TWI676015B - External pressure display device - Google Patents

Abstract

An external pressure display device includes: a body, which has a through passage and an accommodation chamber inside; the passage communicates with the accommodation chamber by a side passage; and a window area is provided on the outside of the body corresponding to the passage. At the position of the container room, the window area is provided with an indicator window that can see the container room from the outside; a pressure indicating unit is located inside the container room and has: an elastic element and an indicator rod; the elastic element can be Provide an elastic force for the indicating rod; one end side of the indicating rod forms a pressure surface which can accept the pressure of air pressure from the side channel; a color indicating unit is provided between the window portion and the indicating rod There are at least two color blocks that can display different color blocks as the pressure changes. It can be connected to the bottom of an air tool and can indicate the change in pressure by color.

Description

External pressure display device

The invention relates to a pressure display device, in particular to an external-type pressure display device which is connected between an intake pipe and a pneumatic tool and can provide a pressure display function.

General pneumatic tools are mainly driven by the pressure of compressed gas to drive the pneumatic tools to operate. The pneumatic tools need to rely on the stable pressure of the compressed gas. When the pressure of the compressed gas is insufficient, the efficiency of the pneumatic tool will be insufficient. However, if the pressure of the compressed gas is too large, it will exert too much force or cause damage to the internal parts of the pneumatic tool. In order to monitor the intake pressure of the pneumatic tool, some pneumatic tools will have an air pressure display device inside. Allows the user to know the pressure of the compressed gas injected through the air pressure display device. Some pneumatic tools cannot be equipped with a pneumatic pressure display device in order to save costs or their own structural limitations. Please refer to the first figure. The user will connect a pressure gauge 10 externally. The pressure gauge can provide A gas pressure display function: through the external connection of the pressure gauge, the user can conveniently check what the current pressure value is.

However, the general pressure gauge 10 has a large volume of round surface. In use, its surface is too large to cause obstacles to the user, and it may cause jamming during movement, or affect the grasp of the hand when holding it. Pneumatic tools, although such an external structure can provide a pressure display effect, will affect the smooth operation of the pneumatic tools. In addition, because the pressure gauge 10 is connected to the pipeline, there is a distance from the body of the pneumatic tool. During the operation of the pneumatic tool, it is not possible to directly observe the current pressure condition on the periphery of the pneumatic tool. Not ideal, but necessary for modification.

The main object of the present invention is to provide a pressure display device which can be externally connected to a pneumatic tool and can display operating pressure conditions through colors.

A secondary object of the present invention is that the pressure display device can be installed on the bottom of the pneumatic tool, which can be easily read without affecting the operator of the pneumatic tool.

In order to achieve the above object, the present invention provides an external pressure display device, including: a body having a through passage and a container therein; the body is provided with an air inlet end and an air outlet at the two ends of the passage, respectively; End, the inlet end and the outlet end are in communication with the channel; both ends of the chamber have a pressure end and a pressure end, and the channel forms a side channel on the pressure end side of the chamber, the The channel communicates with the container room by a side channel; a window area is provided at the position of the outside of the body corresponding to the container room, and the window area is provided with an indicator window that can see outside the container room; a pressure indicating unit It is located inside the container and has: an elastic element and an indicator rod; the elastic element is provided on the pressure-bearing end side of the container; the indicator rod is connected to the elastic element; the elastic element It can provide the elastic force of the indicator rod towards the pressure end; the indicator rod forms a pressure surface on the end side of the pressure end, and the pressure surface can accept the air pressure from the side channel. The container moves, and the finger The local position of the stick will be displayed in the indication window; a color indicating unit is located between the window portion and the indicating rod, and has at least two color blocks, and the color indicating unit will generate different colors as the pressure changes. Display of blocks.

Preferably, the color indicating unit is a color plate provided on the window portion, the color plate is near the periphery of the indicating window and has at least two different color blocks along the moving direction of the indicating rod, A marker is provided on the indicating rod of the pressure indicating unit, and the label indicates different color blocks as the pressure changes.

Preferably, the color indicating unit is a color ring, and the color ring is arranged on the circumference of the indicating rod. The color ring has at least two different color blocks along the moving direction of the indicating rod. Different color blocks are indicated as the pressure changes.

