TW202022337A - External pressure display device including a body, a window area, a pressure indicating unit and a color indicating unit - Google Patents

Abstract

An external pressure display device includes: a body provided therein with a through passage and a chamber, the passage communicating with the chamber through a side passage; a window area provided on the outside of the body at a position corresponding to the chamber, the window area being provided with an indicator window through which the chamber can be seen from the outside; a pressure indicating unit, which is arranged inside the chamber and includes an elastic element and an indicator rod, wherein the elastic element can provide an elastic force to the indicator rod, a pressure receiving surface is formed on one end of the indicator rod, and the pressure receiving surface can receive the air pressure from the side passage; a color indicating unit which is arranged between the window portion and the indicator rod, includes at least two color blocks which can generate displays of different color blocks in response to the pressure changes, and can be connected to the bottom of a pneumatic tool and generate indication of pressure changes through colors.

Description

External pressure display device

The present invention is related to a pressure display device, in particular to an external pressure display device that connects an air inlet pipe and a pneumatic tool and can provide a pressure display function.

General pneumatic tools are mainly driven by the air pressure generated by compressed gas to actuate the pneumatic tools. The operation of pneumatic tools requires stable compressed gas pressure. When the compressed gas pressure is insufficient, the effectiveness of the pneumatic tools will be insufficient ; But if the pressure of the compressed gas is too high, it will exert too much force or cause damage to the internal parts of the pneumatic tool; in order to monitor the inlet pressure of the pneumatic tool, some pneumatic tools will be equipped with a pressure display device inside, Let the user know the pressure of the compressed gas currently injected through the air pressure display device. For some pneumatic tools, in order to save costs or their structure is limited, the pneumatic tool cannot be equipped with a pressure display device. Please refer to the first figure. The user will connect a pressure gauge 10 externally, which can be provided A gas pressure display function: through the external connection of the pressure gauge, the user can easily check the current pressure value.

However, the general pressure gauge 10 has a large-volume round surface. During use, its surface is too large to cause obstacles to the user, which may cause jamming during movement, or affect the grip when holding it. Pneumatic tools, such an external structure can provide a pressure display effect, but it will affect the smoothness of the 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 in use around the pneumatic tool. It is not ideal, but it is necessary to modify it.

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

The second objective 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 and does not affect the operator of the pneumatic tool.

In order to achieve the above objective, the present invention provides an external pressure display device, which includes: a body with a through passage and a chamber inside; the body is provided with an inlet end and an outlet at both ends of the passage respectively The inlet end and the outlet end are in communication with the passage; both ends of the chamber have a pressure end and a pressure end. The passage and the pressure end side of the chamber form a side passage, the The passage and the chamber are connected by a side passage; a window area is located on the outside of the body corresponding to the position of the chamber, and the window area is provided with an indicator window that can see through the chamber; a pressure indicator unit , Which is arranged inside the chamber, and has: an elastic element and an indicator rod; the elastic element is arranged on the pressure-bearing end side of the chamber, the indicator rod is connected with the elastic element, and the elastic element It can provide an elastic force of the indicator rod toward the pressure end; the indicator rod forms a pressure surface on the end side of the pressure end, and the pressure surface can receive the air pressure from the bypass channel. The chamber moves, and the local position of the indicator rod will be exposed in the indicator window; A color indicator unit is arranged between the window portion and the indicator rod and has at least two color blocks. The color indicator unit Different color blocks will be displayed as the pressure changes.

Preferably, the color indicator unit is a color plate, the color plate is arranged on the window portion, the color plate is close to the periphery of the indicator window, and has at least two different color blocks along the moving direction of the indicator rod, The indicator rod of the pressure indicator unit is provided with a mark, and the mark indicates different color blocks as the pressure changes.

Preferably, the color indicator unit is a color ring, the color ring is arranged around the circumference of the indicator rod, the color ring has at least two different color blocks along the moving direction of the indicator rod, and the window portion Indicate different color blocks 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 indicator unit allows the user to directly use the pneumatic tool. The current pressure status can be known through the change of color, and the chamber provided in the body can reduce the installation volume, which can avoid the interference of pneumatic tools during use.

