Large-current DC socket

Abstract

The utility model relates to a large-current DC socket, which comprises a cathode wiring assembly, the cathode wiring assembly comprises a cathode base and a plurality of cathode contact pieces arranged on the cathode base, the cathode contact pieces are electrically connected to the cathode base, and the plurality of cathode contact pieces are distributed in a circumferential surrounding manner. The plurality of cathode contact pieces surrounding in the circumferential direction form an accommodating cavity for insertion of a plug, the cathode of the plug abuts against and is electrically connected with the cathode contact pieces, the cathode contact pieces are bent towards the direction close to the center of the accommodating cavity to form a convex surface, the convex surface is bent to form a reinforcing bulge, and the reinforcing bulge is arranged in the accommodating cavity. The reinforcing protrusion protrudes towards the position away from the center of the containing cavity. The reinforcing protrusions can reinforce the structural strength of the negative electrode contact piece and can increase the contact area of the negative electrode contact piece and the plug, and the extrusion anti-falling effect of the negative electrode contact piece on the plug is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of socket, in particular to a DC socket of large current. BACKGROUND

[0002] The DC socket is a direct current power socket, which is used for connecting DC power and DC electrical appliances to realize the transmission and conversion of electric energy. The DC socket is widely used in the fields of audio-visual products, digital products, communication products and computer products.

[0003] The traditional DC socket includes a metal shell, an insulating shell, a positive terminal assembly and a negative terminal assembly. The insulating shell is arranged inside the metal shell, and the positive terminal assembly and the negative terminal assembly are arranged inside the insulating shell. The negative terminal assembly includes a negative contact sheet, which is used for extruding and abutting against the negative pole of the plug. The positive terminal assembly and the negative terminal assembly are used for contacting the plug to realize electrical connection. In the prior art, the number of negative contact sheets is small or the size of the negative contact sheets is small. Due to the structure of the negative contact sheets, the extrusion and anti-dropping effect of the negative contact sheets on the plug is general. CONTENT OF THE INVENTION

[0004] In order to solve the technical problem of the general extrusion and anti-dropping effect of the socket on the plug in the prior art, the present application provides a DC socket of large current.

[0005] The DC socket of large current provided by the present application adopts the following technical scheme:

[0006] The DC socket of large current includes a negative terminal assembly, which includes a negative base and a plurality of negative contact sheets arranged on the negative base. The negative contact sheets are electrically connected to the negative base. The plurality of negative contact sheets are distributed in a circumferential ring. The plurality of circumferential negative contact sheets form a receiving cavity for the plug to be inserted. The negative pole of the plug is in abutment and electrical connection with the negative contact sheets. The negative contact sheets are curved towards the center of the receiving cavity to form a convex surface. The convex surface is bent to form a reinforcing protrusion, which protrudes away from the center of the receiving cavity.

[0007] By adopting the above technical scheme, the negative terminal assembly has a ring structure as a whole, which increases the contact points between the negative contact sheets and the plug, making the connection between the plug and the socket more stable. The negative contact sheets are curved towards the plug, so that the convex surface of the negative contact sheets can extrude and prevent the plug from being dropped. In addition, the convex surface of the negative contact sheets is also provided with a reinforcing protrusion, which can strengthen the structural strength of the negative contact sheets and increase the contact area between the negative contact sheets and the plug, further improving the extrusion and anti-dropping effect of the negative contact sheets on the plug.

[0008] Optionally, the detection spring is further provided with a contact portion, the contact portion is arranged to extend into the avoiding gap and abut against the negative pole of the plug.

[0009] By using the above technical scheme, the detection spring can detect the insertion or extraction state of the plug, so as to switch the internal and external power supply working states and improve the automation degree.

[0010] Optionally, the insulating upper shell and the insulating lower shell are detachably connected, and the negative pole wiring assembly and the detection spring are clamped between the insulating upper shell and the insulating lower shell.

[0011] By using the above technical scheme, the negative pole wiring assembly and the detection spring are clamped between the insulating upper shell and the insulating lower shell, which facilitates the disassembly and assembly of the negative pole wiring assembly and the detection spring.

[0012] Optionally, the insulating lower shell is provided with a positioning block, and the detection spring is provided with a positioning hole, the positioning block is arranged to be inserted into the positioning hole to position the detection spring.

