CN109787183B - A radio frequency coaxial connector - Google Patents

Abstract

The invention discloses a radio frequency coaxial connector which comprises a positioning barrel, wherein a plurality of mounting grooves which are uniformly distributed along the circumferential direction are formed in the inner circumferential wall of the positioning barrel, a telescopic device is fixedly arranged in the middle of each mounting groove, and two first plate springs which are symmetrically arranged are arranged on each telescopic device; the two first plate springs are hinged through a hinge shaft fixedly arranged on the telescopic device, and the end parts, far away from the hinge shaft, of the two first plate springs are arranged in the mounting grooves in a sliding mode; still be provided with in the mounting groove and be used for the drive screw of first leaf spring deformation, drive screw has two kinds of screw threads that revolve to opposite. The invention utilizes the plate spring to form radial force and axial force to form fixation on the cable, thereby avoiding the problem of circumferential force during connection and further avoiding the problem that the cable is easy to twist in the traditional fixation mode.

Description

A radio frequency coaxial connector

technical field

The invention relates to the technical field of cable connectors, in particular to a radio frequency coaxial connector.

Background technique

The RF coaxial connector is used for the coaxial connection of two sections of RF cable, which acts as a bridge connection; there are many types of existing coaxial connectors, and most of them are connected by threads, although the methods of screw connection are relatively It is simple, but in actual operation, the threaded connection is realized by rotation, so it is easy to drive the cable to rotate synchronously during connection, which is easy to cause the cable to twist. Large twists, ultimately have an impact on the life of the cable.

SUMMARY OF THE INVENTION

In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a radio frequency coaxial connector, which uses a leaf spring to form a radial force and an axial force to form a fixation to the cable, so as to avoid the problem of generating circumferential force during connection, thereby avoiding the It solves the problem that the traditional fixing method is easy to twist the cable.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

The invention provides a radio frequency coaxial connector, comprising a positioning cylinder for inserting two sections of cables, the inner peripheral wall of the positioning cylinder is provided with a plurality of installation grooves evenly distributed along the circumferential direction, and the middle part of the installation groove is fixed A telescopic device is provided, and two symmetrically arranged first leaf springs are arranged on the telescopic device, and the two first leaf springs form an M shape; The opposite ends of the two first leaf springs are slidably arranged in the installation groove; the installation groove is also provided with a drive screw for driving the two first leaf springs to deform synchronously.

Preferably, the first leaf spring is arc-shaped, and the two first leaf springs are hinged to each other through a hinge shaft fixed on the telescopic device; the first leaf spring is close to the end of the telescopic device to the The vertical distance from the bottom of the installation groove is greater than the vertical distance from the end of the installation groove away from the telescopic device to the bottom of the installation groove.

Preferably, the telescopic device includes a fixed column fixedly arranged in the middle of the installation groove, the fixed column extends out of the installation groove; a telescopic column is movably provided in the fixed column through a spring, and the The hinge shaft is fixed with the end of the telescopic column away from the fixed column, and the stiffness of the spring is greater than that of the first leaf spring.

Preferably, the fixing column is provided with a rotating hole for the driving screw to rotate, the part where the driving screw is in contact with the rotating hole is an optical axis, and the driving screw is located on the parts on both sides of the rotating hole There are external threads with opposite directions of rotation; two push blocks are symmetrically arranged on the drive screw to be threadedly connected with them, the push blocks are slidably arranged in the installation groove, and the push blocks are used to push the two A leaf spring generates synchronous deformation; one end of the driving screw is fixedly provided with a driven gear, one end of the positioning cylinder is provided with a rotatable adjusting sleeve, and the inner ring of the adjusting sleeve is provided with the driven gear meshing internal teeth.

Preferably, the drive screw is symmetrically provided with two limiting rings about the fixing column, and the two limiting rings are respectively abutted on both sides of the fixing column.

