A compression compatible battery charger

Abstract

A compression-compatible battery charger includes: a housing with a battery slot for loading a battery; and a circuit board assembly installed inside the housing. The circuit board assembly includes a circuit board and at least one pair of positive electrode contacts and a negative electrode post electrically connected to the circuit board. The circuit board is located inside the housing. The at least one pair of positive electrode contacts and negative electrode posts are respectively located on opposite side walls of the battery slot. The positive electrode contacts are fixedly installed on one side wall of the battery slot, and the negative electrode posts are retractably installed on the other side wall of the battery slot. The negative electrode post includes a movable cylinder. A negative electrode contact is installed at the end of the movable cylinder facing the positive electrode contact. A limiting part is provided at the end of the movable cylinder away from the negative electrode contact to limit the negative electrode post from detaching from the housing. A spring is also provided inside the movable cylinder. The two ends of the spring abut against the negative electrode contact and the housing, respectively, to maintain the positive and negative terminals of the battery electrically connected to the positive and negative electrode contacts, respectively.

Description

Technical Field

[0001] This utility model relates to the field of battery charging technology, and in particular to a compression-compatible battery charger. Background Technology

[0002] In the field of battery charging equipment, traditional chargers have long faced prominent problems such as poor compatibility, redundant structure, and low level of intelligence, which seriously restrict user experience and device safety. Early nickel-metal hydride battery chargers generally adopted a fixed-size slot design, supporting only one type of battery, such as AA or AAA batteries. This design required users to equip themselves with multiple chargers for different devices, which not only wasted resources but also increased usage costs and storage difficulties. Taking a traditional four-slot charger as an example, although it can charge four batteries simultaneously, the strictly fixed slot size cannot flexibly adapt to mixed charging scenarios of AA and AAA batteries. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a compression-compatible battery charger. Through a retractable negative electrode post and spring design, it achieves dynamic adaptation to batteries of different sizes. When a battery is inserted, the negative electrode post contracts under pressure, and the spring provides elastic pressure to keep the negative electrode spring contacting the battery's negative terminal. Simultaneously, the positive electrode spring is fixedly in contact with the battery's positive terminal, ensuring a stable electrical connection. The spring's expansion and contraction characteristics compensate for differences in battery size and manufacturing tolerances, and the limiting part prevents the post from detaching, improving structural reliability.

[0004] The objective of this utility model is achieved through the following solution:

[0005] This utility model discloses a compression-compatible battery charger, comprising:

[0006] A housing having a battery slot for holding a battery;

[0007] A circuit board assembly is installed inside the housing. The circuit board assembly includes a circuit board and at least one pair of positive electrode springs and negative electrode posts electrically connected to the circuit board. The circuit board is located inside the housing. At least one pair of positive electrode springs and negative electrode posts are respectively located on opposite side walls of the battery compartment. The positive electrode springs are fixedly installed on one side wall of the battery compartment, and the negative electrode posts are retractably installed on the other side wall of the battery compartment.

[0008] The negative electrode post includes a movable cylinder. A negative electrode spring is mounted on the end of the movable cylinder facing the positive electrode spring. A limiting part is provided at the end of the movable cylinder away from the negative electrode spring. The limiting part is used to prevent the negative electrode post from detaching from the housing.

[0009] The movable cylinder is also equipped with a spring, with its two ends abutting against the negative electrode spring and the housing, respectively, so as to keep the positive and negative electrodes of the battery electrically connected to the positive electrode spring and the negative electrode spring, respectively, when the battery is loaded in the battery slot.

[0010] Furthermore, the movable cylinder is provided with a through hole, the negative electrode spring is installed inside the movable cylinder and the protrusion on the negative electrode spring extends out of the through hole and is electrically connected to the negative electrode of the battery.

[0011] Furthermore, the circuit board assembly also includes a negative electrode connecting piece, and the two ends of the spring respectively abut against the negative electrode spring and the negative electrode connecting piece to achieve an electrical connection between the negative electrode spring and the circuit board.

[0012] Furthermore, the battery slots are provided with separating protrusions to separate adjacent batteries.

[0013] Furthermore, the separating protrusion is provided with an inwardly recessed arc-shaped structure to facilitate the removal of the battery from the battery slot.

[0014] Furthermore, the casing has rounded corner transition structures on both sides of its edge to prevent scratching the casing during battery removal and placement.

