TWI647433B - Pressure gauge - Google Patents

Abstract

The invention provides a pressure gauge comprising a body, a first dial, a second dial, a reduction gear train and a pressure sensing group, the body comprising a connecting portion adapted to connect the pressure source and a chamber connecting the connecting portion, A dial is disposed on one side of the body and includes a first pointer and a first scale. The second dial is disposed on the other side of the body and includes a second pointer and a second scale different from the first scale. The first pointer and the second pointer are connected to the chamber, and the pressure sensing group is disposed in the chamber and includes an elastic member of the plug member and the biasing plug member. The plug member can be pushed by the pressure medium to compress the elastic member, and the plug member is interlocked. The reduction gear train drives the first pointer and the second pointer to rotate, and the different pressure scales are displayed by the simple structure to facilitate the interpretation.

Description

Pressure gauge

The invention mainly discloses a pressure gauge, in particular to a pressure gauge capable of displaying different pressure scales on both sides and having a simple structure.

The Republic of China Invention Patent Publication No. I336396 discloses a pressure gauge that can display different pressures on both sides, and mainly includes a joint having a body and a Bourdon tube, a first dial having a large pressure scale, and a smaller The first dial of the pressure scale and the reduction gear train are coupled to the reduction gear train by the Baden tube to simultaneously drive the pointers on the first dial and the second dial.

However, the above-mentioned pressure gauge uses a C-type Baden tube, which has a complicated structure and a high manufacturing cost.

In view of the above problems of the prior art, which cannot be effectively solved and overcome, the present applicant has filed this patent application to solve the aforementioned problems.

The technical problem to be solved by the pressure gauge of the present invention is that the pressure gauge structure using the Baden tube is relatively complicated and the manufacturing cost is high.

Accordingly, the present invention provides a pressure gauge including a body, a first dial, a second dial, a reduction gear train, and a pressure sensing set, the body including a first side, a opposite to the a second side of the first side, a connecting portion adapted to connect to the pressure source, and a chamber communicating with the connecting portion, the first dial being disposed on the first side and including a first pointer and a first moment The second dial is disposed on the second side and includes a second pointer and a second scale different from the first scale. The reduction gear is disposed in the chamber and can interlock the first pointer with The second pointer, the pressure sensing group is disposed in the chamber and includes a plug member and an elastic member biasing the plug member, the plug member being capable of being pressed by the pressure medium to compress the elastic member, the plug member interlocking The reduction gear train drives the first pointer and the second pointer to rotate.

The technology, means and functions of the present invention are described in detail with reference to the accompanying drawings.

Referring to FIGS. 1 to 5 , the pressure gauge 1 of the present invention includes a body 10 , a first dial 20 , a second dial 30 , a reduction gear train 40 , and a pressure sensing group 50 .

The body 10 includes a first side 11 , a second side 12 opposite to the first side 11 , a connecting portion 13 adapted to connect the pressure source, a chamber 14 connected to the connecting portion 13 , and a chamber 14 disposed in the chamber 14 . The positioning member 15 includes a first protective sheet 16 disposed on the first side 11 , a retainer 17 disposed on the first side 11 , and a second protective sheet 18 disposed on the second side 12 . In the present embodiment, as shown in FIG. 1, the pressure source can be an inflator 2, and the connecting portion 13 is rotatably connected to the inflator 2, so that the pressure gauge 1 can be opposite to the inflator 2 in the first position and the second position. In the inter-transformation, when the pressure gauge 1 is in the first position, the first side 11 is facing upward; conversely, when the pressure gauge 1 is in the second position, the second side 12 is facing upward. In addition, it can be understood that when the connecting portion 13 is connected to the inflator 2, and the inflator 2 is connected to the inflated object, the connecting portion 13, the chamber 14, the passage for supplying air in the inflator 2, and the object to be inflated Together, they form an equal pressure zone, and the compressed air generated by the pump 2 can enter the chamber 14 via the connecting portion 13. The locating member 15 has a receiving hole 151 that communicates with the connecting portion 13. The receiving hole 151 defines an opening 152 on the outer peripheral surface of the positioning member 15. The first protective sheet 16 and the second protective sheet 18 are respectively made of a see-through material.

The first dial 20 is disposed on the first side 11 of the body 10, and the first protection sheet 16 faces the first dial 20 and is disposed between the first dial 20 and the retainer 17. The first dial 20 includes a first pointer 21 and a first scale 22. In this embodiment, the first scale 22 can be divided into 20 grid units.