Preferably, a plurality of movable second leaf springs are also arranged in the installation groove, and the stiffness of the second leaf springs is smaller than that of the first leaf springs; the number of the second leaf springs is an even number, and these The second leaf springs are symmetrically distributed on both sides of the two first leaf springs, and the push blocks are used to abut against the second leaf springs close to both ends of the positioning cylinder.

Preferably, the second leaf spring is elliptical, and when the first leaf spring and the second leaf spring are in a natural state, the span of the first leaf spring along the axial direction of the positioning cylinder is less than The span of the second leaf spring along the axial direction of the positioning cylinder, the maximum vertical distance from the first leaf spring to the bottom of the installation groove is greater than the distance from the second leaf spring to the bottom of the installation groove. Maximum vertical distance.

Preferably, two first sliding columns are symmetrically arranged at one end of the first leaf spring away from the hinge shaft, and two second sliding columns are symmetrically arranged at both ends of the second leaf spring. A sliding column has the same size and structure as the second sliding column, and a guide groove for the first sliding column and the second sliding column to slide is opened in the installation groove.

Preferably, a plurality of evenly distributed anti-skid protrusions are provided on the surface of the first leaf spring close to the axis of the positioning cylinder and on the surface of the second leaf spring close to the axis of the positioning cylinder.

Preferably, the anti-skid protrusions are hemispherical, and the material of the anti-skid protrusions is rubber.

The beneficial effects of the present invention are:

(1) The present invention utilizes the circumferentially arranged installation grooves, so that the first leaf springs are distributed in the circumferential direction, thereby forming multi-directional positioning in the positioning cylinder, so that the cable can be well limited in the radial direction, ensuring the safety of the cable. stability.

(2) The present invention does not generate circumferential force when coaxially fixing the two sections of the cable, thereby avoiding the problem of the cable being rotated and twisted when the cable is fixed.

(3) The present invention utilizes the M-shaped structure of the two first leaf springs, so that the two first leaf springs can generate an axial force while being squeezed, thereby realizing the radial fixation of the two sections of the cable and generating an axial force at the same time. The pushing force makes the two sections of cable press together tightly, limiting the axial displacement of the two sections of cable.

(4) The present invention utilizes a driving screw with two kinds of rotational threads, so that the two first leaf springs can be deformed synchronously, which ensures the uniformity of the deformation of the two first leaf springs, thereby ensuring the uniformity of the force on the two sections of the cable .

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic structural diagram 1 of a radio frequency coaxial connector according to an embodiment of the present invention (two sections of cables are not drawn);

FIG. 2 is a second schematic structural diagram of a radio frequency coaxial connector according to an embodiment of the present invention;

Fig. 3 is the enlarged view of A part in Fig. 1;

Fig. 4 is the enlarged view of B part in Fig. 1;

Fig. 5 is the enlarged view of C part in Fig. 2;

Fig. 6 is the connection schematic diagram of two first leaf springs;

Fig. 7 is the structural representation of the second leaf spring;

Figure 8 is a schematic diagram of the connection between the adjusting sleeve and the driven gear.

Description of reference numerals: 1-positioning cylinder, 11-installation groove, 111-guide groove, 2-first leaf spring, 21-first sliding column, 22-hinge shaft, 3-second leaf spring, 31-second Sliding column, 4-adjustment sleeve, 41-internal tooth, 5-drive screw, 51-limit ring, 52-driven gear, 53-push block, 6-fixed column, 61-telescopic column, 62-spring, 7 -cable.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example:

As shown in FIG. 1 and FIG. 2, the present invention improves a radio frequency coaxial connector for connecting two sections of cables 7 that need to be coaxial, mainly including a positioning cylinder 1, a telescopic device, a driving screw 5 and two first Leaf spring 2; In this embodiment, four installation grooves 11 evenly distributed along the circumferential direction are opened on the inner peripheral wall of the positioning cylinder 1, and a telescopic device is fixed in the middle of the installation groove 11, and the two first leaf springs 2 pass through The hinge shafts 22 are hinged and symmetrically arranged on both sides of the telescopic device. The hinge shafts 22 are fixed on the telescopic device and can move along with the telescopic device, while the ends of the two first leaf springs 2 away from the hinge shafts 22 are slidably arranged on the installation. Only linear displacement can be performed in the groove 11; with reference to Figure 1, the first leaf spring 2 is in an arc shape, and the vertical distance from the end of the first leaf spring 2 close to the telescopic device to the bottom of the installation groove 11 is greater than the end of the first leaf spring 2 away from the telescopic device. The vertical distance to the bottom of the mounting groove 11 forms an M shape.