[0015] Furthermore, the housing is provided with a limiting groove corresponding to the limiting part, and the limiting part cooperates with the limiting groove to limit the extension and retraction stroke of the movable cylinder.

[0016] Furthermore, the circuit board assembly is also provided with a charging interface for connecting to an external power source.

[0017] Furthermore, the circuit board is also provided with a display screen electrically connected to the circuit board, the display screen being used to display the charging status of the battery.

[0018] Furthermore, it also includes a bottom cover, the housing and the bottom cover are fixedly connected by a snap-fit ​​structure or screws, and a closed receiving space is formed between the housing and the bottom cover, the circuit board assembly is located in the receiving space to protect the circuit board assembly.

[0019] The advantages of this invention lie in its retractable negative electrode post design, which, combined with the elastic pressure of a spring, automatically adapts to battery models of different lengths or thicknesses. When the battery is inserted, the negative electrode post contracts under pressure, while the spring provides a constant thrust, ensuring that the negative electrode spring contact remains firmly against the battery's negative terminal. Simultaneously, the positive electrode spring contact remains firmly in contact with the positive terminal, ensuring a stable electrical connection and effectively solving the problem of poor contact caused by differences in battery size. A limiting part is provided at the end of the movable cylinder of the negative electrode post to prevent the post from excessively extending and detaching from the housing due to spring force, avoiding the risk of mechanical failure. Furthermore, the elastic compensation effect of the spring can offset the deformation or manufacturing tolerances of the battery after long-term use, further improving charging stability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the compression-compatible battery charger of this utility model.

[0022] Figure 2 for Figure 1 A schematic diagram of removing the battery in the compression-type compatible battery charger of this utility model.

[0023] Figure 3 for Figure 2 This utility model provides a schematic diagram of the internal structure of a compression-compatible battery charger.

[0024] Figure 4 for Figure 3 A schematic diagram of the back of the compression-compatible battery charger of this utility model.

[0025] Figure 5 for Figure 4 A partial enlarged view of point A of the compression-type compatible battery charger of this utility model.

[0026] Figure 6 for Figure 3 Exploded view of the compression-compatible battery charger of this utility model. Detailed Implementation

[0027] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. Based on the description of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0028] The terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

[0029] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0030] Please see Figures 1-4 This utility model discloses a compression-compatible battery charger, comprising:

[0031] The housing 10 has battery slots 11 for holding batteries. When a battery is placed in a battery slot 11, the slot wall fits tightly against the battery surface. Friction and reasonable space constraint help maintain a relatively stable position of the battery within the slot. Separating protrusions 111 are provided between the battery slots 11 to separate adjacent batteries. This separation ensures that each battery can be placed independently and stably in its corresponding slot, preventing contact or collision between batteries that could affect charging efficiency or cause safety hazards. The separating protrusions 111 have inwardly recessed arc-shaped structures 112 to facilitate battery removal from the battery slots 11. Users can insert their fingers into the arc-shaped structure 112 and use its edge to hook the battery, easily removing it from the slot. This improves the ease of battery removal and reduces the risk of damage to the battery or charger due to difficulty in removal. Rounded corner transition structures 12 are provided on both sides of the housing 10 to prevent scratching the housing 10 during battery handling. During the process of placing and removing the battery, relative movement inevitably occurs between the battery and the edge of the casing 10. The presence of the rounded corner transition structure 12 makes the edge of the casing 10 rounded and smooth, allowing the battery to glide smoothly when it comes into contact with the edge of the casing 10, avoiding scratches from sharp corners, and thus effectively protecting the appearance integrity of the casing 10 and the battery.

[0032] Please see Figures 3-4A circuit board assembly is installed within the housing 10. The circuit board assembly includes a circuit board 20 and at least one pair of positive electrode contacts 30 and negative electrode posts 40 electrically connected to the circuit board 20. The circuit board 20 is located within the housing 10. At least one pair of positive electrode contacts 30 and negative electrode posts 40 are respectively located on opposite side walls of the battery compartment 11. The positive electrode contacts 30 are fixedly installed on one side wall of the battery compartment 11, and the negative electrode posts 40 are retractably installed on the other side wall of the battery compartment 11. This retractable design allows the charger to accommodate batteries of different lengths, improving the charger's compatibility. When a battery is inserted into the battery compartment 11, the negative electrode post 40 automatically extends or retracts according to the battery's length, ensuring good contact with the battery's negative terminal.

