Large-current DC power socket

Abstract

The utility model belongs to the technical field of sockets, and particularly relates to a large-current DC power socket, which comprises a hollow base provided with an installation cavity and a plug insertion cavity. The insulating seat is arranged in the mounting cavity; the positive pole center pin comprises a plug connecting part, a positioning part and a wiring part with a bent structure; the plug connecting part penetrates through the insulating seat and extends into the plug insertion cavity, the positioning part penetrates through the insulating seat in an interference fit mode, and the outer side wall of the connecting part abuts against the outer side face of the insulating seat; the negative electrode connecting structure comprises a negative electrode elastic sheet, an outer abutting ring, an inner abutting ring and a limiting block; a plurality of negative elastic pieces are connected between the outer abutting ring and the inner abutting ring in a circumferential array mode, the outer abutting ring abuts against the inner wall of the first abutting groove, the inner abutting ring abuts against the inner wall of the second abutting groove, the middle of each negative elastic piece arches inwards, the inner abutting ring is connected with a limiting block, the insulation base is provided with a clamping groove connected with the limiting block in a clamping mode, and looseness is not prone to occurring.

Description

Technical Field

[0001] The utility model belongs to the technical field of sockets, and in particular relates to a large-current DC power socket. Background Art

[0002] A DC socket is a socket that matches the power supply of electrical equipment. It is composed of a horizontal socket, a vertical socket, an insulating base, a fork-shaped contact spring, and a directional key slot. Two fork-shaped contact springs are located in the center of the base, arranged vertically and horizontally and not connected to each other. One end of the fork-shaped contact spring is a wiring port, exposed on the top surface of the base cylinder, for connecting the input power cord or cable. The other end of the fork-shaped contact spring is composed of two elastic arms interconnected by the base, which are set in the insulating base socket in the direction of DC plug insertion, and are used to supply electrical equipment to make it work normally.

[0003] The DC socket of existing electrical equipment is mainly composed of a power supply body, pins and a center pin of the socket. The power plug is often plugged in and out of the DC socket, and the center pin and the negative pole spring of the socket are easily loosened or shifted, resulting in poor contact between the power plug and the DC socket, affecting the service life and making it inconvenient to power the electrical equipment in the future. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a high-current DC power socket to solve the problem that the existing power plug is often plugged in and out of the DC socket, the center pin and the negative pole spring sheet of the socket are easily loosened or shifted, resulting in poor contact between the power plug and the DC socket, affecting the service life, and making it inconvenient to power electrical equipment in the later stage.

[0005] The technical solution adopted by the utility model is as follows: a high-current DC power socket, comprising a base, the base is hollow, and a connecting installation cavity and a plug insertion cavity are arranged inside the base along the length direction of the base;

[0006] An insulating seat, the insulating seat being arranged in the mounting cavity of the base;

[0007] A positive center needle, the positive center needle comprises a plug connection portion, a positioning portion and a wiring portion in a bent structure; the positioning portion is arranged between the plug connection portion and the wiring portion, the plug connection portion penetrates the insulating seat and extends into the plug insertion cavity, the positioning portion is inserted into the insulating seat with an interference fit, the wiring portion is vertically arranged on a side of the insulating seat away from the plug insertion cavity, the upper end of the connection portion is connected to the outer end of the positioning portion, and the outer side wall of the connection portion abuts against the outer side surface of the insulating seat;

[0008] A negative electrode connection structure, the negative electrode connection structure comprising a negative electrode spring, an outer abutment ring, an inner abutment ring and a limit block;

[0009] A plurality of negative pole spring sheets are connected in a circumferential array between the outer abutment ring and the inner abutment ring, a first abutment groove is provided on the inner circumferential wall of the plug insertion cavity, one end of the outer abutment ring away from the negative pole spring sheet abuts on the inner wall of the first abutment groove, a second abutment groove is provided on the inner end wall of the insulating seat, one end of the inner abutment ring away from the negative pole spring sheet abuts on the inner wall of the second abutment groove, the negative pole spring sheets are circumferentially distributed on the outside of the plug connection part of the positive center needle and are located in the plug insertion cavity, the middle part of the negative pole spring sheet is arched inwardly, a plurality of limit blocks are connected to the end face of the inner abutment ring away from the negative pole spring sheet, corresponding clamping grooves are provided on the insulating seat corresponding to the plurality of limit blocks, and the limit blocks are clamped with the clamping grooves.