The body of the external pressure display device provided by the present invention can be connected with a pneumatic tool and an air inlet pipe, and is connected to the pneumatic tool. The color indicating unit allows a user to directly use the pneumatic tool in the process of using the pneumatic tool. The change in color is used to know the current use pressure condition. Moreover, the volume of the chamber provided in the body can reduce the installation volume, which can avoid the interference of the pneumatic tool during use.

Please refer to the second to fourth figures, which provide a pressure display device 20 according to a preferred embodiment of the present invention, including:

Please refer to the second and third figures. A body 30 has a through passage 31 and a receiving chamber 32 therein; two ends of the body 30 on the passage 31 are formed with an air inlet end 33 and an air outlet end 34, respectively. The air inlet end 33 and the air outlet end 34 are in communication with the channel 31. The air inlet end 33 is a screw hole 331, and the air outlet end 34 is a hollow stud 341. The body 30 is in the air inlet. A longitudinal direction is formed between the two ends of the end 33 and the air outlet end 34, and the channel 31 and the receiving chamber 32 are arranged along the longitudinal direction of the body 30; the two ends of the receiving chamber 32 form a pressure end 321 and a pressure bearing End 322, a lateral passage 311 is laterally provided on the side wall surface of the channel 31 and the screw hole 331 of the air inlet end 33, and the side passage 311 penetrates the side of the container 32 near the pressure end 321, and the passage 31 It communicates with the container room 32 by the side passage 311. A window area 35 is provided at the position of the outside of the body 30 corresponding to the container room 32. The window area 35 is provided with an indicator that can see the container room from the outside. A window 351, and a transparent cover plate 352 is provided on the outside of the window area 35. The cover plate 352 can keep the chamber 32 airtight, and through its transparent effect, The condition of the window area 35 and the indicator window 351 can be viewed; the body 30 is provided with an assembly hole 36 on the pressure-bearing end 322 side of the container 32, and the assembly hole 36 communicates with the container 32, and the assembly hole 36 is A sealing member 361 is provided in parallel, and an O-ring or a sealant can be provided between the sealing member 361 and the assembly hole 36 to make the assembly hole 36 and the sealing member 361.

Please refer to the third and fourth figures. A pressure indicating unit 40 is disposed inside the accommodating chamber 32 and includes: an elastic element 41 and an indicating rod 42. The pressure indicating unit 40 is sequentially arranged by the assembly hole 36. It is installed in the container 32, and after the installation is completed, the sealing member 361 is put into the assembly hole 36 to form a seal; the elastic element 41 is provided on the pressure-bearing end 322 side of the container 32, and the indicator rod 42 is Connected to the elastic element 41, the elastic element 41 can provide an elastic force to the indicating rod 42; a stop block 421 is protruded from one end of the indicating rod 42 near the pressure-receiving end 322, and the stop block 421 is threaded through It is arranged on one end of the elastic element 41, and the other end of the elastic element 41 is pressed against the pressure-receiving end 322 side; the indicator rod 42 forms a pressure-receiving surface near the end of the pressure end 321 of the container 32 422, an air guiding column 422 is protruded from the pressure receiving surface 422, and the cross section of the air guiding column 422 is smaller than the pressure receiving surface 422. When no pressure is applied in the chamber 32, the elastic element 41 will indicate this When the rod 42 is pushed toward the pressure end 321, and the air guide column 422 is pressed against the pressure end 321, the height of the air guide column 422 is such that the pressure surface 422 is higher than the side At the position of the road 311, the indicating rod 42 moves longitudinally along the body 30 in the receiving chamber 32, and a part of the position of the indicating rod 42 is exposed in the indicating window 351. A sealing element 424 is set on the indicating rod 42 The sealing element 424 forms a tight contact between the receiving chamber 32 and the indicating rod 42, so that a partition is formed between the pressure end 321 and the pressure receiving end 322 of the receiving chamber 32.