As shown in FIG. 3 , the telescopic device includes a fixed column 6 fixed in the middle of the installation slot 11 , and the fixed column 6 extends out of the installation slot 11 ; a telescopic column 61 is movably provided in the fixed column 6 through a spring 62 , wherein the spring One end of the telescopic column 62 is fixed in the fixed column 6, and the other end is fixed on the telescopic column 61. In addition, in order to prevent the telescopic column 61 from being separated from the fixed column 6, the structure of the telescopic column 61 can be arranged in a stepped shaft shape to form a step, thereby preventing the telescopic column 61 The hinge shaft 22 is fixed on the telescopic column 61, and then moves with the movement of the telescopic column 61. The stiffness of the spring 62 is greater than that of the first leaf spring 2, that is, when the first leaf spring 2 presses the cable 7, the first A leaf spring 2 is deformed first, and when the deformation reaches a certain level, the spring 62 is compressed under the action of the first leaf spring 2 .

Further, the fixed column 6 is provided with a rotating hole for the rotation of the driving screw 5, and the portion of the driving screw 5 located on both sides of the rotating hole has external threads with opposite directions of rotation, and the part where the driving screw contacts the rotating hole is the optical axis (that is, the optical axis). The outer wall of this part is smooth and has no thread), that is, on the basis of FIG. 3 , the thread rotation direction of the driving screw 5 on the bottom of the rotating hole is opposite to the thread rotation direction above the rotating hole, and on the driving screw 5 Two push blocks 53 fitted with its threads are symmetrically arranged (that is, the distances from the two push blocks 53 to the fixed column 6 are the same), and the push blocks 53 are slidably arranged in the installation groove 11 and rely on the installation groove 11 to limit their own rotation so that the push blocks 53 can only perform linear motion, so that when the driving screw 5 rotates, it can make the two push blocks 53 move in opposite directions or toward each other, so as to synchronously push the two first leaf springs 2 to deform; the rotation of the driving screw 5 depends on the gears The transmission is realized, referring to Fig. 8, that is, a driven gear 52 is arranged at one end of the driving screw 5, a rotatable adjusting sleeve 4 is arranged at one end of the positioning cylinder 1, and the inner ring of the adjusting sleeve 4 is arranged to mesh with the driven gear 52. When the adjusting sleeve 4 rotates, it will drive the four driven gears 52 to rotate synchronously, and then drive the first leaf spring 2 to deform synchronously under the action of the driving screw 5 .

Further, with reference to FIG. 3, since the driving screw 5 has external threads with two rotation directions, in order to ensure its stable rotation, two limit rings 51 can be set on it, and the two limit rings 51 are closely attached to the fixed position. The two sides of the column 6 further limit the axial freedom of the drive screw 5 .

As shown in FIG. 1 , in order to further improve the stability of the cable 7 after connection, several movable second leaf springs 3 are also arranged in the installation groove 11 . The number of the second leaf springs 3 is even, and these second leaf springs 3 are evenly distributed on both sides of the two first leaf springs 2, that is, the number of second leaf springs 3 on both sides of the telescopic device is the same. Leaf spring 3, the push block 53 is used to press against the second leaf spring 3 near the two ends of the positioning cylinder 1 (ie, the second leaf spring 3 at the most ends), so that the two adjacent second leaf springs 3, The second leaf spring 3 is tightly pressed against the first leaf spring 2; in addition, the stiffness of the second leaf spring 3 is smaller than that of the first leaf spring 2, that is, during the relative movement of the push block 53, the push block 53 is pressed against the first leaf spring 2. After the second leaf spring 3 is mounted, the second leaf spring 3 deforms first, and then drives the first leaf spring 2 to deform.