[0010] Furthermore, the insulating seat is clamped in the installation cavity of the base through a fastening structure of riveting.

[0011] Furthermore, a straight knurling structure is provided on the outer peripheral wall of the positioning portion, and the positioning portion is arranged in the insulating seat through interference fit of the straight knurling structure.

[0012] Furthermore, two limit blocks are provided and symmetrically arranged on an end surface of the inner abutting ring away from the negative electrode spring sheet, and one end of the two limit blocks away from the negative electrode spring sheet passes through the insulating seat and extends out of the installation cavity and is connected with a pin.

[0013] Furthermore, two clearance grooves are respectively provided on the outer peripheral wall of the insulating seat corresponding to the two limit blocks, and the clearance grooves are connected with the second abutment groove. The limit block includes an abutment portion and a clamping portion, and the abutment portion and the clamping portion are vertically connected. An end face of the abutment portion away from the negative electrode spring sheet abuts on the clearance groove, and the clamping portion is clamped into the clamping groove.

[0014] Furthermore, the cavity wall of the plug insertion cavity of the base is in a cylindrical structure, and a threaded structure is provided on the outer peripheral wall of the cylindrical structure of the base.

[0015] Beneficial effects of the utility model:

[0016] 1. When the plug is inserted into the plug insertion cavity of the base, the negative connection structure adopts a plurality of negative spring sheets arranged in a circumferential array, so that the plurality of negative spring sheets form a ring structure. When the inner side surfaces of the plurality of negative spring sheets arched inwardly abut against the outer peripheral wall of the plug, the contact cross-sectional area between the negative spring sheets and the plug is increased, thereby improving the load power of the product. At the same time, by abutting the inner abutting ring and the outer abutting ring against the inner walls of the first abutting groove and the second abutting groove respectively, the negative spring sheet, the outer abutting ring and the inner abutting ring are limited along the axial direction of the base as a whole, so as to prevent the negative spring sheet, the outer abutting ring and the inner abutting ring from shifting or loosening along the axis of the base, and the plurality of limit blocks connected to the end surface of the inner abutting ring away from the negative spring sheet, and the insulating seat The several corresponding snap-in grooves are snapped in connection, and the inner abutment ring is limited along the circumference of the base to prevent the negative electrode connection structure from shifting along the circumference of the base as a whole, thereby making the negative electrode connection structure less likely to loosen and shift as a whole, thereby improving the stability of the negative electrode spring sheet; by inserting the positioning portion in the insulating seat with an interference fit, the positive electrode center needle is prevented from shifting along the circumference and axial direction of the base, thereby achieving better stability, simple structure and firm connection; in addition, the outer wall of the mating connection portion abuts against the outer surface of the insulating seat, thereby further limiting the positive electrode center needle along the axial direction of the base, thereby better preventing the positive electrode center needle and the negative electrode spring sheet from loosening or shifting when pulling out or plugging in the plug, thereby making the contact between the plug and the DC socket more stable and extending the service life.

[0017] 2. The negative electrode connection structure includes several negative electrode springs arranged in a circumferential array, so that the several negative electrode springs form a ring structure, which increases the cross-sectional area of ​​the contact between the negative electrode metal spring and the conductor. The positive electrode adopts a bent one-piece positive electrode center pin structure, abandoning the traditional positive electrode copper column and terminal riveting structure, thereby increasing the product load power. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model (first viewing angle);

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model (second viewing angle);

[0020] Figure 3 This is a structural schematic diagram of the insulating seat, positive center needle and negative connection structure of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the positive electrode center needle and the negative electrode connection structure of the utility model;

[0022] Figure 5 It is a cross-sectional view of the base of the utility model;

[0023] The attached drawings are marked as follows:

[0024] Base 1, mounting cavity 11, plug insertion cavity 12, first abutment groove 13, threaded structure 14, insulating seat 2, second abutment groove 21, snap-in groove 22, give-way groove 23, positive center pin 3, plug connecting part 31, positioning part 32, wiring part 33, straight knurling structure 34, negative connection structure 4, negative spring piece 41, outer abutment ring 42, inner abutment ring 43, limit block 44, abutment part 441, snap-in part 442, pin 45. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0026] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Embodiment 1:

[0029] like Figure 1 to Figure 5 As shown, a high-current DC power socket includes a base 1, the base 1 is hollow, and the left and right ends are open, and the base 1 is provided with a connecting installation cavity 11 and a plug insertion cavity 12 along the length direction of the base 1;