Please refer to Figures 2 to 4, which provide a pressure display device 20 according to a preferred embodiment of the present invention, which includes:

Please refer to Figures 2 and 3, a body 30 has a through passage 31 and a chamber 32 inside; the body 30 has an inlet end 33 and an outlet end 34 formed at both ends of the passage 31, respectively The inlet end 33 and the outlet end 34 communicate with the passage 31, the inlet end 33 is a screw hole 331, and the outlet end 34 forms a hollow stud 341; the body 30 is connected to the inlet A longitudinal direction is formed between the two ends of the end 33 and the outlet end 34, and the passage 31 and the chamber 32 are arranged along the longitudinal direction of the body 30; the two ends of the chamber 32 form a pressure end 321 and a pressure bearing end 321 At the end 322, the passage 31 and the side wall of the screw hole 331 of the inlet end 33 are transversely provided with a side passage 311, the side passage 311 is penetrated on the side of the chamber 32 near the pressure end 321, the passage 31 The chamber 32 is connected to the chamber 32 by the side passage 311; a window area 35 is provided on the outside of the main body 30 at a position corresponding to the chamber 32, and the window area 35 is provided with an indication that the chamber can be seen through from outside Window 351. A transparent cover plate 352 is provided outside the window area 35. The cover plate 352 can keep the chamber 32 airtight, and through its transparent effect, the status of the window area 35 and the indicator window 351 can still be seen; The body 30 is provided with an assembly hole 36 on the side of the pressure-bearing end 322 of the chamber 32. The assembly hole 36 communicates with the chamber 32. A seal 361 is screwed on the assembly hole 36. The seal 361 is connected to the Facilities such as O-rings or sealant can be arranged between the assembly holes 36 to make the assembly holes 36 and the seal 361.

Please refer to Figures 3 and 4, a pressure indicating unit 40 is arranged inside the chamber 32, which has: an elastic element 41 and an indicating rod 42, the pressure indicating unit 40 is sequentially formed by the assembly hole 36 Installed into the chamber 32, after the installation is completed, the sealing member 361 is placed in the assembly hole 36 to form a seal; the elastic element 41 is arranged on the side of the pressure-bearing end 322 of the chamber 32, and the indicator bar 42 is Connected to the elastic element 41, the elastic element 41 can provide an elastic force to the indicating rod 42; an end of the indicating rod 42 near the pressure-bearing end 322 is protrudingly provided with a stop block 421 through which the stop block 421 passes Set at one end of the elastic element 41, and the other end of the elastic element 41 is pressed against the pressure-bearing end 322 side; the indicator rod 42 forms a pressure-receiving surface on the end side of the pressure end 321 close to the chamber 32 422. An air guide post 422 protrudes from the pressure surface 422. The cross section of the air guide post 422 is smaller than the pressure surface 422. When the chamber 32 is not under pressure, the elastic element 41 will indicate When the rod 42 is pushed toward the pressure end 321 and the air guide post 422 is against the pressure end 321, the height of the air guide post 422 makes the pressure surface 422 higher than the position of the bypass channel 311, and the indicator bar 42 is in the housing The interior of the chamber 32 moves along the longitudinal direction of the main body 30, and the local position of the indicator rod 42 will be exposed in the indicator window 351; the indicator rod 42 is sheathed with a sealing element 424, the sealing element 424 makes the chamber 32 A tight fit is formed with the indicator rod 42 to form a partition between the pressure end 321 and the pressure end 322 of the chamber 32.

Please refer to Figures 2 and 4, a color indicating unit 50. A color plate 51 is provided on the window area 35. The color plate 51 is also provided with three different color blocks 511, 512, and 513. The color blocks 511, 512, and 513 are arranged on the side of the indicator window 351. The color blocks 511, 512, and 513 are arranged in sequence with the moving direction of the indicator rod 42. The indicator rod 42 is provided with an opposite ring Mark 52. The mark 52 can be displayed in the indicator window 351. In order to let the user know the pressure ranges represented by the color blocks 511, 512, 513, respectively, a pressure corresponding table 514 is set in the window area 35. To display the pressure value corresponding to each color block, in this embodiment, the color block 511 corresponds to below 80 PSI, the color block 512 corresponds to between 80 PSI and 10 PSI, and the color block 513 corresponds to more than 80 PSI. For pressures above 100PSI, the corresponding pressure value and interval can be adjusted according to the pressure of different pneumatic tool operations.

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 connector 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 to the outlet end 34 through the passage 31 and introduced into the pneumatic tool P; at this time, the pressure of the compressed air will pass through When the bypass channel 311 enters the chamber 32, the indicator rod 42 will change in different positions with 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 The color change of the color indicating unit 50 can be seen at the bottom of the pneumatic tool P, and the pressure change can be directly observed while operating the pneumatic tool P, and because the chamber 32 and the channel 31 are both arranged along the longitudinal direction of the body 30, the pressure is displayed The device 20 can be arranged in a smaller volume, and when the pneumatic tool P is in operation, the pressure display device 20 will not interfere with the use.

