Digital multimeter for fuel cell inspection

Abstract

The utility model discloses a digital multimeter for fuel cell inspection, which comprises a multimeter main body and a wind-up roller, the wind-up roller is positioned on the surface of the multimeter main body, an elastic belt is arranged outside the wind-up roller, and one side of the elastic belt opposite to the wind-up roller is fixedly connected with a connecting roller. According to the scheme, when an operator uses the universal meter, the elastic belt is pulled, at the moment, the winding roller rotates together with the connecting disc, the torsion spring is twisted, then the hand can be placed between the universal meter body and the elastic belt, and then the elastic structure of the torsion spring is used for driving the connecting disc to rotate and reset; the adjusting process can be completed by pulling the elastic belt, self-adaptive adjustment of the elastic belt is achieved, the adjusting process is simplified, the device is suitable for users of different hand shapes, the elastic belt can be conveniently and integrally replaced in the follow-up process through the mode that the elastic piece is matched with the clamping connection, and the practicability of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of multimeter technology, and more specifically, to a digital multimeter for fuel cell inspection. Background Technology

[0002] Digital multimeters are typically used to measure the current of fuel cells during inspections. Traditional digital multimeters are bulky and difficult to handle, making them inconvenient for users to carry and staff.

[0003] To address the aforementioned issues, patent document publication number CN221224844U discloses a portable digital multimeter, comprising a multimeter body. A connecting block is fixedly connected to one side of the multimeter body near the bottom surface. Movable grooves are formed on both sides of the connecting block, and pressing blocks are movably fitted into each of the two movable grooves. A locking groove is formed on the top surface of the connecting block, and a locking block is movably engaged in the locking groove. Compression springs are fixedly connected to the bottom surface of the locking block near both sides.

[0004] However, it still has some drawbacks in actual use. For example, the multimeter has a tension belt. When the tension of the tension belt needs to be adjusted, one end of the tension belt, which is movably connected in the adjusting block, is pulled out to shorten the length of the tension belt, making it more comfortable for the operator to use the multimeter. However, the tension belt is fixed to the adjusting rod by the locking groove, and can only be adjusted to the preset position. Moreover, the adjustment process is relatively cumbersome and cannot meet the needs of users with different hand sizes, which reduces the practicality of the multimeter to a certain extent. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a digital multimeter for fuel cell inspection, so as to solve the problem that the tension belt of the prior art can only be adjusted according to a preset position and the adjustment process is relatively cumbersome.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a digital multimeter for fuel cell inspection, comprising a multimeter body, and the digital multimeter for fuel cell inspection further comprising...

[0007] A take-up roller is located on the surface of the multimeter body. An elastic belt is provided on the outside of the take-up roller, and a connecting roller is fixedly connected to the side of the elastic belt opposite to the take-up roller.

[0008] Mounting base, the mounting base is fixedly installed on the surface of the multimeter body, and the two sides of the surface of the mounting base are provided with snap-fit ​​grooves;

[0009] The guide rail is arranged opposite to each other on both sides of the mounting base along its length. A spring is fixedly connected to the inner wall of the guide rail. A movable seat is fixedly connected to one end of the spring relative to the guide rail. The surface of the movable seat is slidably connected to the inner wall of the guide rail.

[0010] A connecting plate is fixedly installed on one side of the moving seat along its length. A mounting column is fixedly connected to the top of the connecting plate. The mounting column is a hollow structure. A torsion spring is fixedly connected to the inner cavity of the mounting column. A sleeve ring is fixedly connected to one end of the torsion spring opposite to the inner wall of the mounting column. The inner wall of the sleeve ring is rotatably connected to the outside of the mounting column. A connecting plate is provided on one side of the sleeve ring along its length. A snap-fit ​​block is fixedly installed on the surface of the connecting plate. The surface of the snap-fit ​​block snaps into the side end of the take-up roller.

[0011] The device also includes a movable column, a second connecting plate, and a snap-fit ​​column. The surface of the movable column is roughened. The movable column is slidably installed on the inner wall of the side of the moving base relative to the multimeter body. The second connecting plate is fixedly installed on the side of the movable column relative to the moving base. The snap-fit ​​column is located on one side of the connecting plate in the length direction. One end of the snap-fit ​​column surface relative to the second connecting plate is snapped into the inside of the snap-fit ​​groove.