[0033] The negative electrode post 40 includes a movable cylinder 41. A negative electrode spring 43 is installed at one end of the movable cylinder 41 facing the positive electrode spring 30. A limiting part 411 is provided at the end of the movable cylinder 41 away from the negative electrode spring 43. The limiting part 411 is used to restrict the negative electrode post 40 from detaching from the housing 10.

[0034] A spring 42 is also provided inside the movable cylinder 41. The two ends of the spring 42 abut against the negative electrode spring 43 and the housing 10, respectively, to maintain the positive and negative terminals of the battery electrically connected to the positive electrode spring 30 and the negative electrode spring 43, respectively, when a battery is loaded into the battery slot 11. The movable cylinder 41 has a through hole 412. The negative electrode spring 43 is installed inside the movable cylinder 41, and a protrusion 431 on the negative electrode spring 43 extends out of the through hole 412 and is electrically connected to the negative terminal of the battery. When the battery is inserted into the battery slot 11 of the compression-compatible battery charger, the negative terminal of the battery contacts the protrusion 431 of the negative electrode spring 43 on the movable cylinder 41. As the battery is further pushed in, the movable cylinder 41 moves into the charger under the pressure of the battery, simultaneously compressing the spring 42 inside the movable cylinder 41. The elastic force generated by the compression of spring 42 reacts through the movable cylinder 41 onto the negative electrode spring 43, causing the protrusion 431 of the negative electrode spring 43 to press more tightly against the negative terminal of the battery, thereby ensuring a stable and reliable electrical connection between the negative terminal of the battery and the negative electrode spring 43. In this embodiment, depending on the different strokes of the spring 42 compressed within the movable cylinder 41, it can be compatible with either AA or AAA batteries. During charging, current flows through the protrusion 431 of the negative electrode spring 43 into the spring 42 within the movable cylinder 41, and is then conducted through the circuit connected to the spring 42 of the movable cylinder 41 to the charging circuit of the charger, providing charging current to the battery.

[0035] Please see Figure 5The circuit board assembly also includes a negative electrode connecting piece 50. The two ends of the spring 42 abut against the negative electrode spring 43 and the negative electrode connecting piece 50 respectively to achieve electrical connection between the negative electrode spring 43 and the circuit board 20. One end of the negative electrode connecting piece 50 is soldered to the negative electrode pad of the circuit board 20, and the other end extends to the lower region of the movable cylinder 41, providing a stable support surface for the spring 42. The battery negative electrode presses against the protrusion 431 of the negative electrode spring 43, causing the negative electrode spring 43 to contract inwards into the movable cylinder 41; the spring 42 undergoes elastic deformation under pressure, and its rebound force is transmitted to the battery negative electrode through the negative electrode spring 43, ensuring constant contact pressure; simultaneously, the other end of the spring 42 always remains in contact with the negative electrode connecting piece 50, conducting the current from the battery negative electrode through the negative electrode spring 43, spring 42, and negative electrode connecting piece 50 to the circuit board 20, forming a complete charging circuit.

[0036] Please see Figure 3 The circuit board assembly also includes a charging interface 60 for connecting to an external power source. Preferably, the charging interface 60 is a USB or Type-C interface. The charging interface 60 is connected to the circuit board 20 and can be used to connect to an external power source to supply power to the circuit board 20, thereby enabling battery charging.

[0037] The circuit board 20 is also equipped with a display screen 21 electrically connected to the circuit board 20, the display screen 21 being used to display the battery charging status. The circuit board 20 is used to power and control the charging indicator light. The charging indicator light can indicate the charging status, making it convenient for users.

[0038] Please see Figure 2 The housing 10 has a limiting groove 13 corresponding to the limiting part 411. The limiting part 411 cooperates with the limiting groove 13 to limit the extension and retraction stroke of the movable cylinder 41. When the movable cylinder 41 extends or retracts, the limiting part 411 moves along with the movable cylinder 41. Within the normal extension and retraction range of the movable cylinder 41, the limiting part 411 moves freely within the limiting groove 13 without affecting the normal operation of the movable cylinder 41. When the movable cylinder 41 extends or retracts to its maximum stroke, the edge of the limiting groove 13 will block the limiting part 411 from moving further, thereby limiting the further extension and retraction of the movable cylinder 41 and ensuring that the movable cylinder 41 always operates within a safe stroke range.

[0039] The compression-compatible battery charger also includes a bottom cover 70. The housing 10 and the bottom cover 70 are fixedly connected by a snap-fit ​​structure, screws, or welding, forming a closed receiving space between them. The circuit board assembly is located within this receiving space to protect it. When the housing 10 and the bottom cover 70 are fixed together using the above connection method, a closed receiving space is formed between them. The size, shape, and layout of the circuit board assembly and its components are carefully considered to ensure that the circuit board assembly can be accurately placed within the receiving space and maintains an appropriate gap with the housing 10 and the bottom cover 70. This prevents the circuit board assembly from being damaged by compression due to insufficient space, or from shaking when the product is subjected to vibration due to excessive space.

[0040] The compression-compatible battery charger provided by this utility model, through the design of a retractable negative electrode post 40, combined with the elastic pressure of a spring 42, can automatically adapt to battery models of different lengths or thicknesses. When the battery is inserted, the negative electrode post 40 is compressed and contracted, and the spring 42 provides a constant thrust, ensuring that the negative electrode spring 43 always remains in close contact with the negative terminal of the battery, while the positive electrode spring 30 is fixedly in contact with the positive terminal, ensuring a stable electrical connection and effectively solving the problem of poor contact caused by differences in battery size. The end of the movable cylinder 41 of the negative electrode post 40 is provided with a limiting part 411 to prevent the negative electrode post 40 from excessively extending due to the spring force and detaching from the housing 10, avoiding the risk of mechanical failure. In addition, the elastic compensation effect of the spring 42 can offset the deformation or manufacturing tolerances of the battery after long-term use, further improving charging stability.

Claims

1. A compression-compatible battery charger, characterized in that, include: A housing having a battery slot for holding a battery; A circuit board assembly is installed inside the housing. The circuit board assembly includes a circuit board and at least one pair of positive electrode springs and negative electrode posts electrically connected to the circuit board. The circuit board is located inside the housing. At least one pair of positive electrode springs and negative electrode posts are respectively located on opposite side walls of the battery compartment. The positive electrode springs are fixedly installed on one side wall of the battery compartment, and the negative electrode posts are retractably installed on the other side wall of the battery compartment. The negative electrode post includes a movable cylinder. A negative electrode spring is mounted on the end of the movable cylinder facing the positive electrode spring. A limiting part is provided at the end of the movable cylinder away from the negative electrode spring. The limiting part is used to prevent the negative electrode post from detaching from the housing. The movable cylinder is also equipped with a spring, with its two ends abutting against the negative electrode spring and the housing, respectively, so as to keep the positive and negative electrodes of the battery electrically connected to the positive electrode spring and the negative electrode spring, respectively, when the battery is loaded in the battery slot.

2. The compression-compatible battery charger according to claim 1, characterized in that, The movable cylinder has a through hole, and the negative electrode spring is installed inside the movable cylinder with a protrusion on the negative electrode spring extending out of the through hole and electrically connected to the negative electrode of the battery.

3. The compression-compatible battery charger according to claim 1, characterized in that, The circuit board assembly also includes a negative electrode connecting piece, and the two ends of the spring abut against the negative electrode spring and the negative electrode connecting piece respectively to achieve an electrical connection between the negative electrode spring and the circuit board.

4. The compression-compatible battery charger according to claim 1, characterized in that, The battery slots are provided with dividing protrusions to separate adjacent batteries.

5. The compression-compatible battery charger according to claim 4, characterized in that, The dividing protrusion has an inwardly recessed arc-shaped structure to facilitate the removal of the battery from the battery slot.

6. The compression-compatible battery charger according to claim 1, characterized in that, The casing has rounded corner transition structures on both sides of its edge to prevent scratching the casing during battery removal and placement.

7. The compression-compatible battery charger according to claim 1, characterized in that, The housing is provided with a limiting groove corresponding to the limiting part, and the limiting part cooperates with the limiting groove to limit the extension and retraction stroke of the movable cylinder.

8. The compression-compatible battery charger according to claim 1, characterized in that, The circuit board assembly is also provided with a charging interface for connecting to an external power source.

9. The compression-compatible battery charger according to claim 1, characterized in that, The circuit board is also equipped with a display screen electrically connected to the circuit board, and the display screen is used to display the charging status of the battery.

10. The compression-compatible battery charger according to claim 1, characterized in that, It also includes a bottom cover, the housing and the bottom cover are fixedly connected by a snap-fit ​​structure or screws, and a closed receiving space is formed between the housing and the bottom cover, the circuit board assembly is located in the receiving space to protect the circuit board assembly.

Images