Further, in order to ensure that the sliding of the first leaf spring 2 and the second leaf spring 3 in the installation groove 11 is along a straight line, with reference to FIGS. 6 and 7 , one end of the first leaf spring 2 away from the hinge shaft 22 is symmetrically provided with Two first sliding columns 21 and two second sliding columns 31 are symmetrically arranged at both ends of the second leaf spring 3 . The size and structure of the first sliding column 21 and the second sliding column 31 are the same. A guide groove 111 is provided for the first sliding column 21 and the second sliding column 31 to slide; in order to improve the friction force between the leaf spring and the cable 7, on the surface of the first leaf spring 2 close to the axis of the positioning cylinder 1, the second plate The surface of the spring 3 close to the axis of the positioning cylinder 1 is provided with several evenly distributed anti-skid protrusions, wherein the anti-skid protrusions can be made of hemispherical rubber.

1 and 7, the second leaf spring 3 is elliptical. It should be noted that the second leaf spring 3 is not a complete ellipse, but only a part of the ellipse. In addition, the main positioning of the cable 7 depends on the first For the leaf spring 2, when the push block 53 performs relative movement, the first leaf spring 2 is required to preferentially act on the cable 7; as shown in FIG. 1, when the first leaf spring 2 and the second leaf spring 3 are in a natural state ( That is, when the two are not subject to external force), the span of the first leaf spring 2 along the axial direction of the positioning cylinder ₁ (the half of K1 in FIG. 6 is the span) is smaller than that of the second leaf spring 3 along the axial direction of the positioning cylinder 1 The span (K ₂ is the span in Figure 7), the maximum vertical distance from the first leaf spring 2 to the bottom of the mounting groove 11 is greater than the maximum vertical distance from the second leaf spring 3 to the bottom of the mounting groove 11. Combined with the second leaf spring The stiffness of 3 is smaller than that of the first leaf spring 2. This setting makes the second leaf spring 3 deform first when the push block 53 starts to move, and then the first leaf spring 2 deforms again. The vertical distance at the bottom of the groove is small, so the first leaf spring 2 will preferentially press against the cable 7 (therefore, it is required to be set according to different types of cables 7 in the design, so that the first leaf spring 2 has not produced a large size. The deformation of the cable 7 has not yet pressed against the cable 7), first position the cable 7, and then with the further movement of the push block 53, the vertical distance between the second leaf spring 3 and the bottom of the installation groove 11 gradually increases (as shown in Figure 2 shown) until it is pressed against the cable 7 (the second leaf spring 3 with a large span ensures that it can be pressed against the cable 7), and further positioning is completed;

Further, with reference to FIG. 5, for the convenience of description, it is stipulated that the first leaf spring 2 in FIG. 5 is pressed against the cable 7 at this time, and the second leaf spring 3 is just pressed against the cable 7, because the present invention is aimed at two sections. For cable 7, the contact points of one section of cable 7 and the first leaf spring 2 and the second leaf spring 3 are named as point c and point a respectively, and the other section of cable 7 and the contact points between the first leaf spring 2 and the second leaf spring 3 are named as point c and point a respectively. The contact points are named c' and a' respectively, and correspondingly the contact positions of the first leaf spring 2 and the second leaf spring 3 are named b point and b'; the contact positions of the two first leaf springs 2 are named as point d;