Please refer to the second and fourth figures. A color indicating unit 50 is provided with a color plate 51 on the window area 35, and the color plate 51 is provided with three different color blocks 511, 512, and 513. The color blocks 511, 512, and 513 are arranged on the side of the instruction window 351. The color blocks 511, 512, and 513 are arranged in sequence with the moving direction of the indicator rod 42, and an indicator ring 42 is provided on the opposite side of the ring. Mark 52, which can be displayed in the indication window 351. In order to let the user know the pressure ranges represented by the color blocks 511, 512, and 513, a pressure correspondence table 514 is set in the window area 35. In order to display the pressure value corresponding to each color block, in this embodiment, the color block 511 corresponds to 80 PSI or less, the color block 512 corresponds to 80 PSI to 10 PSI, and the color block 513 corresponds to more than 80 PSI. For pressures above 100 PSI, the corresponding pressure value and interval can be adjusted according to the pressure of different pneumatic tools.

Please refer to the fifth figure. When in use, screw the stud 341 of the air outlet 34 into a pneumatic tool P, and screw the joint of an air inlet pipe Y into the screw hole 331 of the air inlet 33. In this way, when the intake pipe Y has a compressed air input, it can be transmitted from the intake end 33 through the channel 31 to the outlet end 34 and introduced into the pneumatic tool P; at this time, the pressure of the compressed air will pass through The side channel 311 enters the chamber 32, and the indicating rod 42 will have different positions according to the change of the air pressure. Because the pressure display device 20 is directly screwed on the rear end of the pneumatic tool P, the user can directly See the color change of the color indicating unit 50 at the bottom of the pneumatic tool P. You can directly observe the pressure change while operating the pneumatic tool P, and because the chamber 32 and the channel 31 are both set along the longitudinal direction of the body 30, the pressure is displayed. The device 20 can be arranged in a relatively small volume. When the pneumatic tool P is in operation, the pressure display device 20 will not interfere with the use.

Please refer to the diagrams in Figures 6A and 6B. When the compressed air has not been input into the channel 31 or the pressure is insufficient, in this embodiment, that is, the condition that the pressure of the input gas is lower than 80PSI, enter the side channel 311. When the gas pressure pushes the pressure surface 422 of the indicator rod 42, the generated thrust force is insufficient to overcome the elastic force of the elastic element 41. The mark 52 on the indicator rod 42 will indicate the position of the first color block 511. At this time, the user can know that the air pressure of the input pneumatic tool P is less than 80 PSI or that the compressed air has not been input.

Please refer to Figures 7A and 7B. When the compressed air is input into the normal pressure zone, in this embodiment, that is, the input gas pressure is in the range of 80PSI to 100PSI, and enters the side channel 311. The gas pressure can push the pressure receiving surface 422 of the indicating rod 42, so that the pressure of the indicating rod 42 on the pressure receiving surface 422 is slightly greater than the elastic force of the elastic element 41, and the elastic element 41 is compressed by a slight force. The stopper 421 on the indicating rod 42 has not yet reached the pressure end 322 of the container 32; at this time, the indicating rod 42 will move toward the pressure end 322, and the mark 52 on the indicating rod 42 will move to the first At the position of the two color blocks 512, the user can know that the position of the second color block 512 is the proper operating pressure, and the pneumatic tool P can be operated.

Please refer to Figures 8A and 8B. When the pressure of the compressed air input is in the overpressure section, in this embodiment, that is, the pressure of the input gas exceeds 100 PSI, the pressure system entering the channel 31 and the bypass channel 311 Greater than the operating pressure of the pneumatic tool P; at this time, the pressure of the gas entering the side channel 311 will force the pressure surface 422 of the indicator rod 42 to make the pressure of the indicator rod 42 on the pressure surface 422 greater than the elasticity The elastic force of the element 41 causes the indicator rod 42 to move further toward the pressure bearing end 322, so that the mark 52 on the indicator rod 42 will move to the third color block 513, and the user can know that in the third The position of the color blocks 513 is an over-pressure condition. At this time, the operation will be stopped to avoid danger during operation. In addition, when the indicator rod 42 is subjected to excessive pressure, its stopper 421 will be pushed to the pressure-bearing end. 322, so that the elastic element 41 can be maintained in a stable pressure state, avoiding excessive compression of the elastic element 41, and generating an excessive rebound damage indicating rod 42 when the pressure of the side channel 311 stops; and Control the finger Stroke rod 42, because no matter how much pressure is exceeded, the pressure are all over, no upward indication that the trip rod 42 can be reduced thereby reducing the space and volume are provided.

