Plug-in interface gapless connector

Abstract

The utility model provides a plug interface gapless connector, which comprises a socket and a plug, the socket comprises a fixed conductor assembly, a movable conductor assembly and an elastic assembly, the movable conductor assembly is telescopically and movably arranged in the fixed conductor assembly, and the movable conductor assembly is connected with the fixed conductor assembly through the elastic assembly; the plug comprises a compression conductor assembly; when the plug and the socket are mutually plugged, the compression conductor assembly and the movable conductor assembly are mutually butted and the movable conductor assembly is compressed to overcome the elastic force of the elastic assembly and move to a preset position along the central axis direction of the fixed conductor assembly, so that the compression conductor assembly, the movable conductor assembly and the fixed conductor assembly are mutually compressed and conducted along the axial direction. The inevitable tolerance zone accumulated in the connector design and assembly process is effectively eliminated, and the performance loss caused by interface impedance mismatching and electrical discontinuity due to the fact that the mechanical interface and the electrical interface of the connector cannot coincide after the plug and the socket of the connector are plugged together is eliminated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of connector, specifically, relate to a kind of insertion interface no-gap connector. BACKGROUND

[0002] With the landing of 5G base station and the rapid development of 6G technology, the application field of connector, such as automobile, broadband communication, aerospace, industry, medical treatment, information technology and data communication, military, mobile device, wireless infrastructure, etc., puts forward higher demand on the performance development direction of connector, especially in transmission rate, signal density, signal integrity, power consumption, etc., which puts forward cross-era demand, and then the structure design, quality and precision of connector will directly affect the performance parameters in the whole electrical link.

[0003] As is known to all, each part of the connector inevitably produces error in the machining process due to the precision of machine tool or die forming process, that is, we have to allow the part tolerance band; The tolerance band of the connector finished product after assembly will be produced due to the tolerance band of the part itself and the tolerance band of the auxiliary assembly tool itself; The tolerance band set for compatibility in product design will also be shown in the connector finished product. Then the inevitable tolerance band accumulated in these processes will cause the mechanical interface and electrical interface of the connector to be unable to coincide after the plug and the socket are inserted, resulting in performance loss due to mismatch of interface impedance and electrical discontinuity, which will be amplified and highlighted in high frequency band, causing electrical system disharmony. Therefore, how to eliminate the gap between the plug and the socket interface becomes a major development bottleneck affecting the performance of high frequency band of connector. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of insertion interface no-gap connector, to at least solve the problem that the plug and the socket interface of connector in prior art will produce gap, and then affect the performance of high frequency band of connector.

[0005] In order to achieve the above purpose, the utility model provides a kind of insertion interface no-gap connector, including socket and plug, socket includes: fixed conductor assembly, movable conductor assembly and elastic assembly, movable conductor assembly is telescopically movably arranged in fixed conductor assembly along the direction of the central axis of fixed conductor assembly, movable conductor assembly is connected with fixed conductor assembly by elastic assembly;Plug includes: compression conductor assembly;Wherein, when plug and socket are mutually inserted, compression conductor assembly and movable conductor assembly are mutually docked and compression movable conductor assembly moves to preset position along the direction of the central axis of fixed conductor assembly to overcome the elastic force of elastic assembly to make compression conductor assembly, movable conductor assembly and fixed conductor assembly are mutually compressed along axial direction and conductive.

[0006] Further, the fixed conductor assembly comprises: a first outer conductor, a first cylindrical accommodating cavity is formed in a rear half of the first outer conductor; a first insulator, the first insulator is arranged inside, and a first cylindrical hole is formed in the first insulator along an axial direction thereof; and a first inner conductor, the first inner conductor is arranged in the first cylindrical hole.