First, when both the first leaf spring 2 and the second leaf spring 3 are in a natural state, the push block 53 is pushed, and the second leaf spring 3 is deformed. Under the action of the second leaf spring 3, the leaf spring 2 generates pushing forces F ₄ and F ₄ ' to the first leaf spring 2 at points b and b', thereby causing the first leaf spring 2 to deform and gradually press against the cable. 7, at this time, the first leaf spring 2 is bound to generate radial forces F ₁ and F ₁ ' at c and c', and then the two sections of cable 7 are pressed against each other in the radial direction. At the same time, under the action of the second leaf spring 3 Then, since the two first leaf springs 2 are hinged, a thrust force F ₃ will be generated at point d, which in turn causes a displacement trend in the direction of F ₃ at point d, so that the first leaf spring 2 is located at point c and point c' respectively. The thrust forces F ₂ and F ₂ ' are generated (which are defined as axial forces in this embodiment), and the magnitudes of F ₂ and F ₂ ' are the same and opposite to each other, so that the two sections of the cable 7 tend to move relative to each other, so that the two sections of the cable are 7 are tightly pressed together in the axial direction to ensure the axial positioning of the two sections of cable 7;

Secondly, with the continuous pushing of the second leaf spring 3, the second leaf spring 3 is gradually deformed, and at the same time, with the continuous increase of the force, the point d will overcome the elastic force of the spring 62 and move, thereby further causing the first leaf spring 2 to generate a pushing force , when the second leaf spring 3 is just pressed against the cable 7 (ie, the state in FIG. 5 ), radial forces F ₅ and F ₅ ' will be generated at points a and a' respectively, thereby further generating multiple radial forces Position the two sections of cable 7; secondly, when the push block 53 is pushed further, the second leaf spring 3 will press against the cable 7, which will generate F ₆ and F at points a and a' respectively. ₆ ' (which is defined as axial force in this embodiment), F ₆ , F ₆ ' have the same magnitude and opposite directions, and further generate a driving force on the two sections of cable 7 on the basis of F ₂ and F ₂ ', The two sections of cable 7 are pressed together tightly, and during this process, the first leaf spring 2 continues to generate radial force and axial force on the two sections of cable 7 to maintain the positioning of the cable 7;

Finally, the two sections of cable 7 use the radial force generated by the first leaf spring 2 and the second leaf spring 3 to form radial positioning, and use the axial force generated by the first leaf spring 2 and the second leaf spring 3 to generate axial positioning, and finally The two sections of cable 7 are coaxially positioned under the action of the first leaf spring 2 and the second leaf spring 3, so as to avoid the circumferential rotation caused by the traditional screw connection.

During use, according to the outer diameter of the cable 7, reasonably set the maximum vertical distance from the first leaf spring 2 and the second leaf spring 3 to the installation groove 11, so that when the cable 7 is inserted, the cable 7 just sticks to the first leaf spring 2 or There is a small hole, so that the first leaf spring 2 can be pressed against the cable 7 without a large deformation; when inserting the two sections of the cable 7, you need to pay attention to the joint of the two sections of the cable 7 and the hinge shaft 22. Flush (as shown in Figure 2, in addition, for the convenience of installation, the positioning cylinder 1 can be made transparent for easy observation); after the two sections of cable 7 are inserted, the push block 53 can be driven to move by rotating the adjustment sleeve 4, so that the push block 53 is pressed against the second leaf spring 3, thereby causing the first leaf spring 2 to deform and press against the two sections of cable 7, and then continue to rotate the adjusting sleeve 4, so that the second leaf spring 3 is further deformed until the second leaf spring 3 is pressed against the cable 7 (as shown in FIG. 5 ), so that the cable 7 is finally connected coaxially under the action of the first leaf spring 2 and the second leaf spring 3 .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