Please refer to the ninth and tenth aspects, the pressure display device 20 provided by the second embodiment of the present invention has the same structure as the previous embodiment, and the same structural parts use the same reference numerals of the previous embodiment, and will not be described again. : The color indicating unit 60 of the pressure display device 20 is a color ring 61. The color ring 61 is provided on the indicating rod 41 of the pressure indicating unit 40. The color ring 61 is provided along the moving direction of the indicating rod 42. There are three color blocks 611, 612, and 613 in different colors. Part of the color ring 61 is displayed on the instruction window 351. In order to let the user know the pressure ranges represented by the color blocks 611, 612, and 613, respectively. A pressure correspondence table 614 will be set in the window area 35 to display the pressure value corresponding to each color block. In this embodiment, the color block 611 corresponds to 80 PSI and the color block 612 corresponds to 80 PSI. To 10 PSI, and the color block 613 corresponds to a pressure of more than 100 PSI; when the indicator rod 42 changes position with different pressure, the color ring 61 will also display a different color on the indicator window 351; when The channel 31 and When the side channel 311 does not receive air pressure or insufficient pressure, that is, when the gas pressure is lower than 80 PSI, the uppermost color block 611 of the color ring 61 will be displayed on the indicator window 351; when the channel 31 and the side channel 311 flow, When the passing gas pressure is a suitable operating pressure, that is, when the gas pressure is between 80 PSI and 100 PSI, the indicating rod 42 will move slightly toward the pressure end 322 of the container 32; at this time, the middle of the color ring 61 The color block 612 will be displayed on the indication window 351; and when the channel 31 and the side channel 311 are subjected to a gas pressure exceeding the operating pressure, that is, when the gas pressure exceeds 100 PSI, the stopper 421 of the indicator rod 42 will When it reaches the pressure end 322 of the container 32, the color block 613 at the bottom of the color ring 61 will be displayed on the indication window 351, and the user can display the color ring 61 on the indication window 351. Color block 611, 612 or 613 to determine whether the current gas pressure is sufficient or exceeds the setting. In order to make the indication clearer, the color indicating unit 60 is provided with a mark 62 at the position of the window area 35 near the indication window 351, and the position of the color ring 61 currently indicated can be more clearly known through the position of the mark 62.

Compared with the conventional pressure gauge display, the external pressure display device provided by the present invention can be directly connected to the bottom of a pneumatic tool, so that the color indicating unit can be easily read; In the longitudinal direction of the body, the volume can be reduced without affecting the operation of the pneumatic tool P.

