CN221651819U - A crown spring contact structure and a crown spring using the same - Google Patents

Abstract

The utility model discloses a crown spring contact structure and a crown spring using the same, comprising at least one connecting rib and two reeds of cantilever structures, wherein the upper end and the lower end of the connecting rib are respectively used for connecting an annular first end belt and an annular second end belt, and the reeds comprise a first reed and a second reed which are respectively connected with the first end belt and the second end belt; the first free end of the first reed extends toward the second end strap, and the second free end of the second reed extends toward the first end strap; the first reed and the second reed are distributed in a staggered way along the axis direction; the middle part, the first free end and the second free end of the connecting rib are respectively provided with a first contact pin contact part, a second contact pin contact part and a third contact pin contact part which are concave inwards along the axis direction; the heights of the upper end and the lower end of the first reed and the second reed are larger than the height of the middle part of the connecting rib; the third contact pin contact part and the second contact pin contact part are respectively arranged on the upper side and the lower side of the first contact pin contact part along the axial direction. The utility model has the advantages of long service life, more reed contact points, strong current carrying capacity and soft plugging.

Description

A crown spring contact structure and a crown spring using the same

Technical Field

The utility model belongs to the field of electric connectors, and in particular relates to a crown spring contact structure and a crown spring using the contact structure.

Background Art

The crown spring of an electrical connector is used to realize a conductive contact terminal connected to a pin in the electrical connector, and is widely used in electronic and electrical equipment.

The crown spring in the prior art is generally cage-shaped, that is, a structure with large ends and a small middle; a crown spring contact structure is arranged in the middle of the end bands at both ends, and the crown spring contact structure is generally a rectangular spring leaf, and the middle part of the spring leaf protrudes toward the axis of the cylinder to form the crown spring contact structure; the protruding part of the spring leaf is the spring leaf contact point, which is used to contact the pin to play the role of conducting the circuit.

The existing reed contact points are generally concentrated in the middle of the cylinder, so there are fewer contact points and the insertion and extraction force is larger, which cannot meet the increasingly higher requirements for contact resistance and insertion and extraction force in high current transmission. At the same time, the smallest part of the existing reed in the middle is easy to yield during multiple insertion and extraction processes, resulting in unstable insertion and extraction force and unable to obtain a longer life due to its structural limitations.

Utility Model Content

The utility model aims to provide a crown spring contact structure with long service life, multiple spring contact points, strong current carrying capacity and soft plugging and unplugging, and a crown spring using the contact structure in view of the deficiencies in the prior art.

The technical purpose of the utility model is achieved through the following technical solutions:

A crown spring contact structure comprises at least one connecting rib and two spring leaves of cantilever structure, wherein the upper and lower ends of the connecting rib are respectively used to connect a first end band and a second end band of an annular shape, and the spring leaves comprise a first spring leaf and a second spring leaf respectively connected to the first end band and the second end band; the first free end of the first spring leaf extends toward the second end band, and the second free end of the second spring leaf extends toward the first end band; the first spring leaf and the second spring leaf are staggered along the axial direction; the middle part, the first free end and the second free end of the connecting rib are respectively provided with a first pin contact portion, a second pin contact portion and a third pin contact portion concave toward the axial direction; the heights of the upper and lower ends of the first spring leaf and the second spring leaf are greater than the height of the middle part of the connecting rib; the third pin contact portion and the second pin contact portion are respectively arranged on the upper and lower sides of the first pin contact portion along the axial direction.

Preferably, the ends of the first free end and the second free end are respectively provided with a first socket body mating section and a second socket body mating section that cooperate with the inner wall of the socket body; the second socket body mating section, the third pin contact portion, the first pin contact portion, the second pin contact portion and the first socket body mating section are arranged in sequence from top to bottom; when the pin is inserted from the upper side of the first end band, the outer wall of the front section of the pin contacts the third pin contact portion, and the outer side of the second socket body mating section abuts against the inner wall of the socket body; when the pin moves further downward, the outer wall of the front section of the pin contacts the first pin contact portion, and the outer wall of the middle section of the pin contacts the third pin contact portion; when the pin moves to the upper side of the second end band, the outer wall of the front section of the pin contacts the second pin contact portion, the outer wall of the middle section of the pin contacts the first pin contact portion, the outer wall of the rear section of the pin contacts the third pin contact portion, and the outer side of the first socket body mating section abuts against the inner wall of the socket body.

