Universal meter convenient for winding test lead

Abstract

The utility model provides a universal meter convenient to wind a test lead, the universal meter is provided with a winding structure, the winding structure comprises a limit seat, a winding seat, a winding shaft and a clockwork spring, the winding shaft is rotatably arranged on the limit seat, the clockwork spring is arranged in the limit seat, the clockwork spring is wound outside the winding shaft, the inner end of the clockwork spring is connected with the winding shaft, and the winding shaft is connected with the winding seat. The outer end of the winding shaft is fixed on the limiting seat, so that the winding shaft rotates to drive the clockwork spring to be tightened or unfolded, a coaxial winding seat is fixedly arranged on the winding shaft, a test lead is wound outside the winding seat, the connecting end of the test lead is detachably connected to the winding seat, and the winding direction of the test lead is opposite to the winding direction of the clockwork spring. When the test end is drawn out, the winding shaft rotates in the forward direction, the clockwork spring is tightened to generate elastic deformation, the elastic deformation promotes the winding shaft to rotate in the reverse direction, and then the test lead is wound and recycled on the winding seat.

Description

Technical Field

[0001] This utility model relates to the field of multimeter technology, and more specifically, to a multimeter that facilitates the winding of test leads. Background Technology

[0002] The red and black probes are respectively connected to the two metal tips of the same lead. This is to check the lead's continuity, insulation, or verify its reliability when measuring circuits. In existing technology, the two test leads are of moderate length, but if not properly stored after use, they can naturally curl and tangle. Users need to untangle them before use; otherwise, measurement errors may occur. Furthermore, untangling the wires inevitably pulls on the tangled wires, causing physical damage. Therefore, a multimeter that facilitates the winding of test leads is proposed. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] This invention provides a multimeter that facilitates the winding of test leads, featuring a winding structure to achieve automatic winding of test leads.

[0005] (II) Technical Solution

[0006] A multimeter for easy winding of test leads includes a multimeter body with a winding structure. The winding structure includes a limiting seat, a winding seat, a winding shaft, and a spring. The winding shaft is rotatably mounted within the limiting seat, and the spring is also mounted within the limiting seat. The spring has an inner end and an outer end, and is wound around the winding shaft. The inner end is connected to the winding shaft, and the outer end is connected to the limiting seat. The winding shaft is fixed on the winding seat, and a test lead is wound around the outside of the winding seat. The test lead includes a connecting end and a test end, with the connecting end closer to the limiting seat than the test end. A segment of the test lead near the connecting end is detachably connected to the winding seat. The winding directions of the spring and the test lead are opposite. Initially, the spring is unwound. When the test end is pulled out, the spring gradually tightens, and elastic deformation occurs inside the spring. When the test end is released, the spring gradually unwound, causing the winding shaft to rotate, thus automatically winding the test lead around the winding seat.

[0007] Furthermore, the winding shaft is provided with a strip-shaped hole, and the inner end of the spring is embedded in the strip-shaped hole.

[0008] Furthermore, the winding structure also includes a housing, on which a connecting seat is provided. The connecting seat has a threaded hole, and a screw is installed in the threaded hole. The screw is used to connect to the multimeter body.

[0009] Furthermore, the outer casing is provided with a first cable outlet and a second cable outlet, with the test terminal passing through the first cable outlet and the connection terminal passing through the second cable outlet.

[0010] Furthermore, the outer casing is provided with a bearing, the bearing includes an inner ring with a spline groove, the winding shaft is provided with a connecting section with a spline, and the spline and spline groove are clearance-fitted.

[0011] Furthermore, it also includes a one-way seat and a locking assembly. The one-way seat has several locking grooves in its circumference. The locking grooves include a blocking side and a sliding side. The blocking side and sliding side of adjacent locking grooves are interconnected. The locking assembly includes a locking disc. The locking disc is fixedly connected to the winding shaft. The locking disc has several limiting grooves in its circumference. A locking spring is fixed in the limiting groove. A ball is provided at the end of the locking spring. The ball is movably disposed in the locking groove. When the ball slides to the sliding side, the ball is pressed into the limiting groove. The ball enters the adjacent locking groove through the sliding side. When the ball slides to the blocking side, the ball pops out from the limiting groove and is locked into the blocking side, restricting the ball from entering the adjacent limiting groove from the blocking side.

[0012] Furthermore, a transition seat is provided below the one-way seat. The transition seat has a vertically connected transition groove and a rotating groove. The transition groove is connected to the limiting groove. The diameter of the transition groove gradually decreases from top to bottom. The minimum diameter of the transition groove is equal to the diameter of the rotating groove, so that the locking disc enters the rotating groove.

[0013] Furthermore, the take-up holder includes a base plate and several arc plates, which are distributed at intervals around the base plate, forming several gaps between them. Test leads are inserted into the gaps, so that the test leads are wound between the arc plates.

[0014] (III) Beneficial Effects

[0015] This invention provides a multimeter that facilitates the winding of test leads. It features a winding structure with a limit seat and a winding seat on the winding shaft. A spring wound around the winding shaft is housed within the limit seat. The test lead is wound around the outside of the winding seat. When the test end of the test lead is pulled out, the winding shaft rotates forward, tightening the spring and causing elastic deformation. This elastic deformation causes the winding shaft to rotate in the opposite direction, thus automatically winding the test lead. This structure promptly winds up the test lead, improving storage efficiency and ease of extraction, thereby enhancing user efficiency. Attached Figure Description

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

[0017] Figure 2 This is a schematic diagram (II) of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the winding structure, one-way seat, and locking assembly in this utility model;

[0019] Figure 4 This is a front view of the winding shaft in this utility model;

[0020] Figure 5 This is a schematic diagram of the locking component in this utility model;

[0021] Figure 6 This is a schematic diagram of the winding seat in this utility model;

[0022] Figure 7 This is a top view of the one-way seat and the transition seat in this utility model;

[0023] Figure 8 for Figure 7 The sectional view at point aa.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Outer shell; 12. Second outlet; 13. Bearing; 14. First outlet; 2. Test probe; 3. Connecting seat; 31. Threaded hole; 4. Test lead; 5. Rewinding shaft; 51. Connecting section; 52. Strip hole; 6. Limiting seat; 7. Spring; 8. Rewinding seat; 81. Arc plate; 82. Gap; 83. Base plate; 9. Locking assembly; 91. Ball bearing; 92. Locking spring; 93. Locking disc; 931. Limiting groove; 10. One-way seat; 101. Locking groove; 1011. Blocking side; 1012. Sliding side; 11. Transition seat; 111. Transition groove; 112. Rotation groove. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] See Figures 1 to 8This utility model discloses a multimeter for easy winding of test leads. It includes a multimeter body with a winding structure comprising a housing 1, a limiting seat 6, a winding seat 8, a winding shaft 5, and a spring 7. The limiting seat 6 is fixed inside the housing 1. The winding shaft 5 is rotatably disposed within the limiting seat 6. The spring 7 is disposed within the limiting seat 6 and includes an inner end and an outer end. The spring 7 is wound around the winding shaft 5, with the inner end connected to the winding shaft 5 and the outer end connected to the limiting seat 6. The winding shaft 5 is fixed on the winding seat 8. A test lead 4 is wound around the outside of the winding seat 8. The test lead 4 includes a connecting end and a test end. The housing 1 has a first outlet 14 and a second outlet 12. The test end passes through the first outlet 14, and the connecting end passes through the second outlet 12. The connecting end is used to set the plug for connecting to the multimeter jack, and the test end is used to set the test probe 2. The connecting end is closer to the limit seat 6 than the test end. The section of the test lead 4 near the connecting end is detachably connected to the take-up seat 8. The winding direction of the spring 7 and the test lead 4 is opposite. In the initial state, the spring 7 is unwound from the inside to the outside. When the test end is pulled out, the spring 7 gradually winds up from the inside to the outside, and elastic deformation occurs inside the spring 7. When the test end is released, the spring 7 gradually unwound from the outside to the inside, and the spring 7 releases torque, driving the take-up shaft 5 to rotate, so that the test lead 4 automatically winds up along the take-up seat 8. By setting up a winding structure with a spring 7 on the winding shaft 5, when in use, the test lead 4 is pulled out, causing the winding shaft 5 to rotate in the forward direction. The spring 7 tightens, storing a certain amount of elastic potential energy. After use, the test lead 4 is released, the spring 7 unwinds, and the winding shaft 5 rotates in the reverse direction, causing the test lead 4 to automatically wind up and retract. This structure is simple and easy to implement. The winding structure can prevent the test leads 4 from tangling together, improving storage efficiency, and at the same time, it facilitates the extraction and use of the test leads 4, making it highly practical.

[0028] The winding shaft 5 has a strip-shaped hole 52, and the inner end of the spring 7 is fitted into the strip-shaped hole 52. The length of the strip-shaped hole 52 is set to be greater than the width of the spring 7. When the winding shaft 5 moves axially, the spring 7 can move along the strip-shaped hole 52, thereby reducing the influence of the winding shaft 5 on the spring 7. The winding base 8 includes a base plate 83 and several arc plates 81. The arc plates 81 are distributed around the base plate 83 at intervals, forming several gaps 82 between the arc plates 81. The test lead 4 is inserted into the gaps 82 in a crisscross pattern, so that the test lead 4 is wound between the arc plates 81. The winding base 8 can not only fix the section of the test lead 4 near the connection end on the arc plate 81, but also wind the test lead 4 onto the circumferentially distributed arc plates 81.

[0029] A connector 3 is provided on the outer casing 1. The connector 3 has a threaded hole 31 and a screw is installed in the threaded hole 31 so that the connector 3 is fixed on both sides of the multimeter body.

[0030] Bearings 13 are respectively provided on the limiting seat 6 and the outer shell 1. The bearing 13 includes an inner ring and an outer ring. A rolling element and a cage are provided between the inner ring and the outer ring, so that the inner ring can rotate to connect with the outer ring. The inner ring is provided with a spline groove. The winding shaft 5 is provided with a connecting section 51. The connecting section 51 is provided with a spline. The spline and the spline groove are fitted with a clearance 82. This structure can not only ensure the stability of the winding shaft 5 when rotating, but also allow the winding shaft 5 to move along the axial direction.

[0031] It also includes a one-way seat 10 and a locking assembly 9. The locking assembly 9 includes a locking disc 93, which is fixedly connected to the winding shaft 5. In this embodiment, the locking disc 93 has eight limiting grooves 931 in its circumference. A locking spring 92 is fixed in the limiting groove 931. A ball bearing 91 is provided at the end of the locking spring 92. The ball bearing 91 is movably disposed in the locking groove 101. The one-way seat 10 has eight interconnected locking grooves 101 in its circumference. Each locking groove 101 includes a blocking side 1011 and a sliding side 1012. The blocking side 1011 uses a ball bearing. The ball bearing 91 has a matching spherical arc surface, and the sliding side 1012 is an inclined plane. Both ends of the sliding side 1012 are connected to the blocking sides 1011 of the adjacent locking grooves 101. When the ball bearing 91 slides to the sliding side 1012, it is pressed into the limiting groove 931. The ball bearing 91 then enters the adjacent locking groove 101 through the sliding side 1012. When the ball bearing 91 slides to the blocking side 1011, it pops out of the limiting groove 931 and locks into the blocking side 1011, preventing it from entering the adjacent limiting groove 931. This structure allows the winding shaft 5 to rotate in only one direction, allowing the user to pull out any length of test lead 4 as needed, without the spring 7 rotating back.

[0032] A transition seat 11 is provided below the one-way seat 10. The locking disc 93 enters the rotating groove 112, releasing the restriction of the one-way seat 10 on the locking disc 93. The transition seat 11 has a vertically penetrating transition groove 111 and a rotating groove 112. The transition groove 111 connects to the limiting groove 931. The diameter of the transition groove 111 gradually decreases from top to bottom, and the minimum diameter of the transition groove 111 is equal to the diameter of the rotating groove 112. The diameter of the rotating groove 112 is slightly larger than the diameter of the locking disc 93. After the locking disc 93 enters the rotating groove 112, the ball bearing 91 is pressed into the limiting groove 931, allowing the locking disc 93 to rotate along the rotating groove 112. In use, the winding shaft 5 needs to be moved axially first, so that the locking disc 93 is pressed into the rotating groove 112. After the restriction of the one-way seat 10 is released, the winding shaft 5 automatically rotates in the opposite direction under the action of the spring 7. During rotation, the test lead 4 is retracted, and the spring 7 gradually unfolds. This structure facilitates the storage of the test lead 4 by pressing the locking disc 93 from the one-way seat 10 into the rotating groove 112.

[0033] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A multimeter that facilitates winding of a test lead, comprising a multimeter body, characterized by, The multimeter body is provided with a winding structure, the winding structure comprises a limiting seat (6), a winding seat (8), a winding shaft (5) and a clockwork spring (7), the winding shaft (5) is rotatably arranged in the limiting seat (6), the clockwork spring (7) is arranged in the limiting seat (6), the clockwork spring (7) comprises an inner end and an outer end, the clockwork spring (7) is wound on the winding shaft (5), the inner end is connected with the winding shaft (5), the outer end is connected with the limiting seat (6), the winding seat (8) is fixed with the winding shaft (5), a test lead (4) is wound on the outside of the winding seat (8), the test lead (4) comprises a connecting end and a test end, the connecting end is closer to the limiting seat (6) than the test end, a section of the test lead (4) close to the connecting end is detachably connected to the winding seat (8), the winding directions of the clockwork spring (7) and the test lead (4) are opposite, in the initial state, the clockwork spring (7) is unfolded, when the test end is pulled out, the clockwork spring (7) is gradually wound up, the clockwork spring (7) is elastically deformed, when the test end is released, the clockwork spring (7) is gradually unfolded, driving the winding shaft (5) to rotate, so that the test lead (4) is automatically wound along the winding seat (8).

2. The multimeter for facilitating the winding of test leads according to claim 1, wherein, The winding shaft (5) is provided with a strip-shaped hole (52), the inner end of the clockwork spring (7) is clamped in the strip-shaped hole (52).

3. The multimeter for facilitating the winding of test leads of claim 1, wherein, The winding structure further comprises a shell (1), the shell (1) is provided with a connecting seat (3), the connecting seat (3) is provided with a threaded hole (31), a screw is arranged in the threaded hole (31), and the screw is used for connecting the multimeter body.

4. The multimeter of claim 3, wherein, The shell (1) is provided with a first wire outlet (14) and a second wire outlet (12), the test end is inserted into the first wire outlet (14), and the connecting end is inserted into the second wire outlet (12).

5. The multimeter of claim 3, wherein, The shell (1) is provided with a bearing (13), the bearing (13) comprises an inner ring, the inner ring is provided with a spline groove, the winding shaft (5) is provided with a connecting section (51), the connecting section (51) is provided with a spline, and the spline and the spline groove are clearance fitted.

6. The multimeter of claim 3, wherein, Also include one-way seat (10) and locking assembly (9), the circumference of the one-way seat (10) is provided with several locking grooves (101), the locking groove (101) includes the blocking side (1011) and the sliding side (1012), the blocking side (1011) and the sliding side (1012) of adjacent locking groove (101) communicate with each other, the locking assembly (9) includes locking disc (93), the locking disc (93) is fixedly connected with the winding shaft (5), the circumference of the locking disc (93) is provided with several limiting grooves (931), the limiting groove (931) is fixedly connected with locking spring (92), the end of the locking spring (92) is provided with a ball (91), the ball (91) is movably arranged in the locking groove (101), when the ball (91) slides to the sliding side (1012), the ball (91) is pressed into the limiting groove (931), the ball (91) enters adjacent locking groove (101) through the sliding side (1012), when the ball (91) slides to the blocking side (1011), the ball (91) is ejected from the limiting groove (931), and is clamped into the blocking side (1011), so as to limit the ball (91) from entering adjacent limiting groove (931) from the blocking side (1011).

7. The multimeter of claim 6, wherein, The lower side of the one-way seat (10) is provided with a transition seat (11), the transition seat (11) is provided with an upper and lower through transition groove (111) and rotating groove (112), the transition groove (111) communicates with the limiting groove (931), the diameter of the transition groove (111) gradually decreases from top to bottom, the minimum diameter of the transition groove (111) is equal to the diameter of the rotating groove (112), so that the locking disc (93) enters the rotating groove (112).

8. The multimeter of claim 1, wherein, The winding seat (8) includes a bottom plate (83) and a plurality of circular arc plates (81), the circular arc plates (81) are distributed at intervals around the bottom plate (83), a plurality of gaps (82) are formed between the circular arc plates (81), the test lead (4) is inserted into the gap (82), so that the test lead (4) is arranged around the circular arc plates (81).

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