Battery compartment cover resistance tester

Abstract

This utility model provides a battery compartment cover resistance tester, relating to the field of resistance measurement technology. The tester includes a housing, an inner core, an insulating sleeve, an elastic element, and a resistance measuring element. The inner core, insulating sleeve, and elastic element are placed in the cavity of the housing. The insulating sleeve isolates the housing from the inner core. One end of the housing is open and has an external thread for connecting the battery compartment cover. When the cover is screwed in, the elastic element is compressed, one end of the elastic element abuts against the insulating sleeve, and the other end pushes the inner core to contact and conduct with the cover. At the same time, the housing is electrically connected to the cover through the thread, which equivalently simulates the stress state of the cover when it is actually assembled in the battery compartment. The two poles of the resistance measuring element are respectively connected to the housing and the inner core, forming a measurement circuit including the housing, the cover, and the inner core, simulating the overcurrent state of the cover in the power supply circuit. The measuring element measures the sum of the resistances of the three components. By comparing with a set standard range, the cover is in an actual assembly state. Based on the measured value, it is determined whether the resistance of the cover circuit meets the standard.

Description

Technical Field

[0001] This utility model relates to the field of resistance measurement technology, and in particular to a battery compartment cover resistance tester. Background Technology

[0002] In devices such as sights, handheld telescopes, and laser rangefinders, standard cylindrical batteries (such as 18650 and CR2) are a common power supply solution. These batteries are installed in the battery compartment of the device housing, and the battery compartment cover is screwed onto the battery compartment via threads. During the tightening process, the cover pushes the spring inside the compartment to press the battery electrodes, forming a complete power supply circuit. The battery compartment cover is a critical component of this power supply circuit, and its conductivity directly affects the reliability of the device. However, in actual production, it has been found that the circuit resistance value of the battery compartment cover in the assembled state (as part of the device's power supply circuit) differs significantly from the resistance value of a single battery compartment cover measured individually. In addition, due to factors such as manufacturing processes, the circuit resistance values ​​of different battery compartment covers in the assembled state exhibit significant dispersion (large individual differences). Currently, the detection methods are limited to measuring the resistance of a single battery compartment cover and cannot effectively assess its actual circuit resistance performance in the assembled state. If the device is equipped with a battery compartment cover with a circuit resistance value higher than the standard, it will increase the voltage loss in the circuit, thereby shortening the device's battery life. If the device is equipped with a battery compartment cover with a circuit resistance value much higher than the standard, it may lead to insufficient circuit current, causing the device to fail to start normally. Utility Model Content

[0003] The purpose of this invention is to provide a battery compartment cover resistance tester, which can determine whether the circuit resistance of the battery compartment cover meets the standard circuit resistance value range when the cover is in the assembly state, so as to improve the consistency of mass production of equipment.

[0004] To achieve the above objectives, the technical solution of this utility model embodiment is as follows:

[0005] A battery compartment cover resistance tester, comprising:

[0006] The housing has an axially extending cavity inside, one end of which is an open end and is provided with an external thread for the battery compartment cover to be threaded onto.

[0007] An inner core is disposed within the cavity;

[0008] An insulating sleeve is disposed within the cavity and located between the shell and the inner core.

[0009] An elastic element is disposed in the cavity and located between the inner core and the insulating sleeve. When the battery compartment cover is threaded onto the external thread, one end of the elastic element abuts against the insulating sleeve, and the other opposite end abuts against one end of the inner core, and the other opposite end of the inner core abuts against the battery compartment cover.

[0010] The resistance measuring device has its positive and negative terminals electrically connected to the housing and the inner core, respectively. When the battery compartment cover is threaded onto the external thread, the resistance measuring device is connected to the resistance measuring circuit formed by the housing, the battery compartment cover, and the inner core.

[0011] Furthermore,

[0012] The opening end is provided with an annular groove, and an annular rubber ring is installed in the annular groove. The annular rubber ring is used to abut against the battery compartment cover when the battery compartment cover is threaded onto the external threaded part.