[0007] Further, a second cylindrical accommodating cavity is formed in a front half of the first outer conductor, and a first guide hole is formed between the second cylindrical accommodating cavity and the first cylindrical accommodating cavity; the movable conductor assembly comprises: a second outer conductor, the second outer conductor is movably arranged in the second cylindrical accommodating cavity along an axial direction of the first outer conductor; a second cylindrical hole is formed in the second outer conductor along an axial direction thereof; a second insulator, the second insulator is movably arranged in the second cylindrical hole, and a third cylindrical hole is formed in the second insulator along an axial direction thereof; and a second inner conductor, a front end of the second inner conductor extends to a front end of the second outer conductor through the third cylindrical hole, and a rear end of the second inner conductor extends to the first cylindrical hole through the first guide hole and is in sliding contact with the first inner conductor; when the compression conductor assembly and the movable conductor assembly are in abutment with each other, the second outer conductor is pushed and moved in the axial direction and is pressed against the first outer conductor, and the second inner conductor is pushed and moved in the axial direction to a preset position.

[0008] Further, the elastic assembly comprises: a first spring, a first end of the first spring is connected with the rear end of the second inner conductor, and a second end of the first spring is connected with a fixed seat at a rear end of the socket; and a second spring, a first end of the second spring is connected with the second outer conductor, and a second end of the second spring is connected with the first outer conductor; the first spring is used for applying a reverse elastic force to the second inner conductor, and the second spring is used for applying a reverse elastic force to the second outer conductor.

[0009] Further, the compression conductor assembly comprises: a third outer conductor, the third outer conductor is located at a front end of the plug, and a third cylindrical accommodating cavity is formed in the third outer conductor; a third insulator, the third insulator is fixedly arranged in the third cylindrical accommodating cavity, and a fourth cylindrical hole is formed in the third insulator along an axial direction thereof; and a third inner conductor, the third inner conductor is arranged in the fourth cylindrical hole; a front end of the third inner conductor is flush with a front end of the third outer conductor; when the plug and the socket are in abutment with each other, the third outer conductor abuts against and presses the second outer conductor, and the third inner conductor abuts against and presses the second inner conductor.

[0010] Further, a ring-shaped limiting groove is formed in the front end of the second outer conductor, and a limiting hole is formed in a center of the front end of the third inner conductor; when the plug and the socket are in abutment with each other, the third outer conductor is embedded in the ring-shaped limiting groove and abuts against the second outer conductor, and the head end of the second inner conductor is embedded in the limiting hole and abuts against the third inner conductor.

[0011] Further, the second inner conductor comprises: a rod body structure movably arranged in the third cylindrical hole; a sliding contact structure arranged at the rear end of the rod body structure and in sliding contact with the first inner conductor; and a first end of the first spring connected with the sliding contact structure.

[0012] Further, a limiting partition plate is arranged between the second cylindrical accommodating cavity and the first cylindrical accommodating cavity, a first guide hole is arranged at the center of the limiting partition plate, the second outer conductor has an annular protruding structure at the outer side of the middle part, a second spring is sleeved on the rear part of the second outer conductor, a first end of the second spring is connected with the annular protruding structure, and a second end of the second spring is in abutment with the limiting partition plate.

[0013] The plug-in interface gapless connector of the utility model technical scheme, including socket and plug, socket includes fixed conductor assembly, movable conductor assembly and elastic assembly, movable conductor assembly is arranged in fixed conductor assembly along fixed conductor assembly's central axis direction movably, movable conductor assembly is connected with fixed conductor assembly through elastic assembly, plug includes compression conductor assembly, when plug and socket are mutually inserted, compression conductor assembly and movable conductor assembly mutually butt joint and compression movable conductor assembly overcomes the elasticity of elastic assembly and moves to preset position along fixed conductor assembly's central axis direction to make compression conductor assembly, movable conductor assembly and fixed conductor assembly mutually compress tightly along axial direction and conduct. Thus effectively eliminate the inevitable tolerance band accumulated in the process of connector design and assembly, further eliminate the interface impedance mismatch, electrical discontinuity and performance loss caused by the mechanical interface and electrical interface of the connector after the plug and socket of the connector are inserted, ensure the performance in high frequency band, solve the problem that the interface cooperation of the plug and socket of the connector in the prior art will produce gap, and further affect the high frequency band performance of the connector. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings accompanying the specification of this application form a part hereof, serve to provide further understanding of the present application, and together with the description of the present application, serve to explain the present application. In the drawings:

[0015] Figure 1 is a structure schematic diagram of a non-connected state of a plug-in interface gapless connector according to an embodiment of the present application;

[0016] Figure 2 is a first connection state structure schematic diagram of a plug-in interface gapless connector according to an embodiment of the present application;

[0017] Figure 3 is a second connection state structure schematic diagram of a plug-in interface gapless connector according to an embodiment of the present application;

[0018] Figure 4 is a third connection state structure schematic diagram of a plug-in interface gapless connector according to an embodiment of the present application;

[0019] Figure 5 is a fourth connection state structure schematic diagram of a plug-in interface gapless connector according to an embodiment of the present application.

