CN112937393A - Backrest framework - Google Patents
Backrest framework Download PDFInfo
- Publication number
- CN112937393A CN112937393A CN202110351581.3A CN202110351581A CN112937393A CN 112937393 A CN112937393 A CN 112937393A CN 202110351581 A CN202110351581 A CN 202110351581A CN 112937393 A CN112937393 A CN 112937393A
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- Prior art keywords
- plate
- back plate
- waist
- gear
- supporting plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/68—Seat frames
- B60N2/686—Panel like structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/64—Back-rests or cushions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/64—Back-rests or cushions
- B60N2/66—Lumbar supports
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
The invention discloses a backrest framework, which comprises a front back plate and a rear back plate which are arranged in a front-back opposite mode, wherein a window is formed in the middle of the front back plate to be in a frame shape, frame strips of the front back plate are attached to the front side surface of the rear back plate, and the front back plate and the rear back plate are in snap fit; the middle sections of the frame strips on the two sides of the front back plate are separated from the corresponding side edges of the back plate, so that two movable guide cavities are formed, a waist supporting plate is arranged in a window area, the waist supporting plate is located in a vertical plane and extends horizontally, the two ends of the waist supporting plate respectively extend into the corresponding movable guide cavities, and a self-positioning mechanism is arranged between the waist supporting plate and the movable guide cavities. The invention has the beneficial effects that: the waist layer board middle part is exposed by the window on the preceding backplate and is played the supporting role, and the sliding location structure between waist layer board and the backplate subassembly is in hidden state, fixes a position many shelves in the journey scope, convenient to use, easily assembly, and the outward appearance is clean and tidy, and the wholeness is good.
Description
Technical Field
The invention belongs to the technical field of seat structures, and particularly relates to a backrest framework.
Background
The back frame is often covered with foam and a cover to improve its comfort. In order to meet the requirements of partial users, the backrest framework is further provided with a waist support, so that the waist of a sitting person is supported, the support performance is further improved, and the fatigue is relieved. But in order to improve the universality of the chair and meet the use requirements of users with different heights and shapes, the waist support needs to have a lifting adjusting function. The prior art discloses some waist supports that rely on an electrically driven lifting mechanism for adjustment, however, the structure is relatively complex. Chinese patent document with publication number CN209660969U discloses a seat, including chassis and backrest frame, wherein be equipped with soft backrest in the frame, be connected with the support of L type between chassis and the backrest frame, the support of this L type has vertical portion and horizontal portion, wherein horizontal portion connects in the chassis, set up the arc supporter that two horizontal directions extend in vertical portion, arc supporter both ends respectively with the frame attach, set up the sliding tray in the vertical portion, the waist holds in the palm the setting in the backrest rear side, the rear side that the waist held in the palm passes through regulating part and is connected with the sliding tray, in order to realize the upper and lower regulation of waist support. However, the lifting adjustment of the lumbar support is inconvenient, and the seat is not highly aesthetic.
Disclosure of Invention
In view of the above, the present invention provides a backrest frame.
The technical scheme is as follows:
the backrest framework is characterized by comprising a front back plate and a rear back plate which are arranged in a front-back opposite mode;
the shape of the front back plate is matched with that of the back plate, a window is formed in the middle of the front back plate to be in a frame shape, the frame strips of the front back plate are attached to the front side face of the back plate, and at least two inserting and hanging structures and a non-return structure are arranged between the frame strips of the front back plate and the back plate to enable the front back plate and the back plate to be buckled and matched;
the middle sections of the frame strips on the two sides of the front back plate are separated from the corresponding side edges of the back plate, so that two movable guide cavities are formed, the two sides of each movable guide cavity are provided with openings, and the inner openings of the movable guide cavities face the window;
the window area is equipped with the waist layer board, and this waist layer board is located the vertical plane and horizontal extension, and its both ends stretch into respectively correspondingly remove the guide chamber, this waist layer board with remove and be equipped with from positioning mechanism between the guide chamber.