[0013] By using the above technical scheme, the detection spring is positioned by inserting the positioning hole and the positioning block, which has a good positioning effect, and the positioning block and the positioning hole have a simple structure, which is convenient to process and saves processing cost.

[0014] Optionally, the insulating lower shell is provided with a mounting groove, the positioning block is arranged on the bottom wall of the mounting groove, the insulating upper shell is provided with an insertion block, the insertion block is arranged to be inserted into the mounting groove and abut against the detection spring, the insertion block is provided with an avoiding groove, and the avoiding groove is arranged to allow the positioning block to be inserted.

[0015] By using the above technical scheme, the mounting groove, the insertion block and the avoiding groove can be used to fix the detection spring under the premise that the side walls of the insulating upper shell and the insulating lower shell abut against each other, thereby saving the occupied space.

[0016] Optionally, the insulating lower shell is provided with a plurality of locking blocks, the plurality of locking blocks are arranged on both sides of the negative pole base, the negative pole base is provided with a locking groove corresponding to the locking blocks, and the locking blocks are arranged to be inserted into the locking groove to lock the negative pole base.

[0017] By using the above technical scheme, the plurality of locking blocks are arranged on both sides of the negative pole base, and the plurality of locking blocks and the locking groove are inserted into each other, so as to fix the negative pole base on the insulating lower shell and prevent the negative pole base from rotating relative to the insulating lower shell.

[0018] Optionally, the negative pole wiring assembly comprises a negative pole pin arranged on the negative pole base, and the negative pole pin comprises a plurality of negative pole pins.

[0019] By adopting the technical scheme, the plurality of negative electrode pins can increase the overload current intensity.

[0020] Optionally, the insulating lower shell is provided with a mounting seat for sleeving the negative electrode base.

[0021] By adopting the technical scheme, the negative electrode base is sleeved on the mounting seat, the mounting seat can strengthen the structural strength of the negative electrode base, so that the negative electrode base will not be deformed due to the deformation of the negative electrode contact piece, and the mounting seat can play a positioning role in the installation of the negative electrode wiring assembly.

[0022] Optionally, the insulating lower shell is provided with a mounting seat for sleeving the negative electrode base.

[0023] By adopting the technical scheme, the insulating lower shell plays a protection role on part of the structure of the negative electrode pin, so that the negative electrode pin is not completely exposed, the length size of the insertion hole is greater than the width size of the negative electrode pin, the negative electrode base can be sleeved on the mounting seat on the premise that the negative electrode pin is inserted into the insertion hole, and the installation is facilitated.

[0024] Optionally, the metal shell is sleeved on the insulating upper shell and the insulating lower shell, the metal shell is provided with a clamping spring, the insulating upper shell is provided with a clamping groove, the clamping spring is used for extending into the clamping groove and abutting against the groove side wall of the clamping groove, and the insulating lower shell is provided with a limiting boss, the limiting boss is used for abutting against the side wall of the insulating lower shell, so as to realize the fixation of the metal shell, the insulating lower shell and the insulating upper shell.

[0025] By adopting the technical scheme, the metal shell can be sleeved on the insulating upper shell and the insulating lower shell, and the fixation of the metal shell is realized, and the installation is facilitated.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The reinforcing protrusion can strengthen the structural strength of the negative electrode contact piece, and can increase the contact area of the negative electrode contact piece and the plug, and further improve the extrusion anti-disengagement effect of the negative electrode contact piece on the plug.

[0028] 2. The detection spring can detect the insertion or extraction state of the plug, so as to switch the internal and external power supply working states, and improve the automation degree.

[0029] 3. The detection spring can be fixed on the premise that the side walls of the insulating upper shell and the insulating lower shell abut against each other, and the occupied space is saved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1is an exploded view of the positive terminal assembly, the insulating lower shell and the negative terminal assembly in Embodiment 1 of the present application.

[0031] Figure 2 is a side view of the negative terminal assembly in Embodiment 1 of the present application.

[0032] Figure 3 is a structural schematic view of Embodiment 1 of the present application.

[0033] Figure 4 is an exploded view of the metal shell, the insulating upper shell and the insulating lower shell in Embodiment 1 of the present application.