Please refer to Figures 6A and 6B. When the compressed air has not yet been fed into the channel 31 or the pressure is insufficient, in this embodiment, that is, when the input gas pressure is lower than 80 PSI, the air entering the bypass channel 311 When the gas pressure pushes the pressure surface 422 of the indicator rod 42, the thrust generated by it is not enough 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 input to the 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 section of normal operating pressure, in this embodiment, that is, the input gas pressure is within the range of 80PSI to 100PSI, and enters the bypass channel 311 The gas pressure can push the pressure surface 422 of the indicator rod 42 so that the pressure on the pressure surface 422 of the indicator rod 42 is slightly greater than the elastic force of the elastic element 41, so that the elastic element 41 is slightly compressed and compressed. The stop block 421 on the indicator rod 42 has not yet pushed to the pressure end 322 of the chamber 32; at this time, the indicator rod 42 will move toward the pressure end 322, and the mark 52 on the indicator 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 can operate the pneumatic tool P.

Please refer to Figures 8A and 8B. When the compressed air input pressure is in the overpressure section, in this embodiment, that is, the input gas pressure exceeds 100 PSI, the pressure system entering the channel 31 and the bypass channel 311 Is greater than the operating pressure of the pneumatic tool P; at this time, the gas pressure entering the bypass channel 311 will force the pressure surface 422 of the indicator rod 42 to make the pressure surface 422 of the indicator rod 42 bear more pressure than the elasticity With the elastic force of the element 41, the indicator rod 42 will move further toward the pressure-bearing end 322, so that the mark 52 on the indicator rod 42 will move to the position of the third color block 513. The user can know that The position of each color block 513 is an overpressure condition, and the operation will be stopped at this time to avoid danger during operation; in addition, when the indicator rod 42 is subjected to excessive pressure, the stop block 421 will be held to the pressure end 322. The elastic element 41 can be maintained in a stable compressed state, which can avoid excessive compression of the elastic element 41, and cause excessive rebound damage to the indicator rod 42 when the pressure of the bypass channel 311 stops; and The stroke of the indicator rod 42 is controlled, because no matter how much the pressure is exceeded, the pressure is exceeded, and there is no need to indicate upwards. The stroke of the indicator rod 42 can be reduced to reduce the installation space and volume.

Please refer to the ninth and tenth figures, which are the pressure display device 20 provided by the second embodiment of the present invention. Its structure is the same as that of the previous embodiment. The same structural parts use the reference numerals of the previous embodiment and will not be repeated. : The color indicator unit 60 of the pressure display device 20 is a color ring 61, the color ring 61 is set on the indicator rod 41 of the pressure indicator unit 40, and the color ring 61 is set along the direction in which the indicator rod 42 moves There are three different colors of color blocks 611, 612, 613, and part of the color ring 61 will be displayed on the indicator window 351, in order to let the user know the pressure range represented by the color blocks 611, 612, 613 respectively , A pressure corresponding table 614 is 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 80PSI or less, and the color block 612 corresponds to 80PSI The color block 613 corresponds to a pressure above 100 PSI; when the indicator bar 42 changes position with different pressures, the color ring 61 will also display a different color on the indicator window 351; When the channel 31 and the bypass channel 311 are not receiving air pressure or the pressure is insufficient, that is, when the gas pressure is lower than 80 PSI, the color block 611 at the top of the color ring 61 will be displayed on the indicator window 351; when the channel 31 and When the pressure of the gas flowing through the bypass channel 311 is at the proper operating pressure, that is, when the gas pressure is between 80 PSI and 100 PSI, the indicator bar 42 will slightly move toward the pressure-bearing end 322 of the chamber 32; at this time, the The color block 612 in the middle of the color ring 61 will be displayed on the indicator window 351; and when the passage 31 and the bypass passage 311 are subjected to gas pressure exceeding the operating pressure, that is, when the gas pressure exceeds 100 PSI, the indicator stick 42 stops The stopper 421 will push against the pressure-bearing end 322 of the chamber 32. At this time, the color block 613 at the bottom of the color ring 61 will be displayed on the indicator window 351, and the user can use the color ring 61 in the indicator window The color blocks 611, 612, or 613 displayed on the 351 determine whether the current gas pressure is sufficient or exceeds the setting. In order to make the indication more clear, the color indicating unit 60 is provided with a mark 62 at the position of the window area 35 close to the indicating window 351, and the position of the indicating color ring 61 can be more clearly known through the position of the mark 62.