As a preferred technical solution, the above inserting and hanging structure includes inserting blocks and hanging holes, wherein the inserting blocks are fixedly arranged on the rear side surface of the front back plate, the front ends of all the inserting blocks face the same direction, the hanging holes are formed in the rear back plate, the hanging holes correspond to the inserting blocks one to one, the hanging holes have openings facing the inserting blocks, and the inserting blocks are inserted in the corresponding hanging holes;
the non-return structure is a front back plate step and a back plate step which are opposite to each other, and the front back plate step and the back plate step are mutually abutted to prevent the insertion block from withdrawing from the corresponding hanging hole.
As a preferred technical scheme, at least one insertion block is respectively arranged on the upper frame strip, the lower frame strip and the frame strips on the two sides of the front back plate, and the front end of the insertion block faces downwards;
the front side face of the rear back plate is fixedly provided with a groove-shaped plate corresponding to each insertion block respectively, the notch of the groove-shaped plate faces backwards, the opening at one end of the groove-shaped plate faces upwards, and the groove walls at two sides of the groove-shaped plate are fixedly connected with the front side face of the rear back plate so as to form the hanging hole with the rear back plate in an enclosing mode.
As a preferred technical scheme, the self-positioning mechanism comprises a group of gear blocks arranged at intervals in the movable guide cavity, the gear blocks are vertically distributed along the movable guide cavity, and the gear blocks are connected with the inner wall of the movable guide cavity;
the waist supporting plate is provided with a positioning block, the positioning block moves along the gear blocks, the positioning block is in elastic interference fit with the gear blocks, the positioning block is opposite to the gear blocks and enables the waist supporting plate to move when sliding, and the positioning block is clamped between any two adjacent gear blocks and enables the waist supporting plate to be positioned.
As a preferred technical solution, the waist supporting plate is fixedly connected with an L-shaped bending plate, the bending plate includes a vertical portion vertically arranged on the front side of the end portion of the waist supporting plate, the vertical portion is vertically arranged, the rear side edge of the vertical portion is fixedly connected with the end portion of the waist supporting plate, the front side edge of the vertical portion is connected with a parallel portion, the parallel portion is parallel to the front side of the end portion of the waist supporting plate, one side edge of the parallel portion is connected with the front side edge of the vertical portion, so as to form a sliding chute with a lateral opening with the end portion of the waist supporting plate;
the length of the sliding groove is greater than the distance between any two adjacent gear blocks, the gear blocks are arranged between the two side groove walls of the sliding groove in a tooth shape, the root parts of the gear blocks are connected with the inner wall of the front side of the moving guide cavity, and the top parts of the gear blocks extend into the sliding groove and are attached to the two side groove walls of the sliding groove;
the middle part of the inner side surface of the parallel part protrudes towards the position between the gear blocks to form the positioning block.
As a preferred technical scheme, the notch of the sliding groove faces the waist support adjusting area, and the top of the gear block extends outwards to a position between two side groove walls of the sliding groove.
As a preferred technical scheme, the shift block comprises a toothed shift plate, the plate surface of the shift plate faces the front-rear direction, the root of the shift plate is connected with the front wall of the moving guide cavity, the top of the shift plate extends backwards and then continues to extend outwards, and a reinforcing block is integrally formed between the edge of the shift plate and the front wall of the moving guide cavity.
As a preferred technical scheme, the middle sections of the frame strips at the two sides of the front back plate are both shifted forwards to form a protruding section, and the protruding section is separated from the corresponding side edge of the back plate, so that the mobile guide cavity is formed;
the top and the bottom of each mobile guide cavity are respectively provided with one inserting and hanging structure;
the top of the movable guide cavity is also fixedly provided with a stop block, and the stop block is vertically arranged on the front side surface of the rear back plate and extends towards the protruding section.
As a preferred technical scheme, the horizontal section of the rear back plate is in an arc shape protruding backwards;
the waist supporting plate comprises a strip-shaped supporting plate, the supporting plate and the back plate are mutually separated to form a crescent separating area, strip-shaped positioning plates are respectively connected to two ends of the supporting plate, the inner ends of the positioning plates are connected with the supporting plate, the outer ends of the positioning plates horizontally extend outwards and forwards along the front side face of the back plate, and the outer ends of the positioning plates extend into the corresponding moving guide cavities and extend out of the outer openings of the moving guide cavities to be connected with adjusting handles.