Preferably, the connecting rib is one or more, and the connecting rib is arranged between the two reeds, or on one side of one of the two reeds, or on both sides of the two reeds, or between the two reeds and on one side of one of them, or between the two reeds and on both sides.

Preferably, when the connecting rib is adjacent to another connecting rib, the spacing distance between the two is smaller than the width of the spring leaf.

Preferably, the spring sheet is in the shape of an elongated strip, and the connecting ribs on both sides of the spring sheet are arranged relatively parallel.

Preferably, the reed is conical or triangular, and the connecting ribs on both sides of the reed are arranged relatively inclined.

A crown spring comprises at least two coaxially oppositely arranged annular end bands; the crown spring contact structures described above are uniformly distributed on opposite sides of the end bands.

Furthermore, the end band includes a first end band and a second end band which are arranged one above the other; a plurality of grooves are evenly distributed around the circumference on the upper end surface of the first end band and/or the lower end surface of the second end band.

Furthermore, when there are three end bands, the end bands include a first end band, a third end band and a second end band which are arranged at intervals from top to bottom, and the lower end of the first end band and the upper end of the third end band, as well as the lower end of the third end band and the upper end of the second end band are relatively arranged; the crown spring contact structure is evenly distributed between the lower end of the first end band and the upper end of the third end band, as well as the lower end of the third end band and the upper end of the second end band.

Furthermore, the end band is an open annular structure, and two protrusions staggered in upper and lower positions are provided at the opening of the end band; the protrusions are gap-fitted with the end face of the end band opening on one side thereof.

Furthermore, the protrusion is rectangular or triangular.

Furthermore, there are at least two connecting ribs near the opening of the end band.

Compared with the prior art, the beneficial effects of the utility model are:

1. The crown spring contact structure of the utility model includes at least one connecting rib and two cantilever springs, and the springs include a first spring and a second spring connected to a first end band and a second end band respectively. The middle part of the connecting rib, the first free end and the second free end are respectively provided with a first pin contact portion, a second pin contact portion and a third pin contact portion which are concave toward the axis along the axial direction; the heights of the upper and lower ends of the first spring and the second spring are greater than the height of the middle part of the connecting rib; the third pin contact portion and the second pin contact portion are respectively arranged on the upper and lower sides of the first pin contact portion along the axial direction. The setting of the connecting rib can make the structure of the crown spring more solid and less prone to deformation; the plug-in contact portions arranged on the first end band, the second end band and the connecting rib form three layers of contact points, thus avoiding the problem that the contact points of the springs are concentrated in the middle part of the cylinder; at the same time, the crown spring contact structure with three layers of contact points avoids the problem that the smallest part in the middle part of the existing spring is easily surrendered during multiple plug-in and pull-out processes, thereby resulting in unstable plug-in and pull-out force and the problem that a longer life cannot be obtained due to its structural limitations. The adoption of this technical measure has the advantages of long service life, multiple reed contact points, gentle plugging and unplugging, and strong current carrying capacity, and can meet the increasingly high requirements for contact resistance and plugging and unplugging force in large current transmission.

2. The reed of the utility model is conical or triangular, and the technical measures are adopted to make the reed have enough width to ensure the current carrying capacity. The connecting ribs are arranged obliquely to form an oblique structure, which has the advantage of soft plugging and unplugging.