[0020] Among them, the above-mentioned drawings include the following reference signs:

[0021] 10, socket; 11, fixed conductor assembly; 111, first outer conductor; 1111, limiting partition plate; 1112, first guide hole; 112, first insulator; 113, first inner conductor; 12, movable conductor assembly; 121, second outer conductor; 1211, annular limiting groove; 1212, annular protruding structure; 122, second insulator; 123, second inner conductor; 1231, rod body structure; 1232, sliding contact structure; 13, elastic assembly; 131, first spring; 132, second spring; 20, plug; 21, compression conductor assembly; 211, third outer conductor; 212, third insulator; 213, third inner conductor; 2131, limiting hole. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0023] The embodiment of the present application provides a plug-in interface gapless connector, such as Figures 1 to 5As shown, the socket 10 and the plug 20 are included, the socket 10 includes: a fixed conductor assembly 11, a movable conductor assembly 12 movably arranged in the fixed conductor assembly 11 along the central axis direction of the fixed conductor assembly 11, and an elastic assembly 13 connecting the movable conductor assembly 12 and the fixed conductor assembly 11; the plug 20 includes: a compression conductor assembly 21; when the plug 20 and the socket 10 are inserted into each other, the compression conductor assembly 21 and the movable conductor assembly 12 are mutually butted and the movable conductor assembly 12 is compressed to overcome the elastic force of the elastic assembly 13 and move to a preset position along the central axis direction of the fixed conductor assembly 11, so that the compression conductor assembly 21, the movable conductor assembly 12 and the fixed conductor assembly 11 are pressed and conduct along the axial direction. Thus, the inevitable tolerance band accumulated in the design and assembly process of the connector is effectively eliminated, and the interface impedance mismatch and electrical discontinuity caused by the mechanical interface and electrical interface of the plug 20 and the socket 10 of the connector after being inserted into each other are eliminated, and the performance loss is eliminated, the performance in the high frequency band is ensured, and the problem that the interface of the plug and the socket of the connector in the prior art will produce a gap, thereby affecting the performance of the connector in the high frequency band is solved.

[0024] In specific implementation, the fixed conductor assembly 11 includes a first outer conductor 111, a first insulator 112 and a first inner conductor 113, the inside of the rear half of the first outer conductor 111 forms a first cylindrical receiving cavity, and the inside of the front half of the first outer conductor 111 forms a second cylindrical receiving cavity; the diameter of the rear half of the first outer conductor 111 is greater than the diameter of the front half of the first outer conductor 111, so that the diameter of the first cylindrical receiving cavity is greater than the diameter of the second cylindrical receiving cavity; the first insulator 112 is arranged in the first cylindrical receiving cavity, and a first cylindrical hole is formed in the first insulator 112 along the central axis direction thereof; and the first inner conductor 113 is arranged in the first cylindrical hole. The first inner conductor 113 is a cylindrical structure.

[0025] Further, a limiting partition plate 1111 is arranged between the second cylindrical receiving cavity and the first cylindrical receiving cavity, a first guide hole 1112 is formed between the second cylindrical receiving cavity and the first cylindrical receiving cavity, and the first guide hole 1112 is formed at the center of the limiting partition plate 1111. The fixed conductor assembly 11 is arranged in a combined structure of the first outer conductor 111, the first insulator 112 and the first inner conductor 113, the first outer conductor 111 and the first inner conductor 113 are insulated from each other by the first insulator 112, and the first outer conductor 111 and the first inner conductor 113 are respectively conductive with the plug 20 through the movable conductor assembly 12.

