A dual spring tensioning structure for a charger

Abstract

The utility model discloses a double -spring tensile structure for charger relates to charger technical field, including charger upper cover, the upper surface of charger upper cover is equipped with two battery grooves for placing battery at interval, the below of the one side of battery groove of PCB circuit board is provided with two negative pole contact spring leaf, every negative pole contact spring leaf with PCB circuit board all has two negative pole tension spring of parallelly connected, still be provided with auxiliary assembly between negative pole contact spring leaf and the inner wall of the lower surface of charger upper cover, is used for cooperation negative pole tension spring realizes the stable expansion of negative pole contact spring leaf. The utility model discloses through the composite structure of " double negative pole tension spring parallelly connected + auxiliary assembly guiding", effectively solve the defect of the " soft connection easy to sway " of existing single hook spring, ensure that the position of PCB circuit board is stable in the shell, avoid the jam, wear and tear caused by the swing of moving part, guarantee the reliable operation of charger function.

Description

Technical Field

[0001] This utility model relates to the field of charger technology, specifically to a double-spring tension structure for a charger. Background Technology

[0002] In the field of electronic devices, battery chargers are key components for replenishing the energy of devices. They typically employ a sliding connection mechanism, using the elastic force of a spring to keep the contacts in close contact with the battery electrodes, ensuring the stability and reliability of the charging process. Currently, the sliding connection mechanism of such chargers generally adopts a single-hook spring design. This design utilizes the deformation of the spring to cope with external vibrations and impacts: when subjected to external force, the spring deforms first, absorbing most of the energy and prolonging the duration of the impact pulse, thereby significantly reducing the peak acceleration (G-value) transmitted to the PCB circuit board, providing a certain degree of protection for the delicate chips and solder joints on the board.

[0003] However, this "soft connection" method that relies on pure springs has inherent defects. Springs are flexible in all directions and are prone to multi-directional swaying under complex working conditions. This causes the circuit board or contact parts connected to them to swing unexpectedly within the housing. This unstable motion state will cause uneven force on the moving parts, which can easily lead to jamming, abnormal wear, and even poor contact and functional failure in long-term operation, seriously affecting the lifespan and reliability of the charger.

[0004] Therefore, it is necessary to invent a dual-spring tension structure for chargers to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a double-spring tension structure for a charger, which solves the problem of relying on a single-hook spring in the above-mentioned technology. However, a pure spring is "soft" and will wobble in all directions, causing the circuit board or contact parts connected to it to swing unexpectedly in the housing. This unstable motion state will cause uneven force on the moving parts, and long-term operation is prone to problems such as jamming, abnormal wear, and even poor contact and functional failure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a double-spring tension structure for a charger, comprising a charger cover, wherein two battery slots for placing batteries are spaced apart on the upper surface of the charger cover, and a PCB circuit board is fixedly mounted on one end of the lower surface of the charger cover. Two negative electrode contact springs are arranged below the PCB circuit board facing the battery slots. Two negative electrode tension springs are connected in parallel between each negative electrode contact spring and the PCB circuit board. The two negative electrode tension springs are spaced apart along the width direction of the negative electrode contact springs. An auxiliary component is also provided between the negative electrode contact springs and the inner wall of the lower surface of the charger cover. The auxiliary component is located between the two negative electrode tension springs and is used to cooperate with the negative electrode tension springs to achieve stable extension and retraction of the negative electrode contact springs.

[0007] Preferably, both negative contact springs are electrically connected to the PCB circuit board.

[0008] Preferably, each of the negative electrode contact springs has a battery baffle integrally formed at the end away from the PCB circuit board.

[0009] Preferably, a through groove is provided on the side wall of the battery compartment near the negative electrode contact spring, and a battery baffle slides through the through groove and extends to the top of the battery compartment cavity to prevent the battery from coming out of the battery compartment.

[0010] Preferably, the two ends of the negative electrode tension spring are respectively connected and fixed to the negative electrode contact spring and the PCB circuit board.