3. The end band of the utility model includes a first end band and a second end band arranged up and down; a plurality of grooves are evenly distributed around the upper end surface of the first end band and/or the lower end surface of the second end band. By adopting this technical measure, the contact area between the end surface of the end band with the grooves and the step of the socket body can be reduced, thereby increasing the contact area between the outer surface of the end band and the inner wall of the socket body.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic structural diagram of a crown spring of the utility model;

Fig. 2 is a schematic diagram of the inner side of Fig. 1;

FIG3 is a schematic structural diagram of the other side of FIG1 ;

FIG4 is a schematic diagram of the crown spring of FIG1 assembled in the socket body;

FIG5 is another schematic structural diagram of the crown spring of the utility model;

Reference numerals: 1—first end band;

2—second end band; 21—groove;

3—connecting rib; 31—first pin contact portion;

4—first spring leaf; 41—first free end; 411—first socket body matching section; 42—second pin contact portion;

5—second spring leaf; 51—second free end; 511—second socket body matching section; 52—third pin contact portion;

6—insertion pin; 61—outer wall of the insertion pin;

7—jack body; 71—inner wall of jack body; 72—jack body step;

8—third end band; 9—opening; 91—protrusion.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

Example 1

As shown in Figures 1 to 4, a crown spring contact structure includes at least one connecting rib 3 and two springs of cantilever structure, the upper and lower ends of the connecting rib 3 are respectively used to connect the annular first end band 1 and the second end band 2, the spring includes a first spring 4 and a second spring 5 connected to the first end band 1 and the second end band 2 respectively; the first free end 41 of the first spring 4 extends toward the second end band 2, and the second free end 51 of the second spring 5 extends toward the first end band 1; the first spring 4 and the second spring 5 are staggered along the axial direction; the middle part of the connecting rib 3, the first free end 41 and the second free end 51 are respectively provided with a first pin contact portion 31, a second pin contact portion 42 and a third pin contact portion 52 concave toward the axis along the axial direction; the heights of the upper and lower ends of the first spring 4 and the second spring 5 are greater than the height of the middle part of the connecting rib 3; the third pin contact portion 52 and the second pin contact portion 42 are respectively arranged on the upper and lower sides of the first pin contact portion 31 along the axial direction.

The connection rib 3 can make the crown spring structure more solid and not easy to deform; the plug-in contact parts set on the first end band 1, the second end band 2 and the connection rib 3 form three layers of contact points, which avoids the problem of the spring contact points being concentrated in the middle of the cylinder; at the same time, the crown spring contact structure with three layers of contact points avoids the problem that the smallest part of the middle of the existing spring is easy to surrender during multiple plug-in and pull-out processes, thereby resulting in unstable plug-in and pull-out force and the inability to obtain a longer life due to its structural limitations. The adoption of this technical measure has the advantages of long service life, multiple spring contact points, gentle plug-in and pull-out, and strong current carrying capacity, and can meet the increasingly high requirements for contact resistance and plug-in and pull-out force in large current transmission.

As shown in FIGS. 1 to 4 , the crown spring generally consists of two coaxially oppositely disposed annular end bands and a crown spring contact structure disposed between the end bands.

The crown spring contact structure includes at least one connecting rib 3 and two cantilever spring leaves. In this embodiment, there is one connecting rib 3, and its upper and lower ends are connected to the annular first end band 1 and the second end band 2. By providing the connecting rib 3, the crown spring structure is more solid and not easy to deform.