[0026] The movable conductor assembly 12 comprises a second outer conductor 121, a second insulator 122 and a second inner conductor 123. The second outer conductor 121 is movably arranged in the second cylindrical accommodating cavity along the axial direction of the first outer conductor 111. The second outer conductor 121 is provided with a second cylindrical hole along the axial direction thereof. The second insulator 122 is movably arranged in the second cylindrical hole. The second insulator 122 is provided with a third cylindrical hole along the axial direction thereof. The front end of the second inner conductor 123 extends to the front end of the second outer conductor 121 through the third cylindrical hole. The rear end of the second inner conductor 123 extends to the first cylindrical hole through the first guide hole and is in sliding contact with the first inner conductor 113, so as to realize the conduction of the inner conductor. When the compression conductor assembly 21 and the movable conductor assembly 12 are in mutual abutment, the second outer conductor 121 is pushed and moved in the axial direction and is in abutment with the first outer conductor 111. At the same time, the second inner conductor 123 is pushed and moved in the axial direction to a preset position, so that the rear end of the second inner conductor 123 is always in contact with the inner side wall of the cylindrical structure of the first inner conductor 113 to realize the conduction and effectively eliminate the tolerance zone formed by the interface gap, thereby improving the performance in the high frequency band.

[0027] Further, the elastic assembly 13 comprises a first spring 131 and a second spring 132. The first end of the first spring 131 is connected with the rear end of the second inner conductor 123. The second end of the first spring 131 is connected with the fixed seat at the rear end of the socket 10. The first spring 131 is used to apply a reverse elastic force to the second inner conductor 123, so that the front end of the second inner conductor 123 can be in abutment with the corresponding part of the compression conductor assembly 21 of the plug 20 when the plug 20 is inserted into the socket 10, thereby eliminating the interface gap. The first end of the second spring 132 is connected with the second outer conductor 121. The second end of the second spring 132 is connected with the first outer conductor 111. The second spring 132 is used to apply a reverse elastic force to the second outer conductor 121, so that the second outer conductor 121 can be in abutment with the corresponding part of the compression conductor assembly 21 of the plug 20 when the plug 20 is inserted into the socket 10, thereby eliminating the interface gap.

[0028] Further, the second inner conductor 123 comprises a rod structure 1231 and a sliding contact structure 1232, the rod structure 1231 is movably arranged in the third cylindrical hole; the sliding contact structure 1232 is arranged at the rear end of the rod structure 1231 and is in sliding contact with the first inner conductor 113 to keep the conduction state; wherein the first end of the first spring 131 is connected with the rear end of the sliding contact structure 1232; the second outer conductor 121 has an annular protruding structure 1212 at the middle outer side, the second spring 132 is sleeved on the rear part of the second outer conductor 121, the first end of the second spring 132 is clamped with the annular protruding structure 1212, and the second end of the second spring 132 is abutted with the limiting partition plate 1111; when the plug 20 is inserted into the socket 10, the compression conductor assembly 21 pushes the sliding contact structure 1232 through the rod structure 1231 and compresses the first spring 131, the first spring 131 applies a reverse elastic force to the rod structure 1231 to make the rod structure 1231 and the corresponding part of the compression conductor assembly 21 tightly pressed; at the same time, the compression conductor assembly 21 compresses the second spring 132 through the annular protruding structure 1212 of the second outer conductor 121, and the second spring 132 applies a reverse elastic force to the second outer conductor 121 to make the second outer conductor 121 and the corresponding part of the compression conductor assembly 21 tightly pressed.

[0029] Further, the compression conductor assembly 21 comprises a third outer conductor 211, a third insulator 212 and a third inner conductor 213, the third outer conductor 211 is located at the front end of the plug 20, and the inside of the third outer conductor 211 forms a third cylindrical accommodating cavity; the third insulator 212 is fixedly arranged in the third cylindrical accommodating cavity, and the third insulator 212 is provided with a fourth cylindrical hole along the axial direction thereof; the third inner conductor 213 is arranged in the fourth cylindrical hole, so that the third outer conductor 211 and the third inner conductor 213 are insulated and separated from each other through the third insulator 212; the front end of the third inner conductor 213 is flush with the front end of the third outer conductor 211; when the plug 20 is inserted into the socket 10, the third outer conductor 211 abuts against and extrudes the second outer conductor 121 to make the outer conductors conduct each other and eliminate the interface gap, and the third inner conductor 213 abuts against and extrudes the second inner conductor 123 to make the inner conductors conduct each other and eliminate the interface gap.