[0011] Preferably, the auxiliary component includes a mounting plate, an auxiliary sleeve, and a sliding rod. The mounting plate is fixed to one side of the bottom surface of the negative electrode contact spring. One end of the auxiliary sleeve is vertically mounted on the inner wall of the lower surface of the charger cover, and the auxiliary sleeve is coaxial with the mounting plate.

[0012] Preferably, one end of the sliding rod is slidably inserted into the inner hole of the auxiliary sleeve, and the other end is mounted on the mounting plate by bolts. The end face of the sliding rod located inside the auxiliary sleeve is integrally formed with a limiting block, and the outer diameter of the limiting block is adapted to and slidably fitted with the inner diameter of the auxiliary sleeve.

[0013] Preferably, a tension spring is sleeved on the outer side of the rod segment of the sliding rod located inside the auxiliary sleeve. One end of the tension spring is connected to the end face of the limiting block, and the other end is connected to the inner wall of the auxiliary sleeve. The tension spring works in conjunction with the two negative electrode tension springs to drive the negative electrode contact spring to elastically reset the battery baffle.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. This utility model effectively solves the defect of "soft connection and easy shaking" of the existing single hook spring by adopting a composite structure of "parallel connection of double negative pole tension springs + auxiliary component guidance". The double negative pole tension springs are arranged at intervals along the width direction of the negative pole contact spring, which can provide balanced elastic support force from both sides, avoiding unilateral tilting caused by uneven force on a single spring. At the same time, the sliding rod of the auxiliary component and the auxiliary sleeve form a rigid guide, restricting the negative pole contact spring to move only in the extension direction, eliminating its multi-directional swaying under vibration or impact, ensuring the stability of the PCB circuit board in the housing, avoiding jamming and wear of moving parts caused by swaying, and ensuring the reliable operation of the charger. 2. This utility model, through the electrical connection design between the negative electrode contact spring and the PCB circuit board, combined with the elastic support of the double negative electrode tension springs, ensures that the negative electrode contact spring and the battery electrode always maintain stable contact. The balanced tension of the double springs can offset slight positional deviations during battery installation, avoiding contact loosening caused by the elastic decay of a single spring. At the same time, the rigid guidance of the auxiliary components can prevent the negative electrode contact spring from deviating from the electrode position due to shaking during use, solving the problem of charging interruption caused by poor contact in the existing single spring structure, and improving the charging stability and service life of the charger. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall bottom-view three-dimensional structure of this utility model; Figure 3 This is a top view schematic diagram of the negative electrode tension spring of this utility model; Figure 4 This is a cross-sectional three-dimensional structural diagram of the auxiliary component of this utility model; Figure 5 This is a three-dimensional exploded view of the auxiliary sleeve and sliding rod of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Charger top cover; 2. Battery slot; 3. PCB circuit board; 4. Negative contact spring; 5. Battery baffle; 6. Through slot; 7. Negative tension spring; 8. Auxiliary components; 801. Mounting plate; 802. Auxiliary sleeve; 803. Sliding rod; 804. Limiting block; 805. Tension spring. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] This utility model provides, for example Figure 1-5The diagram shows a dual-spring tension structure for a charger, including a charger cover 1. Two battery slots 2 for placing batteries are spaced apart on the upper surface of the charger cover 1. A PCB circuit board 3 is fixedly mounted on one end of the lower surface of the charger cover 1. Two negative contact springs 4 are arranged below the PCB circuit board 3 facing the battery slots 2. Two negative tension springs 7 are connected in parallel between each negative contact spring 4 and the PCB circuit board 3. The two negative tension springs 7 are spaced apart along the width direction of the negative contact springs 4. An auxiliary component 8 is also provided between the negative contact springs 4 and the inner wall of the lower surface of the charger cover 1. The auxiliary component 8 is located between the two negative tension springs 7 and is used to cooperate with the negative tension springs 7 to achieve stable extension and retraction of the negative contact springs 4.