[0034] Figure 5 is an exploded view of the insulating upper shell and the insulating lower shell in Embodiment 1 of the present application.

[0035] Figure 6 is a structural schematic view of the detection spring and the negative terminal assembly in Embodiment 1 of the present application.

[0036] Figure 7 is a sectional view along A-A direction in Embodiment 1. Figure 3

[0037] BRIEF DESCRIPTION OF THE DRAWINGS: 1. Negative terminal assembly; 11. Negative base; 111. Locking groove; 12. Negative contact sheet; 121. Reinforcing protrusion; 122. Containing cavity; 123. Convex surface; 13. Avoidance notch; 14. Negative pin; 2. Detection spring; 21. Contact portion; 22. Positioning hole; 3. Insulating upper shell; 31. Insert block; 311. Avoidance groove; 32. Hook; 33. Clamping groove; 34. Upper shell protrusion; 4. Insulating lower shell; 41. Positioning block; 42. Mounting groove; 43. Locking block; 44. Mounting seat; 441. Mounting hole; 45. Limiting boss; 46. Lower shell groove; 47. Step groove; 48. Insert hole; 5. Metal shell; 51. Clamping spring; 52. Clamping hole; 6. Positive terminal assembly; 7. Inner flange. DETAILED DESCRIPTION

[0038] The following will be described in detail in combination with the accompanying drawings. Figures 1-7 The present application will be further described in detail.

[0039] Embodiment 1 of the present application discloses a DC socket with large current. Referring to Figure 1 and Figure 2 ​The negative electrode wiring assembly 1 comprises a negative electrode base 11 and a plurality of negative electrode contact pieces 12. The negative electrode base 11 is annular, and the plurality of negative electrode contact pieces 12 are integrally formed on the end of the negative electrode base 11 in a circumferential direction. The plurality of negative electrode contact pieces 12 in the circumferential direction form a receiving cavity 122 for inserting a plug. The negative electrode of the plug is in contact with the negative electrode contact piece 12. The negative electrode contact piece 12 is curved towards the center of the receiving cavity 122 to form a convex surface 123. The convex surface 123 is bent to form a reinforcing protrusion 121. The reinforcing protrusion 121 protrudes away from the center of the receiving cavity 122. The axial cross-section of the negative electrode contact piece 12 is in the shape of “W”.

[0040] Referring to Figure 3 With Figure 4 The metal shell 5 is provided with a plug insertion hole on the front side wall. The insulating upper shell 3 and the insulating lower shell 4 are provided with plug insertion slots on the front side walls. The metal shell 5 is sleeved on the insulating upper shell 3 and the insulating lower shell 4. The metal shell 5 is provided with a clamping hole 52 on the side wall. A clamping spring 51 is fixedly installed on the inner wall of the clamping hole 52. One end of the clamping spring 51 is fixedly connected to the rear side wall of the clamping hole 52, and the other end extends in a direction that is closer to the insulating upper shell 3 as it goes forward. The insulating upper shell 3 is provided with a clamping slot 33 on the side wall. The clamping slot 33 is used for the movable end of the clamping spring 51 to extend into. The front inner wall of the clamping slot 33 is used for the movable end of the clamping spring 51 to abut, so as to block the metal shell 5 from sliding forward. The insulating lower shell 4 is integrally formed with a limiting boss 45 on the side wall. The metal shell 5 is provided with an avoiding hole for avoiding the limiting boss 45. The rear side wall of the avoiding hole abuts against the front side wall of the limiting boss 45.

[0041] Referring to Figure 5 The insulating upper shell 3 and the insulating lower shell 4 are detachably connected. The insulating upper shell 3 is integrally formed with an upper shell protrusion 34 on the side wall close to the insulating lower shell 4. The insulating lower shell 4 is provided with a lower shell recess 46 on the side wall close to the insulating upper shell 3. The upper shell protrusion 34 and the lower shell recess 46 are inserted and matched, so as to position the insulating upper shell 3 and the insulating lower shell 4. The insulating upper shell 3 is integrally formed with a clamping hook 32 on the side wall. The insulating lower shell 4 is provided with a stepped slot 47 on the side wall. The insulating upper shell 3 and the insulating lower shell 4 are buckled and connected through the clamping hook 32 and the stepped slot 47.

