second half of the main body of the clamp relatively close to each other, thereby clamping the cylindrical part of the rod body; It is characterized in that: the first recess of the first half has a first convex strip extending along the first axial direction, and the second recess of the second half has a first convex strip extending along the first axial direction. An axially extending second convex strip, the first convex strip and the second convex strip are located on opposite sides of the through space; when the first half and the second half of the clamp body are relatively close to each other, they are clamped In the case of the cylindrical portion of the rod body, the first convex strip and the second convex strip remain in contact with the circumferential surface of the cylindrical portion at two opposite positions on the circumference. In addition, the first recess and the second convex strip remain in contact with the circumferential surface of the cylindrical portion. The inside of the second recess does not contact the circumferential surface of the aforementioned cylindrical part, or only contacts another position on the circumference of the aforementioned circumferential surface. The rod clamping device of claim 1, wherein the first recess of the first half has a first insert groove extending along the first axial direction, and the first insert groove is located in the first recess. A notch extending along the first axial direction is formed on the inner wall of the recess; a first inlay rod is embedded in the first inlay groove, and part of the first inlay rod is formed by the groove of the first inlay groove. The mouth protrudes into the aforementioned through space to form the aforementioned first convex strip; the aforementioned second recess of the aforementioned second half has a second embedded groove extending along the aforementioned first axial direction, and the aforementioned second embedded groove is located in the aforementioned second recess. A notch extending along the first axial direction is formed on the inner wall of the second recess; a second insert rod is embedded in the second insert groove, and part of the second insert rod is formed by the second insert groove The notch protrudes to the aforementioned Through the space, the aforementioned second convex strip is formed. The rod clamping device of claim 2, wherein the first embedded groove extends from one end of the first recess to the other end along the first axial direction, and its cross-section is approximately circular; the first embedded rod The cross-section is circular, and the first embedded rod is embedded in the first embedded groove along the first axial direction; the second embedded groove extends from one end of the second recess to the other along the first axial direction. One end extends and its cross-section is approximately circular; the cross-section of the second embedded rod is circular, and the second embedded rod is embedded in the second embedded groove along the first axial direction. The rod clamping device of claim 3, wherein the first half has two first side plates facing each other in the first axial direction, and the first recess and the first insert groove are along the first axial direction. Penetrating the two first side plates, the opposite ends of the first embedded rod are respectively supported by the two first side plates; the second half has two second side plates opposite to each other in the first axial direction, and the second recess and The second embedding groove penetrates the two second side plates along the first axial direction, and the opposite ends of the second embedding rod are respectively supported by the two second side plates. The rod clamping device of claim 1, wherein the first convex strip protrudes from the inner wall surface of the first recess by a height, and the second convex strip protrudes from the inner wall surface of the second recess by a height of The height is less than 5% of the radius of the cylindrical part of the rod body. The rod clamping device of claim 1, wherein the cross-sectional outer edges of the first convex strip and the second convex strip are both arc-shaped. The rod clamping device of claim 1, wherein the surfaces of the first convex strip and the second convex strip each have concave and convex patterns. A rod clamping device that can clamp the cylindrical part of a rod; the aforementioned rod clamping device includes: A clamp body has a first axial direction, a second axial direction, a first half and a second half. The first axial direction is parallel to the axis of the cylindrical part of the rod body, and the second axis The aforementioned first half and the aforementioned second half are opposite to each other in the aforementioned second axial direction; the aforementioned first half has an approximately semicircular cross-section extending along the aforementioned first axial direction. The first recess, the recess of the first recess faces the second half, and the second half has a second recess extending along the first axial direction and having an approximately semicircular cross-section. The notch of the recess faces the first half, and the first recess and the second recess together form a through space with an approximately circular cross-section for accommodating the cylindrical portion of the rod body; and A clamping mechanism is provided on the main body of the clamp, which can bring the first half and the second half of the main body of the clamp relatively close to each other, thereby clamping the cylindrical part of the rod body; It is characterized in that: the first recess of the first half has a first convex strip and a third convex strip extending along the first axial direction, and the second recess of the second half has It has a second convex strip and a fourth convex strip extending along the first axial direction. The first convex strip and the second convex strip are located on opposite sides of the through space. The third convex strip and the aforementioned The fourth convex strips are located on the other two opposite sides of the through-space, and in the cross-section of the through-space, the connecting lines between the first convex strips and the second convex strips and the third convex strips and the fourth convex strips are The angle between the connecting lines of the bars is greater than 60 degrees; when the first half and the second half of the clamp body are relatively close to clamp the cylindrical part of the rod body, the first convex bar and the second convex bar remain abutting against the circumferential surface of the aforementioned cylindrical portion at two opposite positions on the circumference, and the aforementioned third convex strip and the aforementioned fourth protruding strip remaining in contact with the aforementioned cylindrical portion at two opposite positions on the circumferential surface of the circumference, in addition to , the insides of the first recess and the second recess do not contact the circumferential surface of the cylindrical part. A kind of sports equipment that allows the user to perform a specific exercise and has a specific rod body and a specific part that allows the user to adjust the relative position steplessly; it is characterized by including any one of claims 1 to 8 Rod clamping device, the rod clamping device is located at the specific part, and uses the through space to accommodate a cylindrical part of the specific rod; the clamping mechanism can be operated repeatedly by the user to make the clamp body The first half and the second half are relatively close to or far away from each other, thereby clamping or relaxing the cylindrical portion of the specific rod body, so that the specific rod body and the cylindrical portion of the specific rod body can be changed when the clamp body relaxes the cylindrical portion of the specific rod body. The relative position of the specific part, and the relative position of the specific rod and the specific part is locked when the clamp body clamps the cylindrical part of the specific rod. Such as the sports equipment of claim 9, wherein the aforementioned specific rod body has a cross bar portion and two gripping portions respectively connected at two opposite ends of the aforementioned cross bar portion, and a partial section of the aforementioned cross bar portion forms the aforementioned cylindrical portion; when When the user performs the aforementioned specific movement, the aforementioned clamp body clamps the cylindrical portion of the aforementioned crossbar portion so that the aforementioned user can grasp the aforementioned two fixed gripping portions; when the aforementioned fixture body relaxes the aforementioned cylindrical portion, the aforementioned The specific rod body can rotate within a predetermined angle range with the axis of the aforementioned cylindrical part as the rotation axis to change the position of the aforementioned two gripping parts.

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