[0030] Further, the front end of the second outer conductor 121 is provided with an annular limiting groove 1211, and the front end of the third inner conductor 213 is provided with a limiting hole 2131; when the plug 20 and the socket 10 are mutually inserted, the third outer conductor 211 is embedded in the annular limiting groove 1211 and abuts against and pushes the second outer conductor 121; the head end of the second inner conductor 123 is embedded in the limiting hole 2131 and abuts against the third inner conductor 213, so that the third inner conductor 213 pushes the second inner conductor 123. By providing the annular limiting groove 1211 and the limiting hole 2131, the gap between the third outer conductor 211 and the second outer conductor 121 and the gap between the third inner conductor 213 and the second inner conductor 123 are further eliminated.

[0031] Specifically, as shown in Figure 2 , the plug 20 and the socket 10 are ready to be inserted, under the action of an axial external force, the third outer conductor 211 enters the annular limiting groove 1211, and the front end of the rod body structure 1231 of the second inner conductor 123 is inserted into the limiting hole 2131 at the front end of the third inner conductor 213.

[0032] As shown in Figure 3 , under the continuous action of the axial external force, the third outer conductor 211 enters the second outer conductor 121 through the annular limiting groove 1211, at this time, the front end face of the third outer conductor 211 is in contact with the bottom face of the annular limiting groove 1211, and the outer conductor insertion is completed; at the same time, the rod body structure 1231 of the second inner conductor 123 enters the third inner conductor 213 through the limiting hole 2131, the front end of the rod body structure 1231 is a hemispherical structure, the end face at the bottom of the hemispherical structure is in contact with the front end face of the third inner conductor 213, the inner conductor insertion is completed, and finally the connector interface gapless insertion is completed.

[0033] As shown in Figure 4 and Figure 5As shown, under the continuous axial external force, the plug 20 continues to advance towards the socket 10, the third outer conductor 211 is moved left by the plug 20, the third outer conductor 211 pushes the bottom surface of the annular limiting groove 1211 through the front end surface to make the second outer conductor 121 continue to move left, the second spring 132 is gradually compressed by the inclined surface of the annular protruding structure 1212 in the middle of the second outer conductor 121, until the rear end surface of the second outer conductor 121 is in close contact with the side wall of the limiting partition plate 1111, the axial physical gap of the outer conductor after insertion is eliminated, and the electrical conduction of the entire outer conductor is completed; at the same time, the third inner conductor 213 is moved left by the plug 20, the third inner conductor 213 pushes the bottom surface of the front end hemisphere structure of the rod body structure 1231 through the front end surface to make the second insulator 122 enter the first guide hole 1112 left, and at the same time, the second inner conductor 123 is moved left, the first spring 131 is gradually compressed by the second inner conductor 123, the axial physical gap of the inner conductor after insertion is eliminated, and the electrical conduction of the entire inner conductor is completed. The mechanism eliminates the axial mismatch gap of the inner conductor and the inner conductor, the outer conductor and the outer conductor during insertion, eliminates the electrical discontinuity, weakens the signal loss, improves the signal transmission quality of the high frequency band, and realizes a gapless connector of the insertion interface.

[0034] The preferred embodiments of the utility model have been described above, and are not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A plug-in interface gapless connector comprising a socket (10) and a plug (20), characterized in that, the socket (10) comprises a fixed conductor assembly (11), a movable conductor assembly (12) movably arranged in the fixed conductor assembly (11) along the central axis direction of the fixed conductor assembly (11), and an elastic assembly (13) connecting the movable conductor assembly (12) and the fixed conductor assembly (11); the plug (20) comprises a compression conductor assembly (21); wherein, when the plug (20) and the socket (10) are mutually plugged, the compression conductor assembly (21) and the movable conductor assembly (12) are mutually butted and the movable conductor assembly (12) is compressed to overcome the elastic force of the elastic assembly (13) and move to a preset position along the central axis direction of the fixed conductor assembly (11) to make the compression conductor assembly (21), the movable conductor assembly (12) and the fixed conductor assembly (11) mutually compressed in the axial direction and conductive.