As a preferred technical scheme, the front side surfaces of the two ends of the supporting plate are respectively and backwards offset to form first connecting parts, the rear side surfaces of the inner ends of the positioning plates are respectively thinned corresponding to the first connecting parts to form second connecting parts, the second connecting parts are attached to and riveted with the first connecting parts, and the front side surfaces of the second connecting parts are flush with the front side surfaces of the supporting plate;
the rear side surface of the second connecting part is connected with a riveting column which penetrates into the corresponding first connecting part to rivet the first connecting part and the second connecting part;
the positioning plate is integrally formed with the bending plate.
Compared with the prior art, the invention has the beneficial effects that: set up slide adjusting and location structure between waist layer board and the preceding backplate to the backplate subassembly that forms after assembling by preceding backplate and backplate holds in the palm to the waist and carries on spacingly, and waist layer board middle part is exposed by the window on the preceding backplate, and slide positioning structure between waist layer board and the backplate subassembly is in hidden state, and the waist layer board can be from the location, and many grades of location in the journey within range, convenient to use, easily assembly, the outward appearance is clean and tidy, and the wholeness is good.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is an enlarged view of a portion a of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 5 is a cross-sectional view taken along line C-C of FIG. 1;
FIG. 6 is an enlarged view of portion b of FIG. 5;
FIG. 7 is an enlarged view of the portion c of FIG. 1;
FIG. 8 is a left side view of FIG. 1;
FIG. 9 is a schematic structural view of a front backplate;
FIG. 10 is a rear view of FIG. 9;
FIG. 11 is a schematic view of the construction of the backplate;
FIG. 12 is a schematic structural view of a waist support plate;
FIG. 13 is a top view of FIG. 12;
fig. 14 is a cross-sectional view taken along line D-D of fig. 13.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
As shown in fig. 1 to 8, a back frame includes a front back plate 200 and a back plate 100 which are disposed opposite to each other in a front-back direction. The horizontal section of the backboard 100 is in an arc shape protruding backwards, so that the backboard is adapted to the shape of the back of a human body and accords with human engineering. The shape of the front backplate 200 is adapted to that of the rear backplate 100, a window 220 is formed in the middle of the front backplate 200 to form a frame shape, the frame strips of the front backplate 200 are attached to the front side surface of the rear backplate 100, and at least two insertion hanging structures and non-return structures are arranged between the frame strips of the front backplate 200 and the rear backplate 100 to enable the front backplate 200 and the rear backplate 100 to be matched in a buckling manner.
As shown in fig. 1 and 5, the two frame strips of the front-back panel 200 are separated from the corresponding sides of the back-back panel 100 to form two moving guide chambers 400, and the moving guide chambers 400 are open at both sides and open at the inner side toward the window 220. The area of the window 220 forms a waist support adjusting area, a waist supporting plate 300 is arranged in the waist support adjusting area, the waist supporting plate 300 is positioned in a vertical plane and extends horizontally, two ends of the waist supporting plate 300 respectively extend into the corresponding moving guide cavities 400, and a self-positioning mechanism is arranged between the waist supporting plate 300 and the moving guide cavities 400.
As shown in fig. 2, 3 and 8, the middle sections of the two side frame strips of the front-back panel 200 are offset forward to form protruding sections that are spaced apart from the corresponding side edges of the rear-back panel 100, thereby forming the movement guide chamber 400. The top and the bottom of each of the mobile guide chambers 400 are respectively provided with one of the insertion and hanging structures. A stopper 104 is fixedly provided at the top of the moving guide chamber 400, and the stopper 104 is erected on the front side surface of the back plate 100 and protrudes toward the protruding section to prevent the back plate 100 from being separated from the front plate 200 due to an upward impact when the lumbar support plate 300 slides upward.