[0019] Both negative contact springs 4 are electrically connected to the PCB circuit board 3. Each negative contact spring 4 has a battery baffle 5 integrally formed at the end away from the PCB circuit board 3. A through groove 6 is opened on the side wall of the battery slot 2 near the negative contact spring 4. The battery baffle 5 slides through the inside of the through groove 6 and extends to the top of the cavity of the battery slot 2 to prevent the battery from coming out of the battery slot 2. The two ends of the negative tension spring 7 are respectively connected and fixed to the negative contact spring 4 and the PCB circuit board 3.

[0020] In this embodiment, the negative contact spring 4 is electrically connected to the PCB circuit board 3, providing a path for current transmission between the battery and the circuit board, ensuring that the battery can normally power the circuit board and realize the power supply of the device. The battery baffle 5, which is integrally formed on the negative contact spring 4, can effectively block the battery after the battery is placed in the battery slot 2, preventing the battery from falling out of the battery slot 2 and ensuring the stable placement of the battery in the device. During the battery installation or removal process, the negative contact spring 4 may be displaced. The negative tension spring 7 can provide elastic force to drive the negative contact spring 4 to drive the battery baffle 5 to elastically reset, so that the battery baffle 5 always stays in a proper position and ensures stable blocking of the battery.

[0021] Auxiliary component 8 includes mounting plate 801, auxiliary sleeve 802, and sliding rod 803. Mounting plate 801 is fixed to one side of the bottom surface of negative contact spring 4. One end of auxiliary sleeve 802 is vertically mounted on the inner wall of the lower surface of charger cover 1, and auxiliary sleeve 802 is coaxial with mounting plate 801. One end of sliding rod 803 is slidably inserted into the inner hole of auxiliary sleeve 802, and the other end is mounted on mounting plate 801 by bolts. Sliding rod 803 is located inside auxiliary sleeve 802. A limiting block 804 is integrally formed on the end face. The outer diameter of the limiting block 804 is adapted to and slidably fitted with the inner diameter of the auxiliary sleeve 802. A tension spring 805 is sleeved on the outer side of the rod segment of the sliding rod 803 located inside the auxiliary sleeve 802. One end of the tension spring 805 is connected to the end face of the limiting block 804, and the other end is connected to the inner wall of the auxiliary sleeve 802. The tension spring 805 works in conjunction with the two negative electrode tension springs 7 to drive the negative electrode contact spring 4 to drive the battery baffle 5 to elastically reset.

[0022] In this embodiment, the sliding rod 803 slides within the auxiliary sleeve 802. This structural design provides precise guidance for the movement of the negative electrode contact spring 4, ensuring that the negative electrode contact spring 4 maintains a stable trajectory during movement, avoiding deviation or wobbling, and improving the stability and reliability of the structure. Furthermore, the limiting block 804 can limit the sliding range of the sliding rod 803 within the auxiliary sleeve 802, preventing the sliding rod 803 from coming out of the auxiliary sleeve 802, thus protecting the auxiliary component 8 and ensuring that the auxiliary component 8 can work normally. When the negative electrode contact spring 4 is displaced by external force, the tension spring 805 and the negative electrode tension spring 7 jointly provide elastic force, driving the negative electrode contact spring 4 to elastically reset the battery baffle 5, enhancing the elastic reset effect, and enabling the battery baffle 5 to return to its initial position more quickly and accurately, further ensuring stable blocking of the battery.