1. A radio frequency coaxial connector, characterized in that it comprises a positioning cylinder (1) for inserting two sections of cables (7), and the inner peripheral wall of the positioning cylinder (1) is provided with several uniform circumferential Distributed installation grooves (11), a telescopic device is fixedly arranged in the middle of the installation groove (11), and two symmetrically arranged first leaf springs (2) are arranged on the telescopic device, and the two first leaf springs ( 2) M-shape is formed; the adjacent ends of the two first leaf springs (2) are rotatably arranged on the telescopic device, and the opposite ends of the two first leaf springs (2) are slidably arranged on the installation Inside the slot (11); the installation slot (11) is also provided with a drive screw (5) for driving the synchronous deformation of the two first leaf springs (2). 2 . The radio frequency coaxial connector according to claim 1 , wherein the first leaf springs ( 2 ) are arc-shaped, and the two first leaf springs ( 2 ) are fixed on the telescopic The hinge shaft (22) on the device is hinged; the vertical distance from the end of the first leaf spring (2) close to the telescopic device to the bottom of the installation groove (11) is greater than the end of the first leaf spring (2) far away from the telescopic device The vertical distance from the part to the bottom of the installation groove (11). 3. The radio frequency coaxial connector according to claim 2, wherein the telescopic device comprises a fixing column (6) fixedly arranged in the middle of the installation groove (11), the fixing column (6) ) extends out of the installation slot (11); a telescopic column (61) is movably provided in the fixed column (6) through a spring (62), and the hinge shaft (22) is connected to the telescopic column ( 61) The ends away from the fixing column (6) are fixed to each other, and the stiffness of the spring (62) is greater than the stiffness of the first leaf spring (2). 4. A radio frequency coaxial connector according to claim 3, characterized in that, the fixing column (6) is provided with a rotating hole for the rotation of the driving screw (5), and the driving screw (5) ) The part in contact with the rotating hole is the optical axis, and the parts of the driving screw (5) located on both sides of the rotating hole have external threads with opposite directions of rotation; the driving screw (5) is symmetrically provided with two A push block (53) is threadedly connected to the push block (53), the push block (53) is slidably arranged in the installation groove (11), and the push block (53) is used to push the two first leaf springs (2). ) produces synchronous deformation; one end of the drive screw (5) is fixedly provided with a driven gear (52), one end of the positioning cylinder (1) is provided with a rotatable adjusting sleeve (4), the adjusting sleeve (4) ) is provided with internal teeth (41) meshing with the driven gear (52). 5. The radio frequency coaxial connector according to claim 4, characterized in that, the drive screw (5) is symmetrically provided with two limit rings (51) about the fixing column (6), and the two The limiting rings (51) are respectively abutted on both sides of the fixing column (6). 6. A radio frequency coaxial connector according to any one of claims 4 or 5, wherein a plurality of movable second leaf springs (3) are also arranged in the installation groove (11), so that The stiffness of the second leaf spring (3) is smaller than the stiffness of the first leaf spring (2); the number of the second leaf springs (3) is an even number, and these second leaf springs (3) are symmetrically distributed in On both sides of the two first leaf springs (1), the push blocks (53) are used to abut against the second leaf springs (3) close to both ends of the positioning cylinder (1). 7 . The radio frequency coaxial connector according to claim 6 , wherein the second plate spring ( 3 ) is elliptical, and when the first plate spring ( 2 ) and the second plate When the spring (3) is in a natural state, the span of the first leaf spring (2) along the positioning cylinder (1) in the axial direction is smaller than that of the second leaf spring (3) along the positioning cylinder (1) ) the span in the axial direction, the maximum vertical distance from the first leaf spring (2) to the bottom of the mounting groove (11) is greater than that from the second leaf spring (3) to the bottom of the mounting groove (11) the maximum vertical distance. 8 . The radio frequency coaxial connector according to claim 7 , wherein two first sliding columns are symmetrically arranged at one end of the first leaf spring ( 2 ) away from the hinge shaft ( 22 ). 9 . (21), two second sliding columns (31) are symmetrically arranged at both ends of the second leaf spring (3), the first sliding column (21) and the second sliding column (31) are The structure is the same, and the installation groove (11) is provided with a guide groove (111) for the first sliding column (21) and the second sliding column (31) to slide. 9. The radio frequency coaxial connector according to claim 8, characterized in that, on the surface of the first leaf spring (2) close to the axis of the positioning cylinder (1), the second leaf spring ( 3) Several evenly distributed anti-skid protrusions are arranged on the surface close to the axis of the positioning cylinder (1). 10 . The RF coaxial connector according to claim 9 , wherein the anti-skid protrusions are hemispherical, and the material of the anti-skid protrusions is rubber. 11 .

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