[0042] Referring to Figure 1 With Figure 4The positive terminal assembly 6, the negative terminal assembly 1 and the detection spring 2 are arranged on the insulating lower shell 4, and the positive terminal assembly 6, the negative terminal assembly 1 and the detection spring 2 are clamped between the insulating upper shell 3 and the insulating lower shell 4. The detection spring 2 in the application plays a detection function after the plug is inserted, and can realize the switching function of internal and external power supply (for example, the notebook computer is powered by the battery without inserting the plug, and the charging is started when the plug is inserted and it is detected that the plug is inserted). In the embodiment, the positive terminal assembly 6 is a PIN pin integrally formed, which can be suitable for large-current and large-power models. The insulating lower shell 4 is integrally formed with a mounting seat 44, the mounting seat 44 is in a cylindrical shape, the mounting seat 44 extends along the front-rear direction, a mounting hole 441 extending along the front-rear direction is formed in the front side wall of the mounting seat 44, and the positive terminal assembly 6 is inserted into the mounting hole 441.

[0043] Referring to Figure 1 , the negative base 11 is sleeved on the mounting seat 44. The negative terminal assembly 1 further includes negative pins 14 integrally formed on the end of the negative base 11 away from the negative contact sheet 12, and the negative pins 14 are provided in two. A plug hole 48 extending along the front-rear direction is formed in the side wall of the insulating lower shell 4, and the length of the plug hole 48 is greater than the width of the negative pin 14, and the plug hole 48 is used for inserting the negative pin 14. The insulating lower shell 4 is integrally formed with a locking block 43 on the side wall close to the insulating upper shell 3, the locking block 43 is provided in two, and the two locking blocks 43 are arranged on the two sides of the axis of the mounting seat 44. The negative base 11 is provided with a locking groove 111 corresponding to the locking block 43 on the side wall close to the insulating lower shell 4 and in front of the negative pin 14, and the locking groove 111 is used for inserting the locking block 43.

[0044] Referring to Figure 5 and Figure 6 , the insulating lower shell 4 is provided with a mounting groove 42 on the side wall close to the insulating upper shell 3, and the mounting groove 42 is integrally formed with a positioning block 41 on the groove bottom wall. The positioning block 41 is provided in two, and the detection spring 2 is provided with a positioning hole 22 corresponding to the positioning block 41. The positioning block 41 and the positioning hole 22 are inserted and matched to position the detection spring 2. The insulating upper shell 3 is provided with a plug block 31 on the side wall close to the insulating lower shell 4, the plug block 31 is used for extending into the mounting groove 42 and abutting against the detection spring 2, and the plug block 31 is provided with an avoiding groove 311 on the side wall close to the insulating lower shell 4. The avoiding groove 311 is used for extending the positioning block 41 to make the side walls of the insulating upper shell 3 and the insulating lower shell 4 abut against each other.

[0045] Referring to Figure 6 , the two adjacent negative contact sheets 12 are formed with an avoiding gap 13, and the detection spring 2 includes a contact part 21 arranged in a bending manner. The convex surface of the contact part 21 faces the avoiding gap 13, and the contact part 21 is used for extending into the avoiding gap 13 and abutting against the negative pole of the plug.

[0046] With reference to Figure 7 The metal shell 5 is provided with an inner flange 7 at the insertion hole, and both ends of the negative contact piece 12 and the reinforcing protrusion 121 are in contact with the metal shell 5. When the plug is inserted, the negative electrode is first in contact with the socket, which can effectively prevent the occurrence of sparking during hot plugging, and is safer to use.

[0047] The implementation principle of the DC socket with large current of the embodiment 1 is as follows: when the DC socket is installed, first, the positive connection assembly 6 is inserted into the installation hole 441 of the installation seat 44, then the negative lead 14 of the negative connection assembly 1 is inserted into the insertion hole 48, and the negative connection assembly 1 is moved backward, so that the negative base 11 is sleeved on the installation seat 44, and the locking groove 111 on the negative base 11 is in plug-in cooperation with the locking block 43. Then the upper shell protrusion 34 of the insulating upper shell 3 is inserted into the lower shell groove 46 on the insulating lower shell 4, at this time, the insulating upper shell 3 and the insulating lower shell 4 are buckled and connected through the clamping hook 32 and the stepped groove 47. Finally, the metal shell 5 is sleeved on the insulating upper shell 3 and the insulating lower shell 4 from front to back, at this time, the clamping spring 51 is clamped into the clamping groove 33, and the front side wall of the limiting protrusion 45 is in contact with the rear side wall of the avoiding hole of the metal shell 5.