[0013] Furthermore,

[0014] The inner core is provided with an insulating guide post extending radially therein, and the shell is provided with a guide groove that is adapted to the insulating guide post and extends axially along the length and width of the shell.

[0015] Furthermore,

[0016] The inner core is cylindrical, and the elastic element is a cylindrical helical compression spring.

[0017] Furthermore,

[0018] The resistance measuring device is a Kelvin resistance tester.

[0019] Furthermore,

[0020] The end of the housing away from the open end is a closed end. The cable of the positive terminal of the Kelvin resistance tester passes through the closed end and the through hole on the insulating sleeve in sequence and is electrically connected to the end of the inner core near the elastic element. The cable of the negative terminal of the Kelvin resistance tester is connected to the closed end.

[0021] Furthermore,

[0022] The inner core has a first blind mounting hole for installing a cable and a first screw through hole for installing a flat-head set screw and communicating with the first blind mounting hole at one end near the elastic member. The axis of the first blind mounting hole is arranged perpendicular to the axis of the first screw through hole.

[0023] Furthermore,

[0024] The closed end of the housing is provided with a second blind mounting hole for installing a cable and a second screw through hole for installing a flat-head set screw and communicating with the second blind mounting hole. The axis of the second blind mounting hole is arranged perpendicular to the axis of the second screw through hole.

[0025] Furthermore,

[0026] The outer side of the shell wall of the housing is provided with a knurled anti-slip surface.

[0027] Furthermore,

[0028] The shell is cylindrical.

[0029] Compared with the prior art, the embodiments of this utility model have at least the following technical effects:

[0030] This utility model's battery compartment cover resistance tester includes a housing, an inner core, an insulating sleeve, an elastic element, and a resistance measuring element. The inner core, insulating sleeve, and elastic element are all housed within the cavity of the housing. The insulating sleeve is located between the housing and the inner core to prevent electrical connection after contact between them. One end of the housing is an open end with an external thread for the battery compartment cover to be threaded onto it. When the battery compartment cover is threaded onto the external thread, one end of the elastic element abuts against the insulating sleeve, and the other opposite end abuts against one end of the inner core. The other opposite end of the inner core is also electrically connected to the battery compartment cover after abutting against it. Electrical connection between the battery compartment cover and the housing is achieved by the battery compartment cover being threaded onto the external thread. The elastic element, located within the housing, allows the cover to be threaded onto the external thread due to its elasticity. After the inner core contacts the battery compartment cover, it becomes electrically connected. This effectively simulates the stress state of the battery compartment cover when it is actually assembled in the battery compartment. The positive terminal of the resistance measuring device is connected to the shell, and the negative terminal is connected to the inner core. The resistance measuring device, the shell, the battery compartment cover, and the inner core can form a resistance measuring circuit, which effectively simulates the overcurrent state when the compartment cover acts as a power supply circuit for the equipment. The resistance measuring device can simultaneously measure the sum of the resistance values ​​of the shell, the compartment cover, and the inner core. When the standard sum of resistance values ​​is set, the resistance measuring device can be used to judge and evaluate whether the circuit resistance of the battery compartment cover meets the standard circuit resistance value range when the compartment cover is in the assembled state. This qualitative analysis determines whether the compartment cover meets the requirements and can be assembled into the equipment, improving the consistency of mass production of the equipment. Attached Figure Description

[0031] Figure 1 This is a cross-sectional view of an embodiment of the battery compartment cover resistance tester;

[0032] Figure 2 This is an exploded view of a portion of the structure in one embodiment of the battery compartment cover resistance tester.

[0033] Explanation of icon numbers:

[0034] 10. Housing; 11. Cavity; 12. Open end; 120. Annular groove; 121. Annular rubber ring; 13. Closed end; 14. External threaded part; 15. Guide groove; 16. Second mounting blind hole; 17. Second screw through hole;

[0035] 20. Inner core; 21. Insulating guide post; 22. First blind mounting hole; 23. First screw through hole;

[0036] 30. Insulating sleeve;

[0037] 40. Elastic components;

[0038] 50. Battery compartment cover;

[0039] 60. Resistance measuring device. Detailed Implementation

[0040] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in this specification of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. In the following description, the expression "some embodiments" refers to a subset of all possible embodiments; however, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0041] It should also be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0042] Please see Figure 1-2As shown, in one embodiment of this utility model, a battery compartment cover resistance tester includes a housing 10, an inner core 20, an insulating sleeve 30, an elastic element 40, and a resistance measuring element 60. The housing 10 has an axially extending cavity 11 inside, one end of which is an open end 12 and is provided with an external threaded portion 14 for the battery compartment cover 50 to be threaded onto. The inner core 20 is disposed in the cavity 11, the insulating sleeve 30 is disposed in the cavity 11 and located between the housing 10 and the inner core 20, and the elastic element 40 is disposed in the cavity 11 and located between the inner core 20 and the housing 10. Between the battery compartment cover 50 and the insulating sleeve 30, one end of the elastic element 40 abuts against the insulating sleeve 30 when the battery compartment cover 50 is threaded onto the external thread portion 14, and the other opposite end abuts against one end of the inner core 20, and the other opposite end of the inner core 20 abuts against the battery compartment cover 50. The positive and negative terminals of the resistance measuring element 60 are electrically connected to the housing 10 and the inner core 20, respectively. When the battery compartment cover 50 is threaded onto the external thread portion 14, the resistance measuring element 60 is connected to the resistance measuring circuit formed by the housing 10, the battery compartment cover 50 and the inner core 20.

[0043] In the above scheme, the battery compartment cover 50 is threaded onto the external thread 14 of the housing 10, achieving electrical connection between the cover and the housing 10. An elastic element 40 is provided inside the housing 10. When the cover is fitted onto the external thread 14, the elastic force of the elastic element 40 pushes the inner core 20 into contact with the cover, thus achieving electrical connection. This effectively simulates the force state of the battery compartment cover 50 when actually assembled in the battery compartment (at this time, the battery compartment cover 50 is subjected to the pushing force of the elastic element 40 and the tightening force with the external thread 14). Furthermore, the housing 10, battery compartment cover 50, and inner core 20 form a combined unit. The resistance measuring element 60 has its positive terminal connected to the housing 10 and its negative terminal connected to the inner core 20. Of course, the two terminals of the resistance measuring element 60 can... Connect one electrode to the housing 10 and the other electrode to the inner core 20. The resistance measuring device 60, housing 10, battery compartment cover 50, and inner core 20 can form a resistance measuring circuit, which can simulate the overcurrent state when the cover acts as a power supply circuit for the equipment. The resistance measuring device 60 can simultaneously measure the sum of the resistance values ​​of housing 10, battery compartment cover 50, and inner core 20. When the standard sum of resistance values ​​is set, the resistance measuring device 60 can be used to judge and evaluate whether the circuit resistance of battery compartment cover 50 meets the standard circuit resistance value range when the battery compartment cover 50 is in the assembled state. It can qualitatively analyze whether the resistance value of the cover meets the requirements and whether it can be assembled into the equipment, thereby improving the consistency of equipment mass production.

[0044] For further optimization of the solution, please refer to [link / reference]. Figure 1-2As shown, in one embodiment of this utility model, the opening end 12 is further provided with an annular groove 120, and an annular rubber ring 121 is installed in the annular groove 120. The annular rubber ring 121 is used to abut against the battery compartment cover 50 when the battery compartment cover 50 is threaded onto the external thread portion 14. This can equivalently simulate the force state of the battery compartment cover 50 when it is installed behind the battery compartment (at this time, the battery compartment cover 50 is subjected to the pushing force of the elastic member 40, the tightening force of the external thread portion 14, and the deformation recovery force generated after the elastic deformation of the annular rubber ring 121). The annular rubber ring 121 is provided in devices such as aiming scopes, handheld telescopes, and laser rangefinders to ensure the sealing of the battery compartment. In this embodiment, an additional annular rubber ring 121 is provided on the opening end 12, which can equivalently simulate the force state of the battery compartment cover 50 when the device is equipped with an additional annular rubber ring 121 on the original basis.

[0045] For further optimization of the solution, please refer to [link / reference]. Figure 1-2 As shown, in one embodiment of this utility model, the inner core 20 is further provided with an insulating guide post 21 extending radially therein, and the housing 10 is provided with a guide groove 15 adapted to the insulating guide post 21 and extending axially along the length and width of the housing 10. The guide groove 15 guides the insulating guide post 21 to move within it, thereby guiding the inner core 20 to move axially along the housing 10 within the cavity 11. The insulating guide post 21 can prevent electrical connection between the inner core 20 and the housing 10, effectively simulating the force state of the battery compartment cover 50 when it is installed in the battery compartment when the inner core 20 only moves (if the inner core 20 is not restricted, during the process of screwing the battery compartment cover 50 onto the external thread 14, the battery compartment cover 50 pushes the inner core 20, and the inner core 20 can rotate and move. With the addition of the insulating guide post 21, the inner core 20 is pushed by the battery compartment cover 50 and only moves back into the housing 10).

[0046] For further optimization of the solution, please refer to [link / reference]. Figure 1-2 As shown, in one embodiment of this utility model, the inner core 20 is cylindrical, and the elastic element 40 is a cylindrical helical compression spring. An equivalent simulation is performed to illustrate the force state of the battery compartment cover 50 after installation when the inner core 20 is cylindrical and the elastic element 40 is a cylindrical compression spring.

[0047] Please see Figure 1-2 As shown, in one embodiment of this utility model, the resistance measuring device 60 is a Kelvin resistance tester. The Kelvin resistance tester has high detection accuracy, with a detection precision of 0.001 ohms. Of course, the appropriate resistance measuring device can be selected according to the actual measurement scenario.

[0048] Please see Figure 1-2As shown, in one embodiment of this utility model, the end of the housing 10 away from the open end 12 is a closed end 13. The cable of the positive terminal of the Kelvin resistance tester passes sequentially through the closed end 13 and the through hole on the insulating sleeve 30, and is electrically connected to the end of the inner core 20 near the elastic member 40. The cable of the negative terminal of the Kelvin resistance tester is connected to the closed end 13. The end of the inner core 20 near the elastic member 40 is provided with a first mounting blind hole 22 for installing the cable and a first screw through hole 23 for installing a flat-head set screw and communicating with the first mounting blind hole 22. The axis of the first mounting blind hole 22 is arranged perpendicular to the axis of the first screw through hole 23. After the cable of the positive terminal of the Kelvin resistance tester is inserted into the first mounting blind hole 22, the flat-head set screw can press the cable from the first screw through hole 23, and the cable of the positive terminal can be stably connected to the inner core 20. The closed end 13 of the housing 10 is provided with a second blind mounting hole 16 for installing a cable and a second screw through hole 17 for installing a flat-head set screw and communicating with the second blind mounting hole 16. The axis of the second blind mounting hole 16 is arranged perpendicular to the axis of the second screw through hole 17. After the cable of the negative terminal of the Kelvin resistance tester is inserted into the second blind mounting hole 16, the flat-head set screw can press the cable from the second screw through hole 17, and the cable of the negative terminal can be stably connected to the closed end 13 of the housing 10. When the Kelvin resistance tester adopts the four-wire measurement method, the first blind mounting hole 22, the first screw through hole 23, the second blind mounting hole 16, and the second screw through hole 17 are set with corresponding numbers.

[0049] Please see Figure 1-2 As shown, in one embodiment of this utility model, the outer side of the shell wall of the housing 10 is provided with a knurled anti-slip surface that facilitates a firm grip by the hand. The housing 10 is cylindrical, which facilitates a grip by the hand, and houses the battery compartment cover 50.

[0050] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model shall be determined by the protection scope of the claims.

Claims

1. A battery compartment cover resistance tester, characterized in that, include: The housing (10) has an axially extending cavity (11) inside. One end of the housing (10) is an open end (12) and is provided with an external threaded part (14) for the battery compartment cover (50) to be threaded. The inner core (20) is disposed within the cavity (11); An insulating sleeve (30) is disposed inside the cavity (11) and located between the shell (10) and the inner core (20); An elastic element (40) is disposed inside the cavity (11) and located between the inner core (20) and the insulating sleeve (30). When the battery compartment cover (50) is threaded onto the external thread (14), one end of the elastic element (40) abuts against the insulating sleeve (30), and the other opposite end abuts against one end of the inner core (20), and the other opposite end of the inner core (20) abuts against the battery compartment cover (50). The resistance measuring element (60) has its positive and negative terminals electrically connected to the housing (10) and the inner core (20) respectively. When the battery compartment cover (50) is threaded onto the external thread (14), the resistance measuring element (60) is connected to the resistance measuring circuit formed by the housing (10), the battery compartment cover (50) and the inner core (20).

2. The resistance tester for the battery compartment cover (50) according to claim 1, characterized in that, The opening end (12) is provided with an annular groove (120), and an annular rubber ring (121) is installed in the annular groove (120). The annular rubber ring (121) is used to abut against the battery compartment cover (50) when the battery compartment cover (50) is threaded onto the external threaded part (14).

3. The resistance tester for the battery compartment cover (50) according to claim 1, characterized in that, The inner core (20) is provided with an insulating guide post (21) extending radially therein, and the housing (10) is provided with a guide groove (15) that is adapted to the insulating guide post (21) and extends axially along the length and width of the housing (10).

4. The resistance tester for the battery compartment cover (50) according to any one of claims 1-3, characterized in that, The inner core (20) is cylindrical, and the elastic element (40) is a cylindrical helical compression spring.

5. The resistance tester for the battery compartment cover (50) according to claim 1, characterized in that, The resistance measuring device (60) is a Kelvin resistance tester.

6. The battery compartment cover (50) resistance tester according to claim 5, characterized in that, The end of the housing (10) away from the open end (12) is a closed end (13). The cable of the positive end of the Kelvin resistance tester passes through the closed end (13) and the through hole on the insulating sleeve (30) in sequence and is electrically connected to the end of the inner core (20) near the elastic element (40). The cable of the negative end of the Kelvin resistance tester is connected to the closed end (13).

7. The battery compartment cover (50) resistance tester according to claim 6, characterized in that, The inner core (20) is provided with a first mounting blind hole (22) for installing a cable and a first screw through hole (23) for installing a flat-head set screw and communicating with the first mounting blind hole (22) at one end near the elastic member (40). The axis of the first mounting blind hole (22) is arranged perpendicular to the axis of the first screw through hole (23).

8. The resistance tester for the battery compartment cover (50) according to claim 6, characterized in that, The closed end (13) of the housing (10) is provided with a second mounting blind hole (16) for installing a cable and a second screw through hole (17) for installing a flat-head set screw and communicating with the second mounting blind hole (16). The axis of the second mounting blind hole (16) is arranged perpendicular to the axis of the second screw through hole (17).

9. The resistance tester for the battery compartment cover (50) according to claim 1, characterized in that, The outer side of the shell wall of the housing (10) is provided with a knurled anti-slip surface.

10. The resistance tester for the battery compartment cover (50) according to claim 1, characterized in that, The shell (10) is a cylindrical shell (10).

Images