[0030] An insulating seat 2, wherein the insulating seat 2 is disposed in the mounting cavity 11 of the base 1; in this embodiment, the insulating seat 2 is a plastic seat;

[0031] The positive center needle 3 comprises a plug connection portion 31, a positioning portion 32 and a wiring portion 33 in a bent structure; the connection portion, the positioning portion 32 and the wiring portion 33 in a bent structure are an integrated structure, the positioning portion 32 is arranged between the plug connection portion 31 and the wiring portion 33, the plug connection portion 31 penetrates the insulating seat 2 and extends into the plug insertion cavity 12, the positioning portion 32 is inserted into the insulating seat 2 with an interference fit, the wiring portion 33 is vertically arranged on a side of the insulating seat 2 away from the plug insertion cavity 12, the upper end of the connection portion is connected to the outer end of the positioning portion 32, and the outer side wall of the connection portion abuts against the outer side surface of the insulating seat 2;

[0032] A negative electrode connection structure 4, the negative electrode connection structure 4 comprises a negative electrode spring 41, an outer abutment ring 42, an inner abutment ring 43 and a limit block 44;

[0033] A plurality of negative electrode spring sheets 41 are connected in a circumferential array between the outer abutting ring 42 and the inner abutting ring 43. A first abutting groove 13 is provided on the inner circumferential wall of the plug insertion cavity 12. One end of the outer abutting ring 42 away from the negative electrode spring sheet 41 abuts against the inner wall of the first abutting groove 13. A second abutting groove 21 is provided on the inner end wall of the insulating seat 2. One end of the inner abutting ring 43 away from the negative electrode spring sheet 41 abuts against the inner wall of the second abutting groove 21. The negative electrode spring sheet 41 is circumferentially arranged in an array. Distributed on the outside of the plug connection part 31 of the positive center pin 3 and located in the plug insertion cavity 12, the middle part of the negative spring piece 41 arches inward, and when the plug is inserted, the inner side of the negative spring piece 41 can abut against the outer peripheral wall of the plug, and the inner abutment ring 43 is connected to a plurality of limit blocks 44 at one end face away from the negative spring piece 41, and the insulating seat 2 is provided with a plurality of corresponding limit blocks 44 with matching clamping grooves 22, and the limit blocks 44 are clamped with the clamping grooves 22. In this embodiment, the negative spring piece 41, the outer abutment ring 42 and the inner abutment ring 43 form a crown spring structure, so that the connection strength of the negative pole is better, and the contact area between the negative spring piece 41 and the plug is larger, the overcurrent bearing capacity is high, and the service life is longer. The negative spring piece 41 is a metal spring piece, and the limit block 44 is a sheet-shaped limit block 44.

[0034] As a preferred solution, the insulating seat 2 is clamped in the mounting cavity 11 of the base 1 through a fastening structure of riveting. Specifically, an inner chamfer is circumferentially provided at the edge of the inner wall of the mounting cavity 11 of the insulating seat 2, and an outer chamfer is provided on the outer circumferential wall of the insulating seat 2 corresponding to the inner chamfer. When the end of the insulating seat 2 away from the outer chamfer is clamped into the mounting cavity 11, the outer chamfer squeezes the inner chamfer and extends into the mounting cavity 11 until the outer chamfer and the inner chamfer are attached and abutted, so the fastening structure is simple, the loading and unloading is quick, and the maintenance is convenient.

[0035] As a preferred solution, a straight knurling structure 34 is provided on the outer peripheral wall of the positioning portion 32, and the positioning portion 32 is arranged in the insulating seat 2 through interference fit through the straight knurling structure 34. By providing the straight knurling structure 34 on the outer peripheral wall of the positioning portion 32, the limiting portion and the insulating seat 2 are interference fit, thereby preventing the positive center needle 3 from shifting along the circumference and axis of the base 1, and having better stability, simple structure, and stable connection.

[0036] As a preferred solution, two limit blocks 44 are provided and symmetrically arranged on one end face of the inner abutting ring 43 away from the negative spring sheet 41. One end of the two limit blocks 44 away from the negative spring sheet 41 passes through the insulating seat 2 and extends out of the installation cavity 11 and is connected with a pin 45. In this embodiment, the pin 45 is arranged vertically downward. The symmetrically arranged negative limit blocks 44 enable the inner abutting ring 43 to be more stably clamped on the insulating seat 2, and the arrangement of the pin 45 enables the negative spring sheet 41 to be connected to the circuit board of the electrical device.