As shown in fig. 2 and 4, the inserting and hanging structure includes an inserting block 201 and a hanging hole 101, wherein the inserting block 201 is fixedly disposed on the rear side surface of the front backboard 200, the front end of the inserting block is downward, the hanging hole 101 is disposed on the rear backboard 100, the hanging hole 101 corresponds to the inserting block 201 one by one, and the hanging hole 101 has an upward opening. The backstop structure is a front backboard step 202 and a back backboard step 102 which are opposite to each other. The insertion blocks 201 are inserted into the corresponding hanging holes 101, and the front backboard steps 202 and the back backboard steps 102 abut against each other to prevent the insertion blocks 201 from being withdrawn from the corresponding hanging holes 101.
As shown in fig. 9 and 10, at least one of the insertion blocks 201 is disposed on the upper frame strip, the lower frame strip and the two side frame strips of the front back panel 200. As shown in fig. 11, a groove plate 103 is fixedly disposed on the front side of the back panel 100 corresponding to each plug 201, a notch of the groove plate 103 faces backwards, an opening of one end of the groove plate 103 faces upwards, and two groove walls of the groove plate 103 are fixedly connected to the front side of the back panel 100, so as to form the hanging hole 101 with the back panel 100.
As fig. 10, the inserted block 201 includes inserted plate 201a, and the cross-section of this inserted plate 201a is the L shape, and this inserted plate 201a is including founding the extension of stepping down of preceding backplate 200 trailing flank, the front edge of the extension of stepping down with preceding backplate 200 is connected, the back edge of the extension of stepping down extends backward and is connected with grafting portion, the vertical setting of grafting portion, its upper edge with the extension of stepping down is connected, and its lower limb downwardly extending is in order to form inserted block 201 front end. The front end of the insertion part extends downwards and deflects backwards, so that the insertion block 201 enters the hanging hole 101 during assembly. A first reinforcing rib 201b is connected between the rear side surface of the insertion plate 201a and the front back plate 200 to improve the strength thereof. The front back plate 200 opposite to the insertion part is provided with a yielding hole 203 so as to integrally form the insertion block 201 and the front back plate 200.
As shown in fig. 4 and 10, the front panel step 202 is respectively disposed on the rear side of the upper frame strip of the front panel 200 near two ends thereof, and the front panel step 202 faces downward. The rear side of the front backplate 200 corresponding to the rear backplate step 102 protrudes backwards to form the front backplate step 202, a U-shaped reinforcing rib 204 is arranged around the front backplate step 202, the opening of the U-shaped reinforcing rib 204 faces downwards, a thinning part is formed between the U-shaped reinforcing rib 204 and the front backplate 200 between the front backplate step 202, the rear side of the thinning part gradually deflects forwards from bottom to top to thin the thinning part, and a deformation joint is formed between the upper edge of the thinning part and the U-shaped reinforcing rib 204, so that the local area where the front backplate step 202 is located has certain elastic deformation capability, and the front backplate step 202 and the rear backplate step 202 can be stably matched when bearing force is applied.
Referring to fig. 2 and 11, the front side of the rear plate 100 is provided with an upward rear plate step 102 corresponding to the front plate step 202. The rear back plate step 102 is arranged on the upper portion of the rear back plate 100, the rear back plate step 102 includes a retaining plate 102a vertically arranged on the front side of the rear back plate 100, any one side of the retaining plate 102a faces downward, and a second reinforcing rib 102b is connected between the upper surface of the retaining plate 102a and the rear back plate 100. The second reinforcing ribs 102b are vertically arranged and horizontally distributed along the retaining plate 102 a.
Referring to fig. 2, 3, 6 and 7, the self-positioning mechanism includes a set of spaced-apart gear blocks 210 disposed in the moving guide cavity 400, the gear blocks 210 are vertically distributed along the moving guide cavity 400, and the gear blocks 210 are connected to an inner wall of the moving guide cavity 400.
