An optimized charger connector assembly structure

Abstract

This utility model discloses an optimized charger terminal block assembly structure, belonging to the field of charger manufacturing and assembly. It mainly includes an upper housing, a circuit board, and a lower housing. The upper housing has a mounting groove, and a mating part is fixedly installed at the top of the inner wall of the mounting groove. A terminal block is provided at the mounting groove, and a fastener is integrally formed at its top. The fastener and the mating part have an interference fit. Two sets of pins are symmetrically distributed at the bottom of the inner wall of the mounting groove. The bottom sides of the terminal block have mating grooves that provide guiding space for the assembly of the pins. This optimized charger terminal block assembly structure, by utilizing the interference fit between the mating part and the fastener, and the guiding and engaging structure between the pins and the mating grooves, fixes the terminal block to the upper housing, simplifying the assembly process, reducing manual operation steps, significantly shortening the assembly time of a single product, and improving overall production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of charger manufacturing and assembly technology, and in particular to an optimized charger terminal block assembly structure. Background Technology

[0002] Currently, the existing power tool industry is mature, forming a professional product system that can be widely adapted to diverse work scenarios such as construction and decoration, industrial manufacturing, and home repair. With the rapid development of electronic technology, power tools are continuously iterating and upgrading in terms of performance, energy efficiency, environmental protection, and safety. In particular, DC lithium-ion power tools developed for outdoor work are highly favored in the market due to their advantages such as high portability, stable battery life, and no power cord constraints. In the field of lithium-ion power tool accessories; The mainstream assembly method for existing lithium battery charger connectors is as follows: first, the conductive plates are precisely installed into the connector, and then the assembled connector is securely fixed to the housing with four screws. This traditional assembly method has long been used in industry production due to its reliable connection structure and mature technology.

[0003] However, existing assembly technology for lithium-ion battery charger connectors has certain drawbacks. Due to the multi-stage assembly process and screw fixing method, not only is manual labor required for installing conductive plates and tightening screws, but it also increases the cost of screws and other materials, reducing production efficiency. Secondly, the housing and connector are highly susceptible to deformation during injection molding, transportation, and storage. Once deformation occurs, it can lead to problems such as screw misalignment and stripping during installation, requiring product disassembly and rework, thus increasing the workload and affecting production schedule. Therefore, there is a need for an optimized assembly structure for charger connectors.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0005] This utility model provides an optimized charger connector assembly structure to solve the problems of existing lithium battery charger connector assembly, such as low efficiency and high cost due to multi-stage screw assembly, and installation problems caused by component deformation.

[0006] The present invention adopts the following technical solution: an optimized charger connector assembly structure, including an upper housing, a circuit board and a lower housing, wherein the upper housing has an installation groove, a mating part is fixedly installed at the top of the inner wall of the installation groove, a connector is provided at the installation groove, and a fastener is integrally formed at the top of the fastener and the mating part are interference fit; two sets of pins are symmetrically distributed at the bottom of the inner wall of the installation groove, and mating grooves are provided on both sides of the bottom of the connector to provide guiding space for the assembly of the pins.

[0007] Furthermore, the pin is an L-shaped claw with elasticity, and the end of the pin has a trapezoidal protrusion. The mating groove is provided near the end to fit the protrusion and form a notch for mechanical locking.

[0008] Furthermore, the docking groove is a long, narrow through groove.

[0009] Furthermore, the mounting groove is a concave rectangular cavity, and the pin extends vertically outward from the mounting groove and is arranged perpendicularly to the bottom surface of the cavity.

[0010] Furthermore, the junction box is a rectangular assembly that adapts to the mounting slot.

[0011] Furthermore, the lower housing and the upper housing are a butt-fitting assembly structure. The lower housing has four sets of sleeves integrally formed, and four sets of shafts are fixedly installed at corresponding positions on the upper housing. The inner diameter of the sleeves is adapted to the outer diameter of the corresponding shafts. The lower housing is connected and fixed to the upper housing by screws.

[0012] Furthermore, the circuit board is arranged in the cavity formed by the lower housing and the upper housing, and two sets of symmetrically arranged contact parts are fixedly installed on the terminal frame. The circuit board is connected and fixed to the terminal frame by screws. The lower housing has an integrally formed abutment suitable for contacting the circuit board.

[0013] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects: An optimized charger terminal block assembly structure is proposed. By utilizing the interference fit between the mating parts and the fasteners, as well as the guiding and engaging structure between the pins and the mating slots, the terminal block is fixed to the upper housing, simplifying the assembly process, reducing manual operation steps, significantly shortening the assembly time of a single product, and improving overall production efficiency. Attached Figure Description

[0014] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0015] In the attached diagram: Figure 1 This is an overall schematic diagram of an optimized charger terminal block assembly structure according to this application; Figure 2 for Figure 1 Exploded view; Figure 3 for Figure 2 A schematic diagram of the lower casing structure; Figure 4 for Figure 3 Top view; Figure 5 for Figure 1 A diagram showing the energized state after the right hand presses the locking lever. Figure label: 1. Upper housing; 101. Connecting part; 102. Insert pin; 103. Mounting slot; 104. Shaft; 2. Terminal block; 201. Fastener; 202. Connecting slot; 203. Contact part; 3. Circuit board; 5. Lower housing; 501. Supporting part; 502. Sleeve. Detailed Implementation

[0016] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0017] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0018] Reference Figures 1 to 5 As shown, this utility model embodiment provides an optimized charger connector assembly structure, including an upper housing 1, a circuit board 3, and a lower housing 5; The upper housing 1 has a mounting groove 103, which is a concave rectangular cavity. A docking part 101 is fixedly installed on the top of the inner wall of the mounting groove 103. A wiring bracket 2 is provided at the mounting groove 103. The wiring bracket 2 is a rectangular component adapted to the mounting groove 103. A fastener 201 is integrally formed on its top. The fastener 201 and the docking part 101 are interference fit to ensure a gapless fit. Meanwhile, two sets of pins 102 (with elastic L-shaped claws) are symmetrically distributed at the bottom of the inner wall of the mounting groove 103. The end of the pin 102 has a trapezoidal protrusion, which extends vertically to the outside of the mounting groove 103 and is arranged at 90° to the bottom surface of the cavity. At the same time, docking grooves 202 are provided on both sides of the bottom of the terminal block 2. The docking grooves 202 are long strip-shaped through grooves to reserve assembly guide space for the pins 102. The docking grooves 202 have notches near the end, which are fully adapted to the protrusions of the pins 102 to achieve mechanical locking. During assembly: Step 1: After assembling the conductive sheet into the connector 2, place the connector 2 with the upper housing 1 facing upwards and hold it in place. Insert the connector 2 into the front opening of the mounting groove 103. Using the guiding structure of the mating part 101 and the fastener 201, the connector 2 slides longitudinally along the mounting groove 103, allowing the mating part 101 to gradually embed into the fastener 201, achieving initial surface contact and pre-positioning.

[0019] Step 2: Continue pressing down on the connector 2. Due to the pressure from the connector 2, the pin 102 at the bottom of the mounting groove 103 undergoes elastic deformation along the mating groove 202. When the connector 2 is fully in place, the protrusion at the end of the pin 102 slides to the notch at the end of the mating groove 202. With the help of the elastic restoring force of the pin 102, the protrusion precisely engages with the notch, forming an axial mechanical lock. This limits and fixes the connector 2 within the mounting groove 103 of the upper housing 1, completing the screwless quick assembly.

[0020] Specifically, the lower housing 5 and the upper housing 1 are a butt-fitting assembly structure. The lower housing 5 has four sets of sleeves 502 integrally formed on it, and four sets of shafts 104 are fixedly installed on the upper housing 1 at corresponding positions. The inner diameter of the sleeves 502 is adapted to the outer diameter of the corresponding shafts 104. During assembly, with the upper housing 1 as the reference, the sleeves 502 of the lower housing 5 are aligned with the shafts 104 of the upper housing 1. By axially sleeved, the four sets of sleeves 502 are respectively fitted onto the corresponding shafts 104. The rigid fit between the shafts 104 and the sleeves 502 is utilized, and screws are driven in to achieve a quick connection and fixation between the lower housing 5 and the upper housing 1.

[0021] Specifically, the circuit board 3 is arranged in the cavity formed by the lower housing 5 and the upper housing 1, and two sets of symmetrically arranged contact members 203 are fixedly installed on the terminal frame 2. During assembly, the front of the circuit board 3 is first precisely aligned with the surface of the contact member 203, and the terminal frame 2 is tightened by screws to achieve initial fixation between the circuit board 3 and the terminal frame 2. Meanwhile, a retaining member 501 is integrally formed on the lower housing 5. After the screw fixing operation of the circuit board 3 and the terminal block 2 is completed, the lower housing 5 is assembled. At this time, the retaining member 501 will fit tightly against the back of the circuit board 3, providing support and limiting the circuit board 3 from the back, further enhancing the installation stability of the circuit board 3 in the housing and ensuring the reliability of the electrical connection.

[0022] In summary: During assembly, the first step is the pre-assembly of the connector 2 and the upper housing 1: the upper housing 1 is placed facing upwards, the connector 2 is inserted along the front opening of the mounting groove 103, and the pre-positioning is achieved through the trapezoidal guide structure of the mating part 101 and the fastener 201. The pin 102 is pressed down to elastically engage with the notch of the mating groove 202, forming a three-dimensional mechanical lock, thus completing the screwless quick assembly. Next, the circuit board 3 is installed: the circuit board 3 is attached to the contact 203 of the terminal block 2, and initial fixation is completed with two screws. Finally, the housing is closed: using the shaft 104 of the upper housing 1 as a reference, the sleeve 502 of the lower housing 5 is axially fitted, while the abutment 501 is attached to the back of the circuit board 3, and then reinforced with four circumferentially distributed screws to form a complete charger structure.

[0023] The first stage is the elastic snap-fit ​​connection between the terminal block 2 and the upper housing 1. The L-shaped claw of the pin 102 recovers after deformation, so that the trapezoidal protrusion and the notch form an interference fit to limit axial displacement. The second stage is the rigid screw connection between the circuit board 3 and the terminal block 2. The screw provides preload to ensure reliable conduction of the electrical contact 203. The third stage is the sleeve 502 and shaft 104 structure of the upper and lower housings 5. The four sets of sleeves 502 and shafts 104 are reinforced with circumferential screws to form a rigid frame. To address the inefficiencies and increased costs associated with traditional assembly methods involving multiple steps and screws, this structure employs a screwless, elastic snap-fit ​​assembly method for the junction box 2. This reduces cumbersome processes such as installing conductive sheets and tightening screws, lowering manual operation time and screw material costs. Furthermore, the sleeves 502 of the upper and lower housings 5 ​​and the shaft 104 are secured with a small number of screws, significantly simplifying the assembly process and improving production efficiency compared to traditional all-screw connections.

[0024] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An optimized charger connector assembly structure, comprising an upper housing (1), a circuit board (3), and a lower housing (5), characterized in that: The upper housing (1) is provided with a mounting groove (103), and a connecting piece (101) is fixedly installed on the top of the inner wall of the mounting groove (103). A wiring bracket (2) is provided at the mounting groove (103), and a fastener (201) is integrally formed on its top. The fastener (201) and the connecting piece (101) are interference fit. Two sets of pins (102) are symmetrically distributed at the bottom of the inner wall of the mounting groove (103), and docking grooves (202) are provided on both sides of the bottom of the wiring bracket (2) to provide guiding space for the assembly of the pins (102).

2. An optimized charger terminal block assembly structure according to claim 1, wherein: The pin (102) is an L-shaped claw with elasticity. The end of the pin (102) has a trapezoidal protrusion. The mating groove (202) has a notch near the end that matches the protrusion to form a mechanical locking notch.

3. An optimized charger terminal block assembly structure according to claim 2, wherein: The docking groove (202) is a long strip through groove.

4. An optimized charger terminal block assembly structure according to claim 3, wherein: The mounting groove (103) is a concave rectangular cavity, and the pin (102) extends vertically to the outside of the mounting groove (103) and is arranged perpendicularly to the bottom surface of the cavity.

5. An optimized charger terminal block assembly structure according to claim 4, wherein: The junction box (2) is a rectangular assembly that adapts to the mounting slot (103).

6. An optimized charger terminal block assembly structure according to claim 4, wherein: The lower housing (5) and the upper housing (1) are assembled in a docking manner. Four sets of sleeves (502) are integrally formed on the lower housing (5), and four sets of shafts (104) are fixedly installed on the upper housing (1) at corresponding positions. The inner diameter of the sleeve (502) is adapted to the outer diameter of the corresponding shaft (104). The lower housing (5) is connected and fixed to the upper housing (1) by driving in screws.

7. An optimized charger terminal block assembly structure according to claim 4, wherein: The circuit board (3) is arranged in the cavity formed by the lower housing (5) and the upper housing (1). At the same time, two sets of symmetrically arranged contact parts (203) are fixedly installed on the terminal frame (2). The circuit board (3) is connected and fixed to the terminal frame (2) by driving in screws. The lower housing (5) has an integrally formed abutment part (501) suitable for contacting the circuit board (3).

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