2. The intermateable connector of claim 1, wherein, the fixed conductor assembly (11) comprises: a first outer conductor (111), the inside of the rear half of the first outer conductor (111) forms a first cylindrical accommodating cavity; a first insulator (112) arranged in the first cylindrical accommodating cavity, the first insulator (112) is provided with a first cylindrical hole along the central axis direction thereof; a first inner conductor (113) arranged in the first cylindrical hole.

3. The intermateable connector of claim 2, wherein, the inside of the front half of the first outer conductor (111) forms a second cylindrical accommodating cavity; a first guide hole is provided between the second cylindrical accommodating cavity and the first cylindrical accommodating cavity; the movable conductor assembly (12) comprises: a second outer conductor (121) movably arranged in the second cylindrical accommodating cavity along the axis direction of the first outer conductor (111); the second outer conductor (121) is provided with a second cylindrical hole along the central axis direction thereof; a second insulator (122) movably arranged in the second cylindrical hole, the second insulator (122) is provided with a third cylindrical hole along the central axis direction thereof; a second inner conductor (123), the front end of the second inner conductor (123) extends to the front end of the second outer conductor (121) through the third cylindrical hole, and the rear end of the second inner conductor (123) extends to the first cylindrical hole through the first guide hole and is in sliding contact with the first inner conductor (113); wherein, when the compression conductor assembly (21) and the movable conductor assembly (12) are mutually butted, the second outer conductor (121) is pushed to move in the axial direction and is compressed with the first outer conductor (111), and the second inner conductor (123) is pushed to move to a preset position in the axial direction.

4. The intermateable connector of claim 3, wherein, the elastic assembly (13) comprises: a first spring (131), the first end of the first spring (131) is connected with the rear end of the second inner conductor (123); the second end of the first spring (131) is connected with the fixed seat at the rear end of the socket (10). A second spring (132) has a first end connected with the second outer conductor (121) and a second end connected with the first outer conductor (111); The first spring (131) is configured to apply a reverse elastic force to the second inner conductor (123), and the second spring (132) is configured to apply a reverse elastic force to the second outer conductor (121).

5. The intermateable connector of claim 4, wherein, The compression conductor assembly (21) comprises: A third outer conductor (211) is located at the front end of the plug (20), and a third cylindrical accommodating cavity is formed in the inside of the third outer conductor (211); A third insulator (212) is fixedly arranged in the third cylindrical accommodating cavity, and a fourth cylindrical hole is formed in the third insulator (212) along the axial direction thereof; A third inner conductor (213) is arranged in the fourth cylindrical hole; When the plug (20) and the socket (10) are mutually plugged, the third outer conductor (211) abuts against the second outer conductor (121) and extrudes the second outer conductor (121), and the third inner conductor (213) abuts against the second inner conductor (123) and extrudes the second inner conductor (123).

6. The intermateable connector of claim 5, wherein, A ring-shaped limiting groove (1211) is formed in the front end of the second outer conductor (121), and a limiting hole (2131) is formed in the center of the front end of the third inner conductor (213); When the plug (20) and the socket (10) are mutually plugged, the third outer conductor (211) is embedded in the ring-shaped limiting groove (1211) and abuts against the second outer conductor (121), and the head end of the second inner conductor (123) is embedded in the limiting hole (2131) and abuts against the third inner conductor (213).

7. The intermateable connector of claim 4, wherein, The second inner conductor (123) comprises: A rod body structure (1231) is movably arranged in the third cylindrical hole; A sliding contact structure (1232) is arranged at the rear end of the rod body structure (1231) and in sliding contact with the first inner conductor (113); The first end of the first spring (131) is connected with the sliding contact structure (1232).

8. The interfacial interposer gapless connector of claim 4, wherein, A limiting partition plate (1111) is arranged between the second cylindrical accommodating cavity and the first cylindrical accommodating cavity, the first guide hole is formed in the center of the limiting partition plate (1111), the second outer conductor (121) has a ring-shaped protruding structure (1212) on the outside of the middle portion thereof, the second spring (132) is sleeved on the rear portion of the second outer conductor (121), the first end of the second spring (132) is clamped with the ring-shaped protruding structure (1212), and the second end of the second spring (132) abuts against the limiting partition plate (1111).

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