[0037] As a preferred embodiment, two clearance grooves 23 are respectively provided on the outer peripheral wall of the insulating seat 2 corresponding to the two limit blocks 44, and the clearance grooves 23 are connected to the second abutting groove 21. The limit block 44 includes an abutting portion 441 and a clamping portion 442, and the abutting portion 441 and the clamping portion 442 are vertically connected. The end face of the abutting portion 441 away from the negative electrode spring sheet 41 abuts on the clearance groove 23, and the clamping portion 442 is clamped into the clamping groove 22. In this embodiment, the side of the clamping portion 442 away from the abutting portion 441 abuts on the side wall of the clearance groove 23. By abutting the limiting portion of the limiting block 44 against the giving way groove 23, the limiting block 44 is limited along the axial direction of the base 1 to prevent the negative electrode connection structure 4 from being displaced axially along the base 1 as a whole. By abutting the clamping portion 442 in the clamping groove 22 and abutting the side of the clamping portion 442 away from the abutting portion 441 against the side wall of the giving way groove 23, the limiting block 44 is limited along the circumferential direction of the base 1 to prevent the negative electrode connection structure 4 from being displaced circumferentially along the base 1 as a whole. As a result, the negative electrode connection structure 4 is not easy to loosen and displace as a whole, thereby improving the stability of the negative electrode spring 41.

[0038] As a preferred solution, the cavity wall of the plug insertion cavity 12 of the base 1 is a cylindrical structure, and a threaded structure 14 is provided on the outer peripheral wall of the cylindrical structure of the base 1. By setting the cavity wall of the plug insertion cavity 12 of the base 1 to be a cylindrical structure, and providing the threaded structure 14 on the outer peripheral wall of the cylindrical structure of the base 1, it is convenient to thread the plug insertion end of the base 1 on the housing that needs to use the power socket, and then by threading a nut on the threaded structure 14 of the base 1, the base 1 can be more stably connected to the housing, with good anti-vibration effect, preventing loosening caused by vibration, and having a better fastening effect, so that when the plug is inserted into the power socket, the base 1 is not easy to loosen or shift.

[0039] In this embodiment, the base 1 is made of copper material, so that the structural strength of the base 1 is better.

[0040] The working mode of the utility model is as follows:

[0041] When in use, the plug insertion end of the base 1 is threadedly connected to the housing that needs to use the power socket, and then a nut is threadedly sleeved on the threaded structure 14 of the base 1, so that the base 1 can be more stably connected to the housing, and the fastening effect is better, so that when the plug is inserted into the power socket or the base 1 is pulled out, the base 1 is not easy to loosen or shift. When the plug is inserted into the plug insertion cavity 12 of the base 1, the negative electrode connection structure 4 adopts a plurality of negative electrode spring pieces 41 arranged in a circumferential array, so that the plurality of negative electrode spring pieces 41 form a ring structure. When the plurality of negative electrode spring pieces 41 are connected to the housing, the negative electrode connection structure 4 is connected to the housing, and the negative electrode connection structure 4 is connected to the housing ... When the inner side surface of the negative spring piece 41 arches inwardly and abuts against the outer peripheral wall of the plug, the contact cross-sectional area between the negative spring piece 41 and the plug is increased, thereby improving the load power of the product. At the same time, by abutting the inner abutting ring 43 and the outer abutting ring 42 against the inner walls of the first abutting groove 13 and the second abutting groove 21 respectively, the negative spring piece 41, the outer abutting ring 42 and the inner abutting ring 43 are limited along the axial direction of the base 1 as a whole, so as to prevent the negative spring piece 41, the outer abutting ring 42 and the inner abutting ring 43 from shifting or loosening along the axis of the base 1, and through the limit block The limiting portion 44 abuts against the clearance groove 23, and the limiting block 44 is limited along the axial direction of the base 1 to prevent the negative electrode connection structure 4 from being displaced axially along the base 1 as a whole. The clamping portion 442 is clamped in the clamping groove 22 and the side of the clamping portion 442 away from the abutting portion 441 abuts against the side wall of the clearance groove 23, so that the limiting block 44 is limited along the circumferential direction of the base 1 to prevent the negative electrode connection structure 4 from being displaced circumferentially along the base 1 as a whole, thereby making it difficult for the negative electrode connection structure 4 to be loosened and displaced as a whole, thereby improving the stability of the negative electrode spring 41; A straight knurled structure 34 is provided on the outer peripheral wall of the positioning portion 32, so that the limiting portion and the insulating seat 2 are interference fit, thereby preventing the positive center needle 3 from being displaced circumferentially and axially along the base 1, with better stability, simple structure and firm connection. In addition, the outer side wall of the matching connection portion abuts against the outer side surface of the insulating seat 2, further limiting the positive center needle 3 axially along the base 1, so that when the plug is unplugged, the positive center needle 3 and the negative spring piece 41 can be better prevented from loosening or displacement, so that the contact between the plug and the DC socket is more stable and the service life is longer.