In this embodiment, the spring includes a first spring 4 and a second spring 5 connected to the first end band 1 and the second end band 2, respectively. In actual use, the first fixed end of the first spring 4 is connected to the lower end of the first end band 1, and the first free end 41 of the first spring 4 extends toward the second end band 2; the first free end 41 extends to the upper side of the second end band 2. The second fixed end of the second spring 5 is connected to the upper end of the second end band 2, and the second free end 51 of the second spring 5 extends toward the first end band 1, and the second free end 51 extends to the lower side of the first end band 1. In this embodiment, the first spring 4 and the second spring 5 have the same shape and the same length; the first spring 4 and the second spring 5 are relatively staggered in the upper and lower directions, that is, the first spring 4 and the second spring 5 are staggered in the axial direction. The middle part of the connecting rib 3, the first free end 41 and the second free end 51 are respectively provided with a first pin contact portion 31, a second pin contact portion 42 and a third pin contact portion 52 which are concave toward the axis along the axial direction; the heights of the upper and lower ends of the first spring leaf 4 and the second spring leaf 5 are greater than the height of the middle part of the connecting rib 3; the third pin contact portion 52 and the second pin contact portion 42 are respectively arranged on the upper and lower sides of the first pin contact portion 31. The crown spring contact structure is divided into upper, middle and lower multi-layer contact modes. When the pin 6 is inserted into the crown spring, the first pin contact portion 31, the second pin contact portion 42 and the third pin contact portion 52 contact with the pin outer wall 61 of the pin 6, so that the force of the pin 6 can be dispersed when plugging and unplugging, that is, the plugging and unplugging is gentle and the service life is long. The adoption of this technical measure has the advantages of more spring contact points, strong current carrying capacity and gentle plugging and unplugging.

As shown in Fig. 1 to Fig. 4, the ends of the first free end 41 and the second free end 51 are respectively provided with a first jack body matching section 411 and a second jack body matching section 511 matching with the inner wall 71 of the jack body; the second jack body matching section 511, the third pin contact portion 52, the first pin contact portion 31, the second pin contact portion 42 and the first jack body matching section 411 are arranged in sequence from top to bottom. In actual use, after the crown spring is installed into the jack body 7, the first end band 1 is at the open end of the jack body 7, and the end surface of the second end band 2 abuts against the jack body step 72 of the jack body 7.

When the pin 6 is inserted from the upper side of the first end band 1, the outer wall of the front section of the pin 6 contacts the third pin contact portion 52, and the outer side of the second socket body matching section 511 abuts against the inner wall 71 of the socket body; when the pin 6 moves further downward, the outer wall of the front section of the pin 6 contacts the first pin contact portion 31, and the outer wall of the middle section of the pin 6 contacts the third pin contact portion 52; when the pin 6 moves to the upper side of the second end band 2, the outer wall of the front section of the pin 6 contacts the second pin contact portion 42, the outer wall of the middle section of the pin 6 contacts the first pin contact portion 31, the outer wall of the rear section of the pin 6 contacts the third pin contact portion 52, and the outer side of the first socket body matching section 411 abuts against the inner wall 71 of the socket body.

By providing the first socket body mating section 411 and the second socket body mating section 511, and using them in conjunction with the first pin contact portion 31, the second pin contact portion 42 and the second pin contact portion 42, the number of spring contact points is further increased to form multi-contact point contact, thereby achieving the effect of low contact resistance and high current carrying capacity.

The connecting rib 3 is one or more, and the connecting rib 3 is arranged between the two reeds, or arranged on one side of one of the two reeds, or arranged on both sides of the two reeds, or arranged between the two reeds and on one side of one of them, or arranged between the two reeds and on both sides. In this embodiment, the connecting rib 3 is one, which is arranged between the first reed 4 and the second reed 5. In actual use, the number and position of the connecting ribs 3 are adjusted according to actual needs. When the connecting rib 3 is adjacent to another connecting rib 3, the spacing distance between the two is less than the width of the reed.

The reed is generally in the shape of a long strip. In actual use, when the reed is in the shape of a long strip, the connecting ribs 3 on both sides of the reed are arranged in parallel. When the reed is conical or triangular, the connecting ribs 3 on both sides of the reed are arranged relatively tilted. In this embodiment, the first reed 4 and the second reed 5 are conical, the connecting ribs 3 on both sides of the first reed 4 are arranged relatively tilted, and the connecting ribs 3 on both sides of the second reed 5 are arranged relatively tilted. The reed is conical or triangular, so that the reed has enough width to ensure the current carrying capacity. The connecting ribs 3 are arranged tilted to form an oblique structure, which has the advantage of soft plugging and unplugging.