The externally connected pressure display device provided by the present invention is compared with the display of the conventional pressure gauge, except that it can be directly connected to the bottom of the pneumatic tool, so that the color indicator unit can be easily read; the body channel and the chamber are provided 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: body 31: Channel 311: Bypass 32: Room 321: Pressure End 322: Pressure End 33: intake end 331: screw hole 34: exhaling end 341: Stud 35: Window area 351: indicator window 352: cover 36: assembly hole 361: Seal 40: Pressure indicating unit 41: Elastic element 42: indicator stick 421: Stop Block 422: Pressure Surface 423: air guide column 424: sealing element 50: Color indicator unit 51: color board 511: color block 512: color block 513: color block 514: Pressure Correspondence Table 52: marking 60: Color indicator unit 61: color ring 611: color block 612: color block 613: Color block 614: Pressure Correspondence Table 62: instructions P: Pneumatic tool Y: intake pipe

In order to enable your reviewer to further understand the purpose, features, and effects of the present invention, two preferred embodiments are listed below, which are described in detail in conjunction with the drawings. The first figure is the external pressure gauge connected to the conventional one. Appearance drawing. The second figure is a perspective 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 a three-dimensional exploded view of the external pressure display device of a preferred embodiment of the present invention. The fifth figure is a cross-sectional view of a preferred embodiment of the present invention connected with a pneumatic tool. The sixth figures A to B are the appearance and cross-sectional views of the external pressure display device of a preferred embodiment of the present invention when it is not under pressure. The seventh figures A to B are the appearance and cross-sectional views of a preferred embodiment of the external pressure display device when the pressure state is working pressure. The eighth figures A to B are the external view and cross-sectional view of a preferred embodiment of the external pressure display device when the pressure state is overpressure. The ninth figure is an external view and a cross-sectional view of the external pressure display device of the second preferred embodiment of the present invention when it is not under pressure. The tenth figure is a perspective view of the second preferred embodiment of the present invention with a color ring around the indicator bar.

20: Pressure display device

30: body

31: Channel

32: Room

34: exhaling end

341: Stud

35: Window area

351: indicator window

352: cover

361: Seal

40: Pressure indicating unit

41: Elastic element

42: indicator stick

421: Stop Block

422: Pressure Surface

423: air guide column

424: sealing element

50: Color indicator unit

51: color board

511: color block

512: color block

513: color block

52: marking

Claims (10)

An external pressure display device includes: a body with a through channel and a chamber inside; the body is provided with an inlet end and an outlet end at both ends of the channel, the inlet end and the outlet end Is connected to the channel; the two ends of the chamber have a pressure end and a pressure end; the channel and the chamber are connected by a side channel; a window area is provided on the outside of the body corresponding to the chamber At the location of the chamber, the window area is provided with an indicator window that can see through the chamber from the outside; a pressure indicating unit, which is located inside the chamber, and has: an elastic element and an indicator rod; the elastic element is provided On the pressure-bearing end side of the chamber, the indicator rod is connected to the elastic element, and the elastic element can provide an elastic force of the indicator rod toward the pressure end; the indicator rod forms a side at the pressure end The pressure surface, the pressure surface can accept the air pressure from the side channel, the indicator rod can move in the chamber, and the local position of the indicator rod will be exposed in the indicator window; a color indicator unit, It is arranged between the window part and the indicator bar and has at least two color blocks. The color indicating unit will display different color blocks according to pressure changes. The external pressure display device according to claim 1, wherein the color indicator unit is a color plate, the color plate is arranged on the window portion, the color plate is close to the periphery of the indicator window, and is along the line of the indicator rod The moving direction has at least two different color blocks, and the indicator rod of the pressure indicating unit is provided with a mark, and the mark indicates different color blocks according to the pressure change. The external pressure display device according to claim 1, wherein the color indicator unit is a color ring, the color ring is arranged around the circumference of the indicator rod, and the color ring has a movement direction along the indicator rod. At least two different color blocks, the color ring will display different color blocks in the indicator window as the pressure changes. According to claim 3, the external pressure display device, wherein the color indicator unit is provided with a mark on the side of the window area near the indicator window. According to claim 1, the external pressure display device, wherein one end of the indicator rod connected with the elastic element is protruded with a stop block, one end of the elastic element is sleeved on the stop block, and the other end abuts against At the pressure end of the chamber. The external pressure display device of claim 1, wherein the indicator rod is provided with an air guide column protruding from the pressure surface side; the cross section of the air 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 guide column will make the pressure surface located at the height of the chamber higher than the bypass channel. The external pressure display device according to claim 1, wherein the outlet end is formed as a hollow stud, the inlet end is recessed as a screw hole, and the bypass passage is formed through the inlet end Screw hole side wall. The external pressure display device according to claim 1, wherein a longitudinal direction is formed between the inlet end and the outlet end of the main body, and the passage and the chamber are arranged along the longitudinal direction of the main body; the bypass channel is horizontal Set between the passage and the chamber. The external pressure display device according to any one of claim 1 to 4, wherein the color indicating unit is provided with a pressure corresponding meter on the window area, and the pressure corresponding meter 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 assembly hole, the assembly hole communicates with the chamber, the pressure indicating unit is inserted into the chamber through the assembly hole, and the assembly A seal is screwed into the hole.

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