The second dial 30 is disposed on the second side 12 of the body 10, and the second protective sheet 18 faces the second dial 30. The second dial 30 includes a second pointer 31 and a second scale 32 different from the first scale 22. In this embodiment, the second scale 32 can be divided into 15 grid units.

The reduction gear train 40 is disposed in the chamber 14 of the body 10 and can cooperatively connect the first pointer 21 of the first dial 20 with the second pointer 31 of the second dial 30. The reduction gear train 40 includes a first shaft member 41 that connects the first pointer 21 and a second shaft member 42 that connects the second pointer 31. The first shaft member 41 and the second shaft member 42 are rotatably worn along different axes, respectively. The first shaft member 41 includes a first gear 411 and a second gear 412. The second shaft member 42 includes a third gear 421 that engages the first gear 411. In the embodiment, the modulus of the first gear 411 can be smaller than the second gear 412.

The pressure sensing group 50 is disposed in the receiving hole 151 via the opening 152. The pressure sensing group 50 includes a plug member 51 movably disposed in the receiving hole 151, an elastic member 52 of the biasing plug member 51, and a Cover member 53. The plug member 51 can be driven by the pressure medium to slide relative to the accommodating hole 151 to compress the elastic member 52. The plug member 51 interlocks with the reduction gear train 40 to drive the first pointer 21 and the second pointer 31 to rotate. In the present embodiment, the plug member 51 is capable of being compressed by the compressed air entering the chamber 14 via the connecting portion 13 to compress the elastic member 52. The plug member 51 includes a tooth 511 that engages the second gear 412, a body portion 512 and an extension portion 513 of the connecting body portion 512. In this embodiment, the extension portion 513 can be integrally connected to the body portion 512, the body portion 512. The extending portions 513 are spaced apart from each other and the extending directions are parallel to each other, and the teeth 511 are integrally formed on the extending portion 513. The elastic member 52 is elastically disposed between the plug member 51 and the cover member 53. The cover member 53 is detachably coupled to the receiving hole 151 to selectively close the opening 152.

With the above configuration, when the pressure gauge 1 is in the first position (as shown in FIG. 4), that is, the first side 11 of the body 10 faces upward. The plug member 51 is pushed by the compressed air from the inflator 2 to slide relative to the receiving hole 151 and compress the elastic member 52. At this time, the teeth 511 of the plug member 51 drive the second gear 412 of the first shaft member 41 to make the first The shaft member 41 drives the first pointer 21 of the first dial 20 to rotate clockwise and displays the pressure value on the first scale 22. At the same time, the first gear 411 of the first shaft member 41 drives the third gear 421 of the second shaft member 42, so that the second shaft member 42 drives the second pointer 31 of the second dial 30 to rotate counterclockwise.

When the user flips the pressure gauge 1 relative to the inflator 2 to the second position (as shown in FIG. 5), that is, the second side 12 of the body 10 faces upward, at this time, the second shaft member 42 drives the second dial 30. The two hands 31 become clockwise and display the pressure value on the second scale 32. Similarly, the first shaft member 41, which is shifted to the lower side, drives the first hand 21 of the first dial 20 to rotate counterclockwise. That is, as long as the first dial 20 or the second dial 30 faces upward for recognizing the pressure value, the first pointer 21 or the second pointer 31 are all rotated clockwise, so that the first pointer 21 can be immediately judged by the user when viewing. Or the pressure value indicated by the second pointer 31 without confusion.

In summary, it can be concluded that the pressure gauge 1 of the present invention has the following advantages:

1. The pressure sensing group 50 includes a plug member 51 and an elastic member 52 of the biasing plug member 51, so that the plug member 51 can be pushed by the pressure medium to compress the elastic member 52. The plug member 51 interlocks with the reduction gear train 40 to drive the first pointer. The rotation of the 21 and the second pointer 31 provides a structure different from that of the conventional Baden tube type pressure gauge, achieving the structure simple and reducing the manufacturing cost.

2. By the configuration of the reduction gear train 40, when the user views the first dial 20 or the second dial 30, the first pointer 21 or the second pointer 31 rotates clockwise for the user to watch. There will be no confusion.

3. The first scale 22 is divided into 20 grid unit scales, and the second scale 32 is divided into 15 grid unit scales. When the user measures a large pressure value, the first dial 20 can be accurately obtained. The measured value; conversely, when the user measures the smaller pressure value, the second dial 30 can be used to obtain a more accurate measurement value. The first scale 22 and the second scale 32 are different by the unit scale of the scribe, so that the user can selectively view the scale value which is easier to read, and more accurately determine the pressure value without the occurrence of a misjudgment. .

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, so that the numerical values are changed or the equivalent elements are replaced, or the equivalent changes are made according to the scope of the present invention. Modifications should still fall within the scope of the invention patent.

1‧‧‧ pressure gauge

10‧‧‧ Ontology

11‧‧‧ first side

12‧‧‧ second side

13‧‧‧Connecting Department

14‧‧‧ chamber

15‧‧‧ Positioning parts

151‧‧‧ accommodating holes

152‧‧‧ openings

16‧‧‧First Protection Film

17‧‧‧ retaining ring

18‧‧‧Second protective film

20‧‧‧First dial

21‧‧‧ first pointer

22‧‧‧ first scale

30‧‧‧second dial

31‧‧‧second pointer

32‧‧‧second scale

40‧‧‧Reduction gear train

41‧‧‧First shaft

411‧‧‧First gear

412‧‧‧second gear

42‧‧‧Second shaft parts

421‧‧‧ Third gear

50‧‧‧ Pressure Sensing Group

51‧‧‧plugs

511‧‧‧ teeth

512‧‧‧ Body

513‧‧‧Extension

52‧‧‧Flexible parts

53‧‧‧Cleaning pieces

2‧‧‧Inflator

Figure 1 is a perspective view of the pressure gauge of the present invention, showing that the pressure gauge is rotatably connected to the pump; Figure 2 is an exploded view of the pressure gauge shown in Figure 1; Figure 3 is another pressure gauge of Figure 1. An angle exploded view; FIG. 4 is a cross-sectional view of FIG. 1 showing the pressure gauge in a first position relative to the inflator; FIG. 5 is another cross-sectional view of FIG. 1 showing the pressure gauge in a second position relative to the inflator.

Claims (9)

A pressure gauge comprising: a body, the body comprising a first side, a second side opposite to the first side, a connecting portion adapted to connect to the pressure source, and a chamber communicating with the connecting portion; a first dial, the first dial is disposed on the first side and includes a first pointer and a first scale; a second dial, the second dial is disposed on the second side and includes a second pointer and a second scale different from the first scale; a reduction gear train, the reduction gear is disposed in the chamber and can interlock the first pointer and the second pointer, the reduction gear train includes a first shaft member connecting the first pointer and a second shaft member connecting the second pointer, the first shaft member includes a first gear and a second gear, and the second shaft member includes a meshing portion a third gear of a gear; and a pressure sensing group disposed in the chamber and including a plug member and an elastic member biasing the plug member, the plug member including a second gear engaged a row of teeth that can be pushed by a pressure medium to compress the elastic member, the plug member Moving the reduction gear train to drive the rotation of the first pointer and the second pointer. The pressure gauge of claim 1, wherein the modulus of the first gear is less than the modulus of the second gear. The pressure gauge of claim 2, wherein the body comprises a positioning member disposed in the chamber, the first shaft member and the second shaft member are rotatably disposed through the positioning member, and the positioning member has a connection The plug is movably disposed in the receiving hole through the receiving hole of the connecting portion. The pressure gauge of claim 3, wherein the receiving hole forms an opening in the outer peripheral surface of the positioning member, and the pressure sensing group is disposed in the receiving hole through the opening, the pressure sensing group includes a a cover member detachably coupled to the receiving hole to selectively close the opening, the elastic member being elastically disposed between the plug member and the cover member. The pressure gauge according to any one of claims 1 to 4, wherein the plug member comprises a body portion and an extension portion connecting the body portion, the body portion and the extension portion are spaced apart from each other and extend in a direction parallel to each other, the row Teeth are formed on the extension. The pressure gauge of claim 1, wherein the first scale is divided into 20 grid units. The pressure gauge of claim 1, wherein the second scale is divided into 15 grid units. The pressure gauge of claim 1, wherein the body comprises a first protective sheet and a retaining ring, wherein the first protective sheet and the retaining ring are disposed on the first side, and the first protective sheet faces The first dial is disposed between the first dial and the retainer. The pressure gauge of claim 1, wherein the body comprises a second protective sheet that is fluoroscopically disposed, the second protective sheet being disposed on the second side, the second protective sheet facing the second dial.