[0012] The device includes a fixed base, a guide rod, a second spring, an L-shaped plate, a fixing groove, and a stop plate. The fixed base is fixedly installed on the surface of the multimeter body and is located directly above the connecting roller. The guide rod is fixedly installed inside the fixed base. The second spring is movably sleeved on the surface of the guide rod. One end of the second spring is fixedly connected to the inner wall of the fixed base, and the other end of the second spring is fixedly connected to the surface of the L-shaped plate. The top of the L-shaped plate is sleeved on the surface of the guide rod. The fixing groove is opened on one side of the width direction of the L-shaped plate. The stop plate is located on one side of the bottom of the L-shaped plate, and the surface of the stop plate is provided with protrusions for abutting against the side end of the connecting roller.

[0013] The mounting base has a snap-fit ​​plate on one side of its surface opposite the multimeter body. One side of the snap-fit ​​plate passes through the mounting base and snaps into the mounting groove.

[0014] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0015] In the above scheme, firstly, the elastic belt wound on the surface of the take-up roller is extended to a certain length. Then, the L-shaped plate set in the fixed seat is moved horizontally. At this time, the second spring is squeezed by the L-shaped plate and deformed. Then, the connecting roller is placed between the two abutment plates, and the elastic structure of the second spring drives the L-shaped plate to move and reset, so that the protrusion on the surface of the abutment plate abuts against the side end of the connecting roller. Finally, the locking plate is installed on the surface of the fixed seat, so that the locking plate can fix the L-shaped plate, thus completing the fixing of the connecting roller. Then, the take-up roller is placed between the two connecting discs, and the elastic structure of the first spring drives the moving seat to move horizontally, so that the locking block on the surface of the connecting disc can engage with the groove on the side end of the take-up roller. After the take-up roller is engaged, the movable column is pushed into the moving seat, so that the locking... The connecting post engages with the locking slot to fix the movable seat, thus centering the take-up roller. When the operator uses a multimeter, the tension belt is pulled out, causing the take-up roller and connecting disc to rotate. The torsion spring is then twisted, and the operator can place their hand between the multimeter body and the tension belt. The elastic structure of the torsion spring then drives the connecting disc to rotate and reset, causing the tension belt to be wound up. This allows the tension belt to fit snugly against the operator's hand, tightening the belt. This replaces the previous method of adjusting the tension belt only to a preset position. The adjustment process can be completed by pulling the tension belt, achieving adaptive adjustment of the tension belt, simplifying the adjustment process, and adapting to users with different hand shapes. Furthermore, the use of elastic elements and locking mechanisms facilitates subsequent replacement of the entire tension belt, improving the practicality of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a three-dimensional assembly drawing of the overall device of this utility model;

[0018] Figure 3 This is a schematic diagram of the relevant structures of the fixing base, L-shaped plate, and abutment plate of this utility model.

[0019] [Figure Labels]

[0020] 1. Multimeter body; 2. Take-up roller; 3. Tensioner belt; 4. Connecting roller; 5. Mounting base; 6. Snap-fit ​​groove; 7. Guide rail; 8. Spring 1; 9. Moving base; 10. Connecting plate 1; 11. Mounting column; 12. Torsion spring; 13. Sleeve ring; 14. Connecting disc; 15. Snap-fit ​​block; 16. Movable column; 17. Connecting plate 2; 18. Snap-fit ​​column; 19. Fixed base; 20. Guide rod; 21. Spring 2; 22. L-shaped plate; 23. Fixed groove; 24. Abutment plate; 25. Snap-fit ​​plate. Detailed Implementation

[0021] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0022] As attached Figure 1 To be continued Figure 3 An embodiment of this utility model provides a digital multimeter for fuel cell inspection, including a multimeter body 1, and further including...

[0023] Take-up roller 2 is located on the surface of multimeter body 1. An elastic belt 3 is provided on the outside of take-up roller 2. A connecting roller 4 is fixedly connected to the side of elastic belt 3 opposite to take-up roller 2.

[0024] Mounting base 5 is fixedly installed on the surface of the multimeter body 1. The two sides of the surface of the mounting base 5 are provided with snap-fit ​​grooves 6.

[0025] Guide rail 7 is arranged on both sides of the mounting base 5 along its length. Spring 8 is fixedly connected to the inner wall of guide rail 7. Movable base 9 is fixedly connected to one end of spring 8 relative to guide rail 7. The surface of movable base 9 is slidably connected to the inner wall of guide rail 7.

[0026] A connecting plate 10 is fixedly installed on one side of the moving seat 9 along its length. A mounting column 11 is fixedly connected to the top of the connecting plate 10. The mounting column 11 is a hollow structure. A torsion spring 12 is fixedly connected to the inner cavity of the mounting column 11. A sleeve ring 13 is fixedly connected to one end of the torsion spring 12 relative to the inner wall of the mounting column 11. The inner wall of the sleeve ring 13 is rotatably connected to the outside of the mounting column 11. A connecting plate 14 is provided on one side of the sleeve ring 13 along its length. A snap-fit ​​block 15 is fixedly installed on the surface of the connecting plate 14. The surface of the snap-fit ​​block 15 snaps against the side end of the take-up roller 2.

[0027] The system also includes a movable column 16, a connecting plate 17, and a locking column 18. The surface of the movable column 16 is roughened. The movable column 16 is slidably installed on the inner wall of the side of the moving base 9 opposite to the multimeter body 1. The connecting plate 17 is fixedly installed on the side of the movable column 16 opposite to the moving base 9. The locking column 18 is located on one side of the connecting plate 17 along its length. One end of the locking column 18 opposite to the connecting plate 17 is locked into the inside of the locking groove 6. By locking the locking column 18 into the locking groove 6, the elasticity of the spring 8 can be reduced after long-term use, which could cause the locking block 15 to separate from the side end of the winding roller 2 during the winding of the tension belt 3.

[0028] The device includes a fixed base 19, a guide rod 20, a second spring 21, an L-shaped plate 22, a fixing groove 23, and an abutment plate 24. The fixed base 19 is fixedly installed on the surface of the multimeter body 1 and is located directly above the connecting roller 4. The guide rod 20 is fixedly installed inside the fixed base 19. The second spring 21 is movably sleeved on the surface of the guide rod 20. One end of the second spring 21 is fixedly connected to the inner wall of the fixed base 19, and the other end of the second spring 21 is fixedly connected to the surface of the L-shaped plate 22. The top of the L-shaped plate 22 is sleeved on the surface of the guide rod 20. The fixing groove 23 is formed in the L-shaped plate 22. On one side of the width direction, the abutment plate 24 is set on the bottom side of the L-shaped plate 22. The surface of the abutment plate 24 is provided with a protrusion for abutting against the side end of the connecting roller 4. Through the abutment plate 24, the abutment plate 24 and the protrusion on its surface abut against the side end of the connecting roller 4, the connecting roller 4 can rotate around the protrusion during the pulling process of the elastic belt 3, so as to avoid the fixed angle of the connecting roller 4 affecting the feeling when the elastic belt 3 comes into contact with the person's hand. At the same time, the position of the abutment plate 24 can be fixed by the snap-fit ​​plate 25 and the L-shaped plate 22, so as to prevent the protrusion from accidentally separating from the side end of the connecting roller 4 during the use of the multimeter.

[0029] Among them, a snap-fit ​​plate 25 is provided on the side of the surface of the fixing base 19 opposite to the multimeter body 1, and one side of the snap-fit ​​plate 25 passes through the fixing base 19 and snaps into the fixing groove 23.

[0030] The working process of this utility model is as follows: First, the elastic belt 3 wound on the surface of the take-up roller 2 is extended to a certain extent so that the elastic belt 3 maintains a certain length. Then, the L-shaped plate 22 set in the fixed seat 19 is moved horizontally. At this time, the spring 21 is squeezed by the L-shaped plate 22 and deformed. Then, the connecting roller 4 is placed between the two abutment plates 24, and the elastic structure of the spring 21 drives the L-shaped plate 22 to move and reset, so that the protrusion on the surface of the abutment plate 24 abuts against the side end of the connecting roller 4. Finally, the snap-fit ​​plate 25 is installed on the surface of the fixed seat 19 so that the snap-fit ​​plate 25 can fix the L-shaped plate 22, that is, the fixing of the connecting roller 4 is completed. Then, the take-up roller 2 is placed between the two connecting discs 14, and the elastic structure of the spring 8 is used to fix the L-shaped plate 22. The mechanism drives the moving seat 9 to move horizontally, so that the locking block 15 on the surface of the connecting plate 14 can engage with the groove on the side of the take-up roller 2. After the take-up roller 2 is engaged, the movable column 16 is pushed into the moving seat 9, so that the locking column 18 engages with the locking groove 6 to fix the moving seat 9, thus completing the centering of the take-up roller 2. When the operator uses the multimeter, the tension belt 3 is pulled out. At this time, the take-up roller 2 and the connecting plate 14 rotate, and the torsion spring 12 is twisted. Then, the operator can place their hand between the multimeter body 1 and the tension belt 3. Then, the elastic structure of the torsion spring 12 drives the connecting plate 14 to rotate and reset, so that the tension belt 3 is wound up, so that the tension belt 3 can fit with the operator's hand, thus completing the tightening of the tension belt 3.

[0031] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0032] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0033] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A digital multimeter for inspecting fuel cells, comprising a multimeter body (1), characterized in that, The digital multimeter for fuel cell inspection also includes A take-up roller (2) is located on the surface of the multimeter body (1). An elastic belt (3) is provided on the outside of the take-up roller (2). A connecting roller (4) is fixedly connected to one side of the elastic belt (3) relative to the take-up roller (2). Mounting base (5), which is fixedly mounted on the surface of the multimeter body (1), and the two sides of the surface of the mounting base (5) are provided with snap-fit ​​grooves (6); Guide rail (7), the guide rail (7) is arranged opposite to each other on both sides of the mounting base (5) along the length direction, the inner wall of the guide rail (7) is fixedly connected to a spring (8), the spring (8) is fixedly connected to a movable seat (9) at one end of the guide rail (7), and the surface of the movable seat (9) is slidably connected to the inner wall of the guide rail (7). A connecting plate (10) is fixedly installed on one side of the moving seat (9) along its length. A mounting column (11) is fixedly connected to the top of the connecting plate (10). The mounting column (11) is a hollow structure. A torsion spring (12) is fixedly connected to the inner cavity of the mounting column (11). A sleeve ring (13) is fixedly connected to one end of the torsion spring (12) relative to the inner wall of the mounting column (11). The inner wall of the sleeve ring (13) is rotatably connected to the outside of the mounting column (11). A connecting plate (14) is provided on one side of the sleeve ring (13) along its length. A snap-fit ​​block (15) is fixedly installed on the surface of the connecting plate (14). The surface of the snap-fit ​​block (15) snaps against the side end of the take-up roller (2).

2. The digital multimeter for fuel cell inspection according to claim 1, characterized in that, It also includes a movable column (16), a connecting plate two (17), and a snap-fit ​​column (18). The surface of the movable column (16) is set with a rough surface structure. The movable column (16) is slidably installed on the inner wall of the side of the moving base (9) opposite to the multimeter body (1). The connecting plate two (17) is fixedly installed on the side of the movable column (16) opposite to the moving base (9). The snap-fit ​​column (18) is set on one side of the connecting plate two (17) along its length direction. One end of the surface of the snap-fit ​​column (18) opposite to the connecting plate two (17) is snapped into the inside of the snap-fit ​​groove (6).

3. The digital multimeter for fuel cell inspection according to claim 1, characterized in that, It also includes a fixed seat (19), a guide rod (20), a second spring (21), an L-shaped plate (22), a fixed groove (23), and an abutment plate (24). The fixed seat (19) is fixedly installed on the surface of the multimeter body (1) and is located directly above the connecting roller (4). The guide rod (20) is fixedly installed inside the fixed seat (19). The second spring (21) is movably sleeved on the surface of the guide rod (20). One end of the second spring (21) is fixedly connected to the inner wall of the fixed seat (19), and the other end of the second spring (21) is fixedly connected to the surface of the L-shaped plate (22). The top of the L-shaped plate (22) is sleeved on the surface of the guide rod (20). The fixed groove (23) is opened on one side of the width direction of the L-shaped plate (22). The abutment plate (24) is set on one side of the bottom of the L-shaped plate (22). The surface of the abutment plate (24) is provided with a protruding post for abutting against the side end of the connecting roller (4).

4. The digital multimeter for fuel cell inspection according to claim 3, characterized in that, A snap-fit ​​plate (25) is provided on the side of the fixed base (19) opposite to the multimeter body (1), and one side of the snap-fit ​​plate (25) passes through the fixed base (19) and snaps into the fixed groove (23).

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