[0023] Working principle of this utility model: Refer to the instruction manual appendix Figure 1-5 When using this utility model, firstly, the battery is pushed into the battery slot 2. The negative terminal of the battery first comes into contact with the battery baffle 5 extending into the top of the slot cavity. The insertion force of the battery is directly transmitted through the battery baffle 5 to the negative terminal contact spring 4 integrally formed with it. Under the continuous pushing force of the battery, the negative terminal contact spring 4 begins to overcome the elastic resistance and move. When the negative contact spring 4 is displaced, the two parallel negative tension springs 7 are compressed or stretched (depending on their initial state), and begin to store elastic potential energy. Meanwhile, the mounting plate 801 fixed to the negative contact spring 4 drives the sliding rod 803 to move, so that the sliding rod 803 slides smoothly in the auxiliary sleeve 802. At the same time, the tension spring 805 sleeved on the sliding rod 803 is further stretched, storing additional potential energy. During the entire displacement process, the sliding cooperation between the auxiliary sleeve 802 and the sliding rod 803 provides precise axial guidance for the entire movement, effectively constraining the movement trajectory of the negative contact spring 4 and the battery baffle 5, preventing them from lateral swaying or deflecting due to force, and ensuring the stability and reliability of the operation. Once the battery is fully installed and the external force is removed, the elastic restoring force provided by the balance established by the coordinated action of the tension spring 805 and the negative electrode tension spring 7 will drive the negative electrode contact spring 4 to press the battery baffle 5 tightly against the negative electrode of the battery. This not only achieves stable electrical contact, but also prevents the battery from coming out of the battery slot 2 through the blocking effect of the battery baffle 5, ensuring the stable placement of the battery in the equipment.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-spring tension structure for a charger, comprising a charger cover (1), characterized in that: The upper surface of the charger cover (1) has two battery slots (2) spaced apart for placing batteries. A PCB circuit board (3) is fixedly installed on one end of the lower surface of the charger cover (1). Two negative contact springs (4) are arranged below the side of the PCB circuit board (3) facing the battery slots (2). Two negative tension springs (7) are connected in parallel between each negative contact spring (4) and the PCB circuit board (3). The two negative tension springs (7) are arranged at intervals along the width direction of the negative contact springs (4). An auxiliary component (8) is also provided between the negative contact springs (4) and the inner wall of the lower surface of the charger cover (1). The auxiliary component (8) is located between the two negative tension springs (7) and is used to cooperate with the negative tension springs (7) to achieve stable extension and retraction of the negative contact springs (4).

2. The dual-spring tension structure for a charger according to claim 1, characterized in that: Both negative contact springs (4) are electrically connected to the PCB circuit board (3).

3. The dual-spring tension structure for a charger according to claim 1, characterized in that: Each of the negative contact springs (4) has a battery baffle (5) integrally formed at the end away from the PCB circuit board (3).

4. The dual-spring tension structure for a charger according to claim 1, characterized in that: The battery slot (2) has a through slot (6) on one side of the slot wall near the negative electrode contact spring (4). A battery baffle (5) slides through the through slot (6) and extends to the top of the slot cavity of the battery slot (2) to prevent the battery from coming out of the battery slot (2).

5. A double-spring tension structure for a charger according to claim 1, characterized in that: The two ends of the negative electrode tension spring (7) are respectively connected and fixed to the negative electrode contact spring (4) and the PCB circuit board (3).

6. The dual-spring tension structure for a charger according to claim 1, characterized in that: The auxiliary component (8) includes a mounting plate (801), an auxiliary sleeve (802), and a sliding rod (803). The mounting plate (801) is fixed to one side of the bottom surface of the negative electrode contact spring (4). One end of the auxiliary sleeve (802) is vertically mounted on the inner wall of the lower surface of the charger cover (1), and the auxiliary sleeve (802) is coaxial with the mounting plate (801).

7. A double-spring tension structure for a charger according to claim 6, characterized in that: One end of the sliding rod (803) is slidably inserted into the inner hole of the auxiliary sleeve (802), and the other end is mounted on the mounting plate (801) by bolts. The end face of the sliding rod (803) located inside the auxiliary sleeve (802) is integrally formed with a limiting block (804). The outer diameter of the limiting block (804) is adapted to and slidably fitted with the inner diameter of the auxiliary sleeve (802).

8. A dual-spring tension structure for a charger according to claim 7, characterized in that: The sliding rod (803) is fitted with a tension spring (805) on the outside of the rod segment inside the auxiliary sleeve (802). One end of the tension spring (805) is connected to the end face of the limiting block (804), and the other end is connected to the inner wall of the auxiliary sleeve (802). The tension spring (805) works in conjunction with the two negative electrode tension springs (7) to drive the negative electrode contact spring (4) to drive the battery baffle (5) to elastically reset.

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