[0042] The utility model is described in detail above. The description of the specific embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A high current DC power socket, characterized by: include A base (1), the base (1) being hollow, and having an installation cavity (11) and a plug insertion cavity (12) connected to each other arranged inside the base (1) along the length direction of the base (1); An insulating seat (2), wherein the insulating seat (2) is arranged in a mounting cavity (11) of the base (1); A positive center needle (3), the positive center needle (3) comprising a plug connection portion (31), a positioning portion (32) and a wiring portion (33) in a bent structure; the positioning portion (32) is arranged between the plug connection portion (31) and the wiring portion (33); the plug connection portion (31) penetrates the insulating seat (2) and extends into the plug insertion cavity (12); the positioning portion (32) is inserted into the insulating seat (2) with an interference fit; the wiring portion (33) is vertically arranged on a side of the insulating seat (2) away from the plug insertion cavity (12); the upper end of the connection portion is connected to the outer end of the positioning portion (32); and the outer side wall of the connection portion abuts against the outer side surface of the insulating seat (2); A negative electrode connection structure (4), the negative electrode connection structure (4) comprising a negative electrode spring sheet (41), an outer abutment ring (42), an inner abutment ring (43) and a limit block (44); A plurality of negative electrode spring sheets (41) are connected in a circumferential array between the outer abutment ring (42) and the inner abutment ring (43); a first abutment groove (13) is provided on the inner circumferential wall of the plug insertion cavity (12); an end of the outer abutment ring (42) away from the negative electrode spring sheet (41) abuts against the inner wall of the first abutment groove (13); a second abutment groove (21) is provided on the inner end wall of the insulating seat (2); an end of the inner abutment ring (43) away from the negative electrode spring sheet (41) abuts against the inner wall of the second abutment groove (21); ) on the inner wall, the negative pole spring sheet (41) is circumferentially distributed on the outer side of the plug connection portion (31) of the positive pole center needle (3) and is located in the plug insertion cavity (12), the middle part of the negative pole spring sheet (41) is arched inward, and the end surface of the inner abutment ring (43) away from the negative pole spring sheet (41) is connected with a plurality of limit blocks (44), and the insulating seat (2) is provided with corresponding clamping grooves (22) corresponding to the plurality of limit blocks (44), and the limit blocks (44) are clamped with the clamping grooves (22).

2. A high current DC power socket according to claim 1, characterized in that: The insulating seat (2) is clamped in the installation cavity (11) of the base (1) through a fastening structure with a press-riveted closing opening.

3. A high current DC power socket according to claim 1, characterized in that: A straight knurling structure (34) is provided on the outer peripheral wall of the positioning portion (32), and the positioning portion (32) is arranged in the insulating seat (2) through interference fit with the straight knurling structure (34).

4. A high current DC power socket according to claim 1, characterized in that: Two limit blocks (44) are provided and symmetrically arranged on an end surface of the inner abutment ring (43) away from the negative electrode spring sheet (41); one end of the two limit blocks (44) away from the negative electrode spring sheet (41) passes through the insulating seat (2), extends out of the installation cavity (11) and is connected to a pin (45).

5. A high current DC power socket according to claim 4, characterized in that: Two clearance grooves (23) are respectively provided on the outer peripheral wall of the insulating seat (2) corresponding to the two limit blocks (44); the clearance grooves (23) are communicated with the second abutting groove (21); the limit block (44) comprises an abutting portion (441) and a clamping portion (442); the abutting portion (441) and the clamping portion (442) are vertically connected; an end surface of the abutting portion (441) away from the negative electrode spring sheet (41) abuts against the clearance groove (23); and the clamping portion (442) is clamped into the clamping groove (22).

6. A high current DC power socket according to claim 1, characterized in that: The cavity wall of the plug insertion cavity (12) of the base (1) is in a cylindrical structure, and a threaded structure (14) is provided on the outer peripheral wall of the cylindrical structure of the base (1).

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