10‧‧‧Pressure gauge

20‧‧‧Pressure display device

30‧‧‧ Ontology

31‧‧‧channel

311‧‧‧bypass

32‧‧‧capacity room

321‧‧‧Pressing end

322‧‧‧Pressure end

33‧‧‧Air inlet

331‧‧‧screw holes

34‧‧‧ Outlet

341‧‧‧Stud

35‧‧‧window area

351‧‧‧Indication window

352‧‧‧ Cover

36‧‧‧Assembly hole

361‧‧‧seals

40‧‧‧Pressure indication unit

41‧‧‧Elastic element

42‧‧‧ indicating stick

421‧‧‧stop

422‧‧‧Pressed surface

423‧‧‧Air column

424‧‧‧sealing element

50‧‧‧ color indicator unit

51‧‧‧color board

511‧‧‧ color blocks

512‧‧‧ color blocks

513‧‧‧ color blocks

514‧‧‧Pressure correspondence table

52‧‧‧

60‧‧‧color indicator unit

61‧‧‧color ring

611‧‧‧ color blocks

612‧‧‧color blocks

613‧‧‧color blocks

614‧‧‧Pressure correspondence table

62‧‧‧ instructions

P‧‧‧Pneumatic tools

Y‧‧‧ intake pipe

In order to enable your reviewing committee to further understand the purpose, features, and effects achieved by the present invention, the following two preferred embodiments are described in detail below in conjunction with the drawings. Among them: The first picture is a conventional external pressure gauge. Appearance. The second figure is a perspective external view of an external pressure display device according to a preferred embodiment of the present invention. The third figure is a cross-sectional view of an external pressure display device according to a preferred embodiment of the present invention. The fourth figure is an exploded perspective view of an external pressure display device according to a preferred embodiment of the present invention. The fifth figure is a cross-sectional view of a preferred embodiment of the present invention connected to a pneumatic tool. The sixth A to B diagrams are an external view and a cross-sectional view of an external pressure display device when it is not under pressure in a preferred embodiment of the present invention. The seventh A to B diagrams are an external view and a cross-sectional view of the external pressure display device when the pressured state is the working pressure according to a preferred embodiment of the present invention. The eighth diagrams A to B are an external view and a cross-sectional view of an external pressure display device when the pressured state of the externally connected pressure display device is overpressure. The ninth figure is an external view and a cross-sectional view of a second preferred embodiment of the present invention when the external pressure display device is not under pressure. The tenth figure is a three-dimensional external view of a color ring around the indicator rod ring according to the second preferred embodiment of the present invention.

Claims (10)

An external pressure display device includes: a body having a through channel and a chamber therein; the body is provided with an air inlet end and an air outlet end at both ends of the channel, and the air inlet end and the air outlet end It is in communication with the channel; both ends of the chamber have a pressure end and a pressure-bearing end, the channel and the chamber are connected by a side channel; a window area is provided on the outside of the body and corresponds to the chamber At the position of the room, the window area is provided with an indicating window which can see the container room from the outside; a pressure indicating unit, which is arranged inside the container room, has: an elastic element and an indicator rod; the elastic element is provided At the pressure-bearing end side of the container, the indicator rod is connected to the elastic element, and the elastic element can provide the elastic force of the indicator rod toward the pressure end; the indicator rod forms an end side of the pressure end. Pressure surface, the pressure surface can accept air pressure from the side channel, the indicator rod can move in the container, and the local position of the indicator rod will be exposed in the indicator window; a color indicator unit, Assume There is at least two color blocks between the window portion and the indicating rod, and the color indicating unit will display different color blocks as the pressure changes. The external pressure display device according to claim 1, wherein the color indicating unit is a color plate provided on the window portion, the color plate is near the periphery of the indicating window, and along the There are at least two different color blocks in the moving direction, and a sign is provided on the indicating rod of the pressure indicating unit, and the sign indicates different color blocks as the pressure changes. The external pressure display device according to claim 1, wherein the color indicating unit is a color ring, and the color ring is provided on the circumference of the indicating rod, and the color ring is provided along the moving direction of the indicating rod. At least two different color blocks, the color ring will display different color blocks in the indication window as the pressure changes. The external pressure display device according to claim 3, wherein the color indicating unit is provided with a mark near the side of the indicating window in the window area. The external pressure display device according to claim 1, wherein one end of the indicator rod and the elastic element is convexly provided with a stopper, one end of the elastic element is sleeved on the stopper, and the other end is abutted against At the pressure-bearing end of the chamber. The external pressure display device according to claim 1, wherein the indicating rod is provided with a gas guide column protruding from the pressure surface side; the cross section of the gas guide column is smaller than the pressure surface, and the pressure surface of the indicator rod is not Before being compressed, the length of the air guiding column will make the height of the compressed surface in the chamber higher than the side channel. The external pressure display device according to claim 1, wherein the air outlet end is formed as a hollow stud, the air inlet end is recessed as a screw hole, and the side channel is continuously provided on the air inlet end. Screw hole side wall. The external pressure display device according to claim 1, wherein a longitudinal direction is formed between the air inlet end and the air outlet end of the body, and the channel and the chamber are arranged along the longitudinal direction of the body; the side channel is transverse Located between the passage and the chamber. The external pressure display device according to any one of claims 1 to 4, wherein the color indicating unit is provided with a pressure correspondence table on the window area, and the pressure correspondence table can indicate the pressure interval corresponding to the color blocks. . The external pressure display device according to claim 1, wherein the body is provided with an assembling hole, the assembling hole communicates with the accommodating chamber, the pressure indicating unit is inserted into the accommodating chamber through the assembling hole, and the assembling A seal is screwed into the hole.