Example 2

As shown in Figures 1 to 4, the other contents of this embodiment are the same as those of Example 1, except that: this embodiment provides a crown spring, including two annular end bands coaxially arranged opposite to each other; the crown spring contact structure in Example 1 is evenly distributed on the opposite sides of the end bands. In this embodiment, the two annular end bands coaxially arranged opposite to each other are the first end band 1 and the second end band 2, and the crown spring contact structure in Example 1 is evenly distributed on the opposite sides of the first end band 1 and the second end band 2. In actual use, multiple groups of crown spring contact structures are evenly distributed on the opposite sides of the first end band 1 and the second end band 2, and the number of groups of crown spring contact structures is adjusted according to the overall structure of the crown spring. The crown spring using the crown spring contact structure in Example 1 has the advantages of long service life, multiple contact points of the spring leaf, strong current carrying capacity, and soft plugging and unplugging.

As shown in Fig. 1 to Fig. 4, the end band includes a first end band 1 and a second end band 2 arranged up and down; a plurality of grooves 21 are evenly distributed on the upper end surface of the first end band 1 and/or the lower end surface of the second end band 2. In actual use, there are cases where the grooves 21 are arranged only on the end surface of one end band and the grooves 21 are arranged on the end surfaces of both end bands at the same time. If the upper end surface of the first end band 1 and the lower end surface of the second end band 2 are evenly distributed on the upper end surface, the crown spring is inserted into the socket body 7 at any one end. If the grooves 21 are only arranged on the end surface of one end band, when the crown spring is installed in the socket body 7, the end with the grooves 21 faces the socket body step 72; when the crown spring is completely installed in the socket body 7, the end surface of the end band with the grooves 21 abuts against the socket body step 72 of the socket body. In this embodiment, the crown spring includes two annular end bands arranged coaxially opposite to each other, namely, the first end band 1 and the second end band 2 arranged up and down. Among them, a plurality of grooves 21 are evenly distributed around the lower end surface of the second end band 2, and the lower end surface of the second end band 2 abuts against the socket body step 72 of the socket body 7. In actual use, when a plurality of grooves 21 are evenly distributed around the upper end surface of the first end band 1, when the crown spring is installed into the socket body 7, the first end band 1 faces the socket body step 72; when the crown spring is completely installed in the socket body 7, the end surface of the first end band 1 abuts against the socket body step 72. The groove 21 is a clearance groove arranged on the end surface of the second end band 2. By adopting this technical measure, the contact area between the end surface of the end band provided with the groove 21 and the socket body step 72 can be reduced, thereby increasing the contact area between the outer surface of the end band and the inner wall 71 of the socket body.

The end band is an open annular structure, and two protrusions 91 are arranged at the opening 9 of the end band, which are staggered up and down; the side of the protrusion 91 facing the end face of the end band opening is in clearance with the end face of the end band opening. In actual use, when the first end band 1 and the second end band 2 adopt an open annular structure, there is a problem that the crown springs are nested together during the shipping process due to the excessive gap of the opening 9 of the end band. By setting two protrusions 91 staggered up and down; the side of the protrusion 91 facing the end face of the end band opening is in clearance with the end face of the end band opening, the crown springs can be prevented from being nested together. In actual use, the protrusion 91 is a rectangular or triangular structure.

There are at least two connecting ribs 3 near the opening 9 of the end band. In actual use, there is generally one connecting rib 3 provided at the opening 9 of the first end band 1 and the second end band 2. During use, the crown spring is easily deformed due to the compression of the opening 9 of the end band. Therefore, several more connecting ribs 3 are provided near the opening 9 of the end band to improve the connection strength and prevent the crown spring from being easily deformed.

Example 3

As shown in FIG5 , the other contents of this embodiment are the same as those of the embodiment 2, except that: there are three end bands constituting the crown spring. The end bands include a first end band 1, a third end band 8, and a second end band 2 arranged alternately from top to bottom, and the lower end of the first end band 1 and the upper end of the third end band 8, as well as the lower end of the third end band 8 and the upper end of the second end band 2 are arranged oppositely; the crown spring contact structure in the embodiment 1 is uniformly arranged between the lower end of the first end band 1 and the upper end of the third end band 8, as well as the lower end of the third end band 8 and the upper end of the second end band 2.