The waist supporting plate 300 is provided with a positioning block 302, the positioning block 302 moves along the gear block 210, the positioning block 302 is in elastic interference fit with the gear block 210, the waist supporting plate 300 moves when the positioning block 302 slides relative to the gear block 210, and the waist supporting plate 300 is positioned when the positioning block 302 is clamped between any two adjacent gear blocks 210.
As shown in fig. 6, 7 and 12, an L-shaped bending plate 301 is fixedly connected to the waist support plate 300, the bending plate 301 includes a vertical portion vertically disposed on the front side of the end portion of the waist support plate 300, the vertical portion is vertically disposed, the rear side edge of the vertical portion is fixedly connected to the end portion of the waist support plate 300, the front side edge of the vertical portion is connected to a parallel portion, the parallel portion is parallel to the front side of the end portion of the waist support plate 300, and one side edge of the parallel portion is connected to the front side edge of the vertical portion to form a sliding slot with a lateral opening with the end portion of the waist support plate 300. A reinforcing rib 303 is provided between the outer side surface of the vertical portion and the end of the waist support plate 300.
As shown in fig. 3 and 7, the length of the sliding slot is greater than the distance between any two adjacent gear blocks 210, the gear blocks 210 are disposed between the two side walls of the sliding slot, the root of each gear block 210 is connected to the front inner wall of the moving guide cavity 400, and the top of each gear block 210 extends into the sliding slot and abuts against the two side walls of the sliding slot. The middle of the inner side of the parallel portion protrudes toward the space between the gear blocks 210 to form the positioning block 302.
Referring to fig. 5 and 12, in the present embodiment, the slot of the sliding slot faces the lumbar support adjustment area, and the top of the stop block 210 extends outward to between the two side slot walls of the sliding slot. The notches of the two sliding grooves are opposite to each other and matched with the corresponding gear blocks 210, so that the waist supporting plate 300 is limited in the left-right direction.
As shown in fig. 6 and 7, a sliding limiting region is formed between each set of the gear blocks 210 and the front wall of the moving guide cavity 400, and the parallel portions of the bending plates 301 are located in the corresponding sliding limiting regions, which helps to maintain the stability of the sliding of the lumbar support plate 300 relative to the front back plate 200.
As shown in fig. 7, the shift block 210 includes a toothed shift plate 211, a plate surface of the shift plate 211 faces in the front-rear direction, a root of the shift plate 211 is connected to the front wall of the movement guide cavity 400, a top of the shift plate 211 protrudes rearward and then continues to extend outward, and a reinforcing block 212 is integrally formed between an edge of the shift plate 211 and the front wall of the movement guide cavity 400. Through holes 230 are respectively formed in the protruding sections corresponding to each gear block 210, so that the front backboard 200 can be molded and demoulded conveniently, the local rigidity is weakened, and the positioning blocks 302 can slide through the gear blocks 210 conveniently.
As shown in fig. 5, 12 to 14, the waist support plate 300 includes a strip-shaped support plate 310, the support plate 310 is substantially in a straight plate shape, the support plate 310 and the back plate 100 are separated from each other to form a crescent-shaped partition, the two ends of the support plate 310 are respectively connected to strip-shaped positioning plates 320, the inner ends of the positioning plates 320 are connected to the support plate 310, the outer ends of the positioning plates 320 horizontally extend outwards and forwards along the front side of the back plate 100, the outer ends of the positioning plates 320 extend into the corresponding moving guide cavities 400 and extend out of the outer openings thereof to be connected to adjusting handles 330.
As shown in fig. 14, the front sides of the two ends of the supporting plate 310 are respectively shifted backwards to form first connecting portions 311, the back sides of the inner ends of the positioning plate 320 are respectively thinned corresponding to the first connecting portions 311 to form second connecting portions 321, the second connecting portions 321 are abutted against and riveted with the first connecting portions 311, and the front sides of the second connecting portions 321 are flush with the front sides of the supporting plate 310.
The rear side of the second connecting portion 321 is connected to a rivet 322, and the rivet 322 penetrates into the corresponding first connecting portion 311 to rivet the first connecting portion 311 and the second connecting portion 321. The positioning plate 320 is integrally formed with the bending plate 301.
The sliding grooves at the two ends of the waist support plate 300 are clamped on the corresponding gear blocks 210, and are assembled with the front back plate 200 into a whole, and then the front back plate 200 and the back plate 100 are clamped and assembled. After the assembly is completed, a cover is mounted on the back plate assembly, and an adjusting seam is left at the position, corresponding to the outer opening of the moving guide cavity 400, of the cover, so that the waist support plate 300 leaks out. When the user needs to adjust the height of the waist support, the height of the waist support plate 300 can be conveniently adjusted by holding the adjusting handle 330.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (10)
1. A back frame, comprising: comprises a front backboard (200) and a back backboard (100) which are arranged in a front-back opposite way;
the shape of the front back plate (200) is adapted to that of the rear back plate (100), a window (220) is formed in the middle of the front back plate (200) to be in a frame shape, a frame strip of the front back plate (200) is attached to the front side surface of the rear back plate (100), and at least two inserting and hanging structures and non-return structures are arranged between the frame strip of the front back plate (200) and the rear back plate (100) to enable the front back plate (200) and the rear back plate (100) to be in snap fit;
the middle sections of the frame strips on the two sides of the front back plate (200) are separated from the corresponding side edges of the back plate (100) so as to form two moving guide cavities (400), wherein the two sides of each moving guide cavity (400) are open, and the inner side of each moving guide cavity is open towards the window (220);
the area of the window (220) is provided with a waist supporting plate (300), the waist supporting plate (300) is positioned in a vertical plane and extends horizontally, two ends of the waist supporting plate respectively extend into the corresponding movable guide cavities (400), and a self-positioning mechanism is arranged between the waist supporting plate (300) and the movable guide cavities (400).
2. The back frame of claim 1, wherein: the inserting and hanging structure comprises inserting blocks (201) and hanging holes (101), wherein the inserting blocks (201) are fixedly arranged on the rear side face of the front back plate (200), the hanging holes (101) are formed in the rear back plate (100) in the same direction of the front ends of the inserting blocks (201), the hanging holes (101) are in one-to-one correspondence with the inserting blocks (201), the hanging holes (101) are provided with openings facing the inserting blocks (201), and the inserting blocks (201) are inserted into the corresponding hanging holes (101);
the non-return structure comprises a front back plate step (202) and a back plate step (102) which are opposite to each other, and the front back plate step (202) and the back plate step (102) are abutted against each other to prevent the insertion block (201) from withdrawing from the corresponding hanging hole (101).
3. The back frame of claim 2, wherein: at least one inserting block (201) is arranged on the upper frame strip, the lower frame strip and the frame strips on the two sides of the front back plate (200), and the front end of the inserting block (201) faces downwards;
the front side face of the rear back plate (100) corresponds to each plug-in block (201) and is fixedly provided with a groove-shaped plate (103) respectively, the notch of the groove-shaped plate (103) is backward, the opening at one end of the groove-shaped plate (103) is upward, and the groove walls at two sides of the groove-shaped plate (103) are fixedly connected with the front side face of the rear back plate (100) so as to form the hanging hole (101) by enclosing with the rear back plate (100).
4. The back frame of claim 2, wherein: the self-positioning mechanism comprises a group of gear blocks (210) arranged at intervals in the movable guide cavity (400), the gear blocks (210) are vertically distributed along the movable guide cavity (400), and the gear blocks (210) are connected with the inner wall of the movable guide cavity (400);
be equipped with locating piece (302) on waist layer board (300), locating piece (302) along gear piece (210) remove, locating piece (302) with gear piece (210) elasticity interference fit, locating piece (302) make when relative gear piece (210) slide waist layer board (300) remove, locating piece (302) card makes when arbitrary adjacent two gear piece (210) are between waist layer board (300) location.
5. The back frame of claim 4, wherein: the waist supporting plate (300) is fixedly connected with an L-shaped bending plate (301), the bending plate (301) comprises a vertical part vertically arranged on the front side surface of the end part of the waist supporting plate (300), the vertical part is vertically arranged, the rear side edge of the vertical part is fixedly connected with the end part of the waist supporting plate (300), the front side edge of the vertical part is connected with a parallel part, the parallel part is parallel to the front side surface of the end part of the waist supporting plate (300), one side edge of the parallel part is connected with the front side edge of the vertical part, so that a sliding chute with an opening in the lateral direction is formed between the parallel part and the end part of the waist supporting plate (300);
the length of the sliding groove is larger than the distance between any two adjacent gear blocks (210), the gear blocks (210) are arranged between the two side groove walls of the sliding groove in a tooth shape, the root parts of the gear blocks (210) are connected with the inner wall of the front side of the moving guide cavity (400), and the top parts of the gear blocks (210) extend into the sliding groove and are attached to the two side groove walls of the sliding groove;
the middle part of the inner side surface of the parallel part protrudes towards the position between the gear blocks (210) to form the positioning block (302).
6. The back frame of claim 5, wherein: the notch of spout towards the waist holds in the palm regulation area, the top of gear piece (210) extends outwards to between the both sides cell wall of spout.
7. The back frame of claim 5, wherein: the gear block (210) comprises a toothed gear plate (211), the plate surface of the gear plate (211) faces the front-back direction, the root of the gear plate (211) is connected with the front wall of the moving guide cavity (400), the top of the gear plate (211) extends backwards and then continues to extend outwards, and a reinforcing block (212) is integrally formed between the edge of the gear plate (211) and the front wall of the moving guide cavity (400).
8. The back frame of claim 1, wherein: the middle sections of the frame strips at the two sides of the front back plate (200) are forwards deviated to form a protruding section which is separated from the corresponding side edge of the back plate (100), so that the mobile guide cavity (400) is formed;
the top and the bottom of each mobile guide cavity (400) are respectively provided with one inserting and hanging structure;
the top of the movable guide cavity (400) is also fixedly provided with a stop block (104), and the stop block (104) is vertically arranged on the front side surface of the rear back plate (100) and extends towards the protruding section.
9. The back frame of claim 7, wherein: the horizontal section of the rear back plate (100) is in an arc shape protruding backwards;
the waist supporting plate (300) comprises a strip-shaped supporting plate (310), the supporting plate (310) and the rear back plate (100) are mutually separated to form a crescent-shaped separation area, strip-shaped positioning plates (320) are respectively connected to two ends of the supporting plate (310), the inner ends of the positioning plates (320) are connected with the supporting plate (310), the outer ends of the positioning plates (320) horizontally extend outwards and forwards along the front side surface of the rear back plate (100), and the outer ends of the positioning plates (320) extend into the corresponding moving guide cavities (400) and are connected with adjusting handles (330) after extending out of the outer openings of the positioning plates.
10. A back frame as claimed in claim 9, wherein: the front side surfaces of two ends of the supporting plate (310) are respectively and backwards deviated to form first connecting parts (311), the rear side surfaces of the inner ends of the positioning plates (320) are respectively thinned corresponding to the first connecting parts (311) to form second connecting parts (321), the second connecting parts (321) are attached to and riveted with the first connecting parts (311), and the front side surfaces of the second connecting parts (321) are flush with the front side surfaces of the supporting plate (310);
the rear side surface of the second connecting part (321) is connected with a riveting column (322), the riveting column (322) penetrates into the corresponding first connecting part (311) to rivet the first connecting part (311) and the second connecting part (321);
the positioning plate (320) is integrally formed with the bending plate (301).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110351581.3A CN112937393B (en) | 2021-03-31 | 2021-03-31 | Backrest framework |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110351581.3A CN112937393B (en) | 2021-03-31 | 2021-03-31 | Backrest framework |
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| Publication Number | Publication Date |
|---|---|
| CN112937393A true CN112937393A (en) | 2021-06-11 |
| CN112937393B CN112937393B (en) | 2023-04-21 |
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|---|---|---|---|
| CN202110351581.3A Active CN112937393B (en) | 2021-03-31 | 2021-03-31 | Backrest framework |
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Citations (26)
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