[0048] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A high-current DC socket, characterized in that: The device includes a negative terminal assembly (1), which includes a negative terminal base (11) and a plurality of negative terminal contact pieces (12) disposed on the negative terminal base (11). The negative terminal contact pieces (12) are electrically connected to the negative terminal base (11). The plurality of negative terminal contact pieces (12) are distributed in a circumferential manner. The plurality of circumferentially distributed negative terminal contact pieces (12) form a receiving cavity (122) for inserting a plug. The negative terminal of the plug is electrically connected to the negative terminal contact piece (12) by contact. The negative terminal contact piece (12) is bent toward the center of the receiving cavity (122) to form a convex surface (123). A reinforcing protrusion (121) is bent on the convex surface (123). The reinforcing protrusion (121) protrudes toward a position away from the center of the receiving cavity (122).

2. The high-current DC socket according to claim 1, characterized in that: It also includes a detection spring (2), with a clearance notch (13) formed between adjacent negative contact pieces (12). The detection spring (2) includes a contact portion (21) for extending into the clearance notch (13) and contacting the negative terminal of the plug.

3. The high-current DC socket according to claim 2, characterized in that: It also includes an insulating upper housing (3) and an insulating lower housing (4), which are detachably connected. The negative terminal wiring assembly (1) and the detection spring (2) are both sandwiched between the insulating upper housing (3) and the insulating lower housing (4).

4. The high-current DC socket according to claim 3, characterized in that: The insulating lower housing (4) is provided with a positioning block (41), and the detection spring (2) is provided with a positioning hole (22). The positioning block (41) is used to insert and cooperate with the positioning hole (22) to position the detection spring (2).

5. The high-current DC socket according to claim 4, characterized in that: The insulating lower housing (4) is provided with an installation groove (42), the positioning block (41) is provided on the bottom wall of the installation groove (42), the insulating upper housing (3) is provided with an insertion block (31), the insertion block (31) is used to insert into the installation groove (42) and abut against the detection spring (2), the insertion block (31) is provided with a clearance groove (311), the clearance groove (311) is used for the positioning block (41) to be inserted.

6. The high-current DC socket according to claim 3, characterized in that: The insulating lower housing (4) is provided with a plurality of locking blocks (43), which are respectively disposed on both sides of the negative electrode base (11). The negative electrode base (11) is provided with locking grooves (111) corresponding to the locking blocks (43). The locking blocks (43) are used to insert and cooperate with the locking grooves (111) to lock the negative electrode base (11).

7. The high-current DC socket according to claim 3, characterized in that: The negative terminal wiring assembly (1) includes a negative terminal pin (14) disposed on the negative terminal base (11), and the negative terminal pin (14) is provided with a plurality of pins.

8. The high-current DC socket according to claim 7, characterized in that: The insulating lower housing (4) is provided with a mounting base (44) for the negative electrode base (11) to be fitted.

9. The high-current DC socket according to claim 8, characterized in that: The insulating lower housing (4) has a socket (48) for inserting the negative electrode pin (14), and the length of the socket (48) is greater than the width of the negative electrode pin (14).

10. The high-current DC socket according to claim 3, characterized in that: It also includes a metal shell (5), which is fitted onto the upper insulating shell (3) and the lower insulating shell (4). The metal shell (5) is provided with a snap-fit ​​spring (51), and the upper insulating shell (3) is provided with a snap-fit ​​groove (33). The snap-fit ​​spring (51) is used to extend into the snap-fit ​​groove (33) and abut against the side wall of the snap-fit ​​groove (33). The lower insulating shell (4) is provided with a limiting boss (45), which is used to abut against the side wall of the lower insulating shell (4) to achieve the fixation of the metal shell (5) with the lower insulating shell (4) and the upper insulating shell (3).

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