The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims (12)

1. A crown spring contact structure is characterized by comprising at least one connecting rib and two spring leaves of cantilever structures,

The upper end and the lower end of the connecting rib are respectively used for connecting an annular first end belt and an annular second end belt,

The reed comprises a first reed and a second reed which are respectively connected with the first end belt and the second end belt; the first free end of the first reed extends toward the second end strap, and the second free end of the second reed extends toward the first end strap; the first reed and the second reed are distributed in a staggered manner along the axial direction;

The middle part, the first free end and the second free end of the connecting rib are respectively provided with a first contact pin contact part, a second contact pin contact part and a third contact pin contact part which are concave inwards along the axis direction;

The heights of the upper end and the lower end of the first reed and the second reed are larger than the height of the middle part of the connecting rib; the third contact pin contact part and the second contact pin contact part are respectively arranged on the upper side and the lower side of the first contact pin contact part along the axial direction.

2. The crown spring contact structure of claim 1, wherein the ends of the first and second free ends are provided with first and second socket body mating sections, respectively, that mate with the socket body inner wall;

The second jack body matching section, the third contact pin contact part, the first contact pin contact part, the second contact pin contact part and the first jack body matching section are sequentially arranged from top to bottom;

When the pin is inserted from the upper side of the first end belt, the outer wall of the front section of the pin contacts the third pin contact part, the outer side of the second jack body matching section is abutted with the inner wall of the jack body;

When the contact pin moves downwards further, the outer wall of the front section of the contact pin is contacted with the first contact pin contact part, and the outer wall of the middle section of the contact pin is contacted with the third contact pin contact part;

When the contact pin moves to the upper side of the second end belt, the outer wall of the front section of the contact pin contacts with the second contact pin contact part, the outer wall of the middle section of the contact pin contacts with the first contact pin contact part, the outer wall of the rear section of the contact pin contacts with the third contact pin contact part, and the outer side of the matching section of the first jack body is abutted with the inner wall of the jack body.

3. The crown spring contact structure of claim 1, wherein the connecting rib is one or more, the connecting rib is disposed between two spring leaves, or on one side of one of the two spring leaves, or on both sides of the two spring leaves, or between two spring leaves, or on one side of one of the two spring leaves, or between the two spring leaves, and on both sides.

4. A crown spring contact structure according to claim 1 or 3, wherein when said rib is adjacent to another rib, the spacing therebetween is less than the width of the leaf spring.

5. A crown spring contact structure according to claim 1 or 3, wherein the spring is elongated, and the connection ribs on both sides of the spring are arranged in parallel.

6. A crown spring contact structure according to claim 1 or 3, wherein the spring is tapered or triangular, and the connecting ribs on both sides of the spring are inclined with respect to each other.

7. The crown spring is characterized by comprising at least two annular end belts which are arranged oppositely in a coaxial manner; the crown spring contact structure of any one of claims 1 to 6 is uniformly distributed on the opposite side of the end belt.

8. The crown spring of claim 7, wherein the end straps include a first end strap and a second end strap disposed above and below each other; and a plurality of grooves are uniformly distributed on the circumference of the upper end face of the first end belt and/or the lower end face of the second end belt.

9. The crown spring of claim 7, wherein when the number of end straps is three, the end straps include a first end strap, a third end strap and a second end strap that are arranged at intervals from top to bottom, and the lower ends of the first end strap and the upper ends of the third end strap and the lower ends of the third end strap and the upper ends of the second end strap are disposed opposite to each other; the crown spring contact structures are uniformly distributed between the lower end of the first end belt, the upper end of the third end belt and the upper end of the second end belt.

10. The crown spring of claim 7, wherein the end strap is of an open annular structure, and two protrusions arranged in a staggered manner are arranged at the opening of the end strap; and one side of the bulge facