SMB connector

Abstract

The utility model discloses an SMB connector, which comprises an outer conductor, an inner conductor fixed in the outer conductor, and a central conductor fixed in the inner conductor through an insulator, a butt joint groove is formed between the inner conductor and the insulator, a movable crown spring is arranged in the butt joint groove, the crown spring is provided with a plurality of elastic arms, the elastic arms are provided with contact elastic points protruding from outside to inside, and the contact elastic points are connected with the insulator. The contact elastic point deviates from the center of the elastic arm to the port of the butt-joint groove, so that the contact elastic point is located at the middle upper part of the elastic arm and is close to the port of the butt-joint groove, and the distance between the contact elastic point and the butt-joint groove is shortened, so that the buckle of the plug can cross the contact elastic point to be guided below the contact elastic point. The contact elastic point can stably clamp the plug, and the risk of plug clamping function failure is avoided. The crown spring plays a buffering role, the interference force can be released through the stress stretching of the elastic arm, the interference force cannot be transmitted to the inner conductor, the assembly stability of the inner conductor and the outer conductor is ensured, and the inner conductor is prevented from falling off.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of connector product, especially a SMB connector. BACKGROUND

[0002] The main supporting fields of the connector include medical treatment, new energy, traffic, communication, network, IT, household appliance, military electronic product and the like, the rapid development of the product technical level of the supporting field and the rapid growth of its market strongly pull the development of the connector technology. So far, the connector has developed into a series of products with complete types, rich varieties and specifications, various structural types, fine professional direction, obvious industry characteristics and standard system specification.

[0003] The SMB connector is a connector component widely used in the automobile field, and is usually used in systems such as vehicle-mounted camera, vehicle-mounted navigation, automatic driving and auxiliary driving.

[0004] As shown in Figure 1 , it is a SMB connector in the prior art, which comprises a first center conductor 101, a first insulator 102 fixed to the lower end of the first center conductor 101, a first inner conductor 103 sleeved outside the first insulator 102 and located outside the first center conductor 101, and a first outer conductor 104 fixed to the outer periphery of the first inner conductor 103, wherein a first mating groove 105 is formed between the inner wall of the first inner conductor 103 and the first center conductor 101, and a plurality of first elastic arms 106 are formed by opening a slot on the upper end of the first inner conductor 103, the first elastic arms 106 are arranged on the inner side of the upper end of the first elastic arms 106, and the first elastic arms 106 are arranged on the inner side of the upper end of the first elastic arms 106. The first contact elastic point 107 is arranged on the inner side of the upper end of the first elastic arm 106, when the SMB connector is inserted into the plug, the first contact elastic point 107 of the first elastic arm 106 is subjected to long-term vibration stress, which easily causes the fixed fitting structure of the first inner conductor 103 and the first outer conductor 104 to be loose, resulting in the risk of the first inner conductor 103 being separated from the first outer conductor 104.

[0005] As shown in Figures 2-3The diagram shows another SMB connector structure in the prior art, comprising a second center conductor 201, a second insulator 202 fixed to the lower periphery of the second center conductor 201, and a second outer conductor 204 sleeved on the outside of the second insulator 202 and located around the second center conductor 201. A second mating groove 205 is formed between the inner wall of the second outer conductor 204 and the second center conductor 201, and a first crown spring 206 is also provided on the upper inner wall of the second outer conductor 204. The first crown spring 206 has multiple... The second elastic arms 207 are spaced apart, and the middle of the second elastic arm 207 has a second contact spring 207 protruding from the outside to the inside. When the plug 20 is inserted into the second mating groove 205, the plug 20 makes elastic contact with the second contact spring 203 of the first crown spring 206. However, since the second contact spring 203 is located in the middle of the second elastic arm 207, the buckle 200 on the lower periphery of the plug 20 cannot be guided under the second contact spring 107, which poses a risk that the second contact spring 203 will jam the plug 20 and cause the function to fail.

[0006] In view of the above, the inventors propose the following technical solution. Utility Model Content:

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide an SMB connector.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The SMB connector includes an outer conductor, an inner conductor fixed in the outer conductor, and a center conductor fixed in the inner conductor by an insulator. A mating groove is formed between the inner conductor and the insulator. A movable crown spring is provided in the mating groove. The crown spring has multiple spaced elastic arms. Each elastic arm is formed with a contact spring point protruding from the outside to the inside. The contact spring point is offset from the center of the elastic arm toward the port of the mating groove, so that the contact spring point is located in the upper middle part of the elastic arm and close to the port of the mating groove.

[0009] Furthermore, in the above technical solution, the elastic arm includes a short arm body located at the upper part, a long arm body located at the lower part, and a bent contact portion that connects the short arm body and the long arm body and protrudes from the outside to the inside. The inner side of the bent contact portion serves as the contact point, wherein the bending angle of the short arm body is greater than the bending angle of the long arm body.

[0010] Furthermore, in the above technical solution, the crown spring is a non-closed ring shape, which includes a first base and a second base, and a plurality of elastic arms integrally connected between the first base and the second base. The short arm of the elastic arm is integrally connected to the first base and bends from the outside to the inside relative to the first base, and the long arm of the elastic arm is integrally connected to the second base and bends from the outside to the inside relative to the second base.

[0011] Furthermore, in the above technical solution, the inner wall of the docking groove is provided with a movable groove, the vertical width of which is greater than the height of the crown spring, so that the crown spring can move up and down after being installed in the movable groove.

[0012] Furthermore, in the above technical solution, the outer conductor has a first mounting groove extending downward from its upper end, and the bottom of the first mounting groove also has a second mounting groove extending downward; the insulator is provided with a mating hole, the central conductor is inserted and fixed in the mating hole from bottom to top, and the insulator is pressed into the second mounting groove from top to bottom, and the annular rib on the outside of the insulator is engaged and positioned with the inner wall of the second mounting groove; the inner conductor is pressed into the first mounting groove from top to bottom and fastened by interference fit, and the flange formed inside the inner conductor abuts against the step on the outer periphery of the middle part of the insulator to limit the lower end of the insulator in the second mounting groove.

[0013] Furthermore, in the above technical solution, the inner wall of the first mounting groove is provided with a positioning rib, the upper end of which is provided with an inclined guide surface. The positioning rib also contacts the outer side of the inner conductor to tension and fix it. The outer side of the inner conductor is also provided with an annular groove, in which a waterproof ring is installed. The waterproof ring fits against the inner wall of the first mounting groove to form a sealed assembly.

[0014] Furthermore, in the above technical solution, the outer conductor is formed with an outwardly protruding mounting plate, and an annular groove is provided on the mounting plate. A sealing ring is installed in the annular groove, and the sealing ring partially protrudes from the surface of the mounting plate.

[0015] Furthermore, in the above technical solution, the outer conductor is also fitted with a protective cover, which has a plurality of locking arms arranged in a ring at intervals. The locking arms are engaged and positioned with the outer conductor, and the protective cover covers the sealing ring.

[0016] Furthermore, in the above technical solution, the lower end of the outer conductor is formed with a downwardly extending wiring portion, which is coaxial or parallel to the center conductor, making the SMB connector a straight head structure; the wiring portion has a vertically distributed first wire hole for the wire to pass through, which corresponds to the lower end of the center conductor.

[0017] Furthermore, in the above technical solution, the lower end of the outer conductor is formed with a horizontally extending wiring portion, which is perpendicular to the center conductor, making the SMB connector a bent structure; and a second wire hole is provided on one side of the wiring portion, which is horizontally distributed and allows the wires to pass through.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention installs a movable crown spring on the inner conductor for elastic contact with the plug inserted into the mating slot. That is, the crown spring acts as a buffer, dissipating the interference force through the elastic arm of the crown spring under tension. The interference force is not transmitted to the inner conductor, ensuring the assembly stability of the inner and outer conductors and avoiding the risk of the inner conductor detaching. In other words, the present invention does not create a slot in the inner conductor to form a spring arm that contacts the plug; it effectively avoids long-term vibration and stress on the spring arm of the inner conductor, preventing the inner and outer conductors from becoming stuck. This invention eliminates the risk of loose mating structures causing the inner conductor components to detach. Simultaneously, the contact point of the elastic arm is offset from the center of the elastic arm towards the port of the mating groove, placing the contact point in the upper-middle part of the elastic arm and close to the port of the mating groove. This shortens the distance between the contact point and the mating groove, enabling a stable hold and connection between the contact point and the inserted plug. Specifically, the plug's latch can extend beyond the contact point and be guided below it, ensuring the contact point stably holds the plug and avoids the risk of plug malfunction, thus achieving stable electrical conduction. Attached image description:

[0019] Figure 1 This is a structural diagram of an SMB connector in the prior art;

[0020] Figure 2 This is a structural diagram of another type of SMB connector in the prior art;

[0021] Figure 3 This is a structural diagram of an SMB connector and plug assembly with another existing structure.

[0022] Figure 4 This is a perspective view of the present invention;

[0023] Figure 5 This is a perspective view of the present invention from another angle;

[0024] Figure 6 This is a cross-sectional view of the present invention;

[0025] Figure 7 This is an exploded perspective view of the present invention;

[0026] Figure 8 This is a perspective view of the utility model with the protective cover installed;

[0027] Figure 9 This is a perspective view of the crown spring in this utility model;

[0028] Figure 10 This is a perspective view of the present invention and the plug assembly;

[0029] Figure 11 This is a perspective view of another embodiment of the present invention with the protective cover installed;

[0030] Figure 12 This is a cross-sectional view of another embodiment of the present invention. Detailed implementation method:

[0031] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0032] See Figures 4-12 As shown, an SMB connector includes an outer conductor 3, an inner conductor 4 fixed in the outer conductor 3, and a center conductor 6 fixed in the inner conductor 4 by an insulator 5. A mating groove 40 is formed between the inner conductor 4 and the insulator 5 for inserting a plug.

[0033] A movable crown spring 7 is provided within the docking groove 40. The crown spring 7 has multiple spaced elastic arms 71, each with a contact spring point 70 protruding inwards. This contact spring point 70 is offset from the center of the elastic arm 71 towards the port of the docking groove 40, positioning it in the upper-middle part of the elastic arm 71 and close to the port of the docking groove 40. In other words, this invention uses a movable crown spring 7 on the inner conductor 4 for elastic contact with the plug inserted into the docking groove 40. The crown spring 7 acts as a buffer, dissipating interference forces through the tension of the elastic arms 71. The interference force is not transmitted to the inner conductor, ensuring the stability of the inner and outer conductor assembly and avoiding the risk of the inner conductor detaching. This invention does not create a slot in the inner conductor 4 to form the contact between the spring arm and the plug, effectively preventing long-term vibration and stress on the inner conductor's spring arm, which could lead to loosening of the fixed fit between the inner and outer conductors and the risk of the inner conductor component detaching. Furthermore, this invention uses the elastic arm 7... The contact point 70 of the 1 is offset from the center of the elastic arm 71 toward the port of the mating groove 40, so that the contact point 70 is located in the upper middle part of the elastic arm 71 and close to the port of the mating groove 40, thereby shortening the distance between the contact point 70 and the mating groove 40. This allows the contact point 70 to form a stable holding and conduction with the inserted plug 20. Specifically, the latch 200 of the plug 20 can pass over the contact point 70 and be guided below the contact point 70, ensuring that the contact point 70 can stably hold the plug 20, preventing the plug from shaking, improving the conduction quality, and avoiding the risk of the plug 20 failing due to being stuck, thereby achieving a stable electrical conduction.

[0034] The structure of the crown spring 7 will be described in detail below.

[0035] The crown spring 7 is in the form of a non-closed ring (e.g., C-shaped). When it is installed into the mating groove 40, the crown spring 7 is compressed from the outside to the inside to reduce its volume. When the crown spring 7 is fully installed into the mating groove 40, it is stably installed in the mating groove 40 by its elastic force from the inside to the outside.

[0036] The inner wall of the docking groove 40 is provided with a movable groove 401. The vertical width of the movable groove 401 is greater than the height of the crown spring 7, so that after the crown spring 7 is installed in the movable groove 401, it can move up and down. It can provide enough space for the elastic arm 71 of the crown spring 7 to stretch and deform. That is, when the elastic arm 71 is squeezed, the elastic arm 71 will be pressed down to stretch and lengthen. At this time, the height of the entire crown spring 7 will increase / the length will increase, so that the crown spring 7 can move in the movable groove 401, keeping the crown spring 7 in the movable groove 401 and not detaching from the movable groove 401, thus ensuring product quality.

[0037] The crown spring 7 includes a first base 72 and a second base 73, and a plurality of elastic arms 71 integrally connected between the first base 72 and the second base 73. The short arm 711 of the elastic arm 71 is integrally connected to the first base 72 and bends from the outside to the inside relative to the first base 72. The long arm 712 of the elastic arm 71 is integrally connected to the second base 73 and bends from the outside to the inside relative to the second base 73.

[0038] The first base 72 and the second base 73 are both non-closed annular (e.g., C-shaped) and they are in elastic abutment contact with the movable groove 401 to ensure that the entire crown spring 7 is stably installed in the movable groove 401.

[0039] The elastic arm 71 includes a short arm 711 at the upper part, a long arm 712 at the lower part, and a bent contact portion 713 that connects the short arm 711 and the long arm 712 and protrudes from the outside to the inside. The inner surface of the bent contact portion 713 serves as the contact spring point 70. The bending angle of the short arm 711 is greater than that of the long arm 712, which enables the bent contact portion 713 and the contact spring point 70 on its inner surface to form a stronger elastic deformation capability and to form a stable elastic contact with the plug.

[0040] The assembly structure of the outer conductor 3, inner conductor 4, insulator 5 and center conductor 6 is as follows:

[0041] The insulator 5 is provided with a mating hole 51, and the center conductor 6 is inserted and fixed in the mating hole 51 from bottom to top. The outer surface of the center conductor 6 is provided with barbs 61, which are engaged and fixed with the inner wall of the mating hole 51, so that the center conductor 6 and the insulator 5 form a stable assembly and avoid the risk of the center conductor 6 moving backward relative to the insulator 5. The front end of the center conductor 6 is also slit to form a plurality of elastic petals 62, and an elastic conductive space 60 is formed between the elastic petals 62. The upper opening of the elastic conductive space 60 is exposed on the upper surface of the insulator 5. The outer conductor 3 has a first mounting groove 31 extending downward from its upper end, and a second mounting groove extending downward from the bottom of the first mounting groove 31. The insulator 5 is pressed into the second mounting groove from top to bottom, and the annular rib 52 on the outside of the insulator 5 is engaged and positioned with the inner wall of the second mounting groove to ensure the stability of the assembly structure. The inner conductor 4 is pressed into the first mounting groove 31 from top to bottom and is fastened by interference fit to ensure that the inner conductor 4 is stably installed in the outer conductor 3. The flange 41 formed inside the inner conductor 4 abuts against the step 53 on the outer periphery of the middle part of the insulator 5 to limit the lower end of the insulator 5 in the second mounting groove, thereby firmly installing the insulator 5 in the outer conductor 3, so that the outer conductor 3, inner conductor 4, insulator 5 and center conductor 6 form a stable assembly.

[0042] The first mounting groove 31 has a positioning rib 311 on its inner wall. The upper end of the positioning rib 311 has an inclined guide surface 312. The positioning rib 311 also contacts the outer surface of the inner conductor 4 for tensioning and fixing, thereby ensuring a more stable assembly of the inner conductor 4 and the outer conductor 3 and preventing loosening or detachment. The inclined guide surface 312 has a good guiding function. As the inner conductor 4 is continuously inserted into the first mounting groove 31, it first contacts the inclined guide surface 312. The inclined guide surface 312 continuously guides the inner conductor 4, ensuring that its outer surface smoothly contacts the inner surface of the positioning rib 311, thus guaranteeing the tensioning and fixing effect.

[0043] The inner conductor 4 is also provided with an annular groove 42, which contains a waterproof ring. The waterproof ring fits against the inner wall of the first mounting groove 31 to form a sealed assembly, thereby improving the waterproof effect.

[0044] The outer conductor 3 has an outwardly protruding mounting plate 33 formed on its exterior. This mounting plate 33 can be used for fixed connection with the housing. The mounting plate 33 is fitted together and screwed onto the housing through the through holes 330 on the mounting plate 33. The mounting plate 33 has an annular groove 331, within which a sealing ring 34 is installed. The sealing ring 34 partially protrudes from the surface of the mounting plate 33 and contacts the surface of the housing, forming a sealed assembly with the housing for good waterproofing.

[0045] Combination Figure 8 As shown, the outer conductor 3 is also fitted with a protective cover 8. When not in use, the protective cover 8 can be fitted onto the outer conductor 3 and placed over the sealing ring 34 to prevent the sealing ring 34 from coming off, thus providing good protection. Specifically, the protective cover 8 has several ring-shaped, spaced-apart locking arms 81. These locking arms 81 engage and position with the outer conductor 3, ensuring the stability of the assembly structure and allowing the protective cover 8 to be stably installed on the outer conductor 3, with the protective cover 8 covering the sealing ring 34.

[0046] In one embodiment, combined Figure 10 As shown, the lower end of the outer conductor 3 is formed with a downwardly extending wiring portion 35, which is coaxial or parallel to the center conductor 6, making the SMB connector a straight head structure; the wiring portion 35 has a vertically distributed first wire hole 351 for wires to pass through, which corresponds to the lower end of the center conductor 6.

[0047] In another embodiment, combined with Figures 11-12 As shown, the lower end of the outer conductor 3 has a horizontally extending wiring portion 35, which is perpendicular to the center conductor 6, making the SMB connector a bent structure. An assembly groove is provided at the lower end of the wiring portion 35, and a second wire hole 353 is horizontally distributed on one side of the wiring portion 35 for the wire to pass through. After passing through the second wire hole 353, the wire is welded and fixed to the lower end of the center conductor 6. Adhesive is injected into the assembly groove to form a sealant that wraps around the lower end of the center conductor 6 and the wire, providing excellent waterproofing and ensuring the stability of the entire welded structure. The lower opening of the assembly groove is also sealed with a shielding cover, providing good shielding.

[0048] In summary, this invention features a movable crown spring 7 on the inner conductor 4 for elastic contact with the plug inserted into the mating slot 40. This crown spring 7 acts as a buffer, dissipating interference forces through the stretching of its elastic arm 71. The interference force is not transmitted to the inner conductor, ensuring the stability of the inner and outer conductor assembly and avoiding the risk of the inner conductor detaching. This invention does not involve creating a slot in the inner conductor 4 to form the elastic arm contacting the plug, effectively preventing long-term vibration and stress on the inner conductor's elastic arm, which could lead to loosening of the fixed fit between the inner and outer conductors and the risk of the inner conductor component detaching. Furthermore, this invention incorporates an elastic arm... The contact point 70 of the elastic arm 71 is offset from the center of the elastic arm 71 toward the port of the mating groove 40, so that the contact point 70 is located in the upper middle part of the elastic arm 71 and close to the port of the mating groove 40, thereby shortening the distance between the contact point 70 and the mating groove 40. This allows the contact point 70 to form a stable holding and conduction with the inserted plug 20. Specifically, the latch 200 of the plug 20 can pass over the contact point 70 and be guided below the contact point 70, ensuring that the contact point 70 can stably hold the plug 20, preventing the plug from shaking, improving the conduction quality, avoiding the risk of the plug 20 failing due to being stuck, and thus achieving a stable electrical conduction.

[0049] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. An SMB connector comprising an outer conductor (3), an inner conductor (4) fixedly disposed within the outer conductor (3), and a center conductor (6) fixedly mounted within the inner conductor (4) via an insulator (5), wherein a mating groove (40) is formed between the inner conductor (4) and the insulator (5), characterized in that: A movable crown spring (7) is provided inside the docking groove (40). The crown spring (7) has a plurality of spaced elastic arms (71). The elastic arms (71) are formed with contact spring points (70) protruding from the outside to the inside. The contact spring points (70) are offset from the center of the elastic arm (71) toward the port of the docking groove (40), so that the contact spring points (70) are located in the upper middle part of the elastic arm (71) and close to the port of the docking groove (40).

2. An SMB connector according to claim 1, characterized in that: The elastic arm (71) includes a short arm body (711) located at the upper part, a long arm body (712) located at the lower part, and a bent contact portion (713) that connects the short arm body (711) and the long arm body (712) and protrudes from the outside to the inside. The inner side of the bent contact portion (713) serves as the contact point (70). The bending angle of the short arm body (711) is greater than the bending angle of the long arm body (712).

3. An SMB connector according to claim 2, characterized in that: The crown spring (7) is a non-closed ring, which includes a first base (72) and a second base (73) and a plurality of elastic arms (71) integrally connected between the first base (72) and the second base (73). The short arm (711) of the elastic arm (71) is integrally connected to the first base (72) and bends from the outside to the inside relative to the first base (72). The long arm (712) of the elastic arm (71) is integrally connected to the second base (73) and bends from the outside to the inside relative to the second base (73).

4. An SMB connector according to claim 3, characterized in that: The inner wall of the docking groove (40) is provided with a movable groove (401). The vertical width of the movable groove (401) is greater than the height of the crown spring (7), so that the crown spring (7) can move up and down after being installed in the movable groove (401).

5. An SMB connector according to any one of claims 1-4, characterized in that: The outer conductor (3) has a first mounting groove (31) extending downward from its upper end, and the bottom of the first mounting groove (31) also has a second mounting groove extending downward; the insulator (5) is provided with a mating hole (51), the center conductor (6) is inserted and fixed in the mating hole (51) from bottom to top, and the insulator (5) is pressed into the second mounting groove from top to bottom, and the annular rib (52) on the outside of the insulator (5) is held and positioned by the inner wall of the second mounting groove, the inner conductor (4) is pressed into the first mounting groove (31) from top to bottom and is fastened by interference fit, and the flange (41) formed inside the inner conductor (4) abuts against the step (53) on the outer periphery of the middle part of the insulator (5) to limit the lower end of the insulator (5) in the second mounting groove.

6. An SMB connector according to claim 5, characterized in that: The inner wall of the first mounting groove (31) is provided with a positioning rib (311), and the upper end of the positioning rib (311) is provided with an inclined guide surface (312). The positioning rib (311) also contacts the outer side of the inner conductor (4) to tension and fix it. The outer side of the inner conductor (4) is also provided with an annular groove (42), and a waterproof ring is installed in the annular groove (42). The waterproof ring fits against the inner wall of the first mounting groove (31) to form a sealed assembly.

7. An SMB connector according to any one of claims 1-4, characterized in that: The outer conductor (3) has an outwardly protruding mounting plate (33) formed on its exterior. The mounting plate (33) has an annular groove (331) and a sealing ring (34) is installed inside the annular groove (331). The sealing ring (34) is partially protruding from the surface of the mounting plate (33).

8. An SMB connector according to claim 7, characterized in that: The outer conductor (3) is also fitted with a protective cover (8), which has a number of ring-shaped interlocking arms (81) on it. The interlocking arms (81) are engaged and positioned with the outer conductor (3), and the protective cover (8) covers the sealing ring (34).

9. An SMB connector according to any one of claims 1-4, characterized in that: The lower end of the outer conductor (3) is formed with a downwardly extending wiring portion (35), which is coaxial or parallel to the center conductor (6), making the SMB connector a straight head structure; the wiring portion (35) has a vertically distributed first wire hole (351) for wires to pass through, which corresponds to the lower end of the center conductor (6).

10. An SMB connector according to any one of claims 1-4, characterized in that: The lower end of the outer conductor (3) is formed with a horizontally extending wiring portion (35), which is perpendicular to the center conductor (6), making the SMB connector a bent structure; and a second wire hole (353) is provided on one side of the wiring portion (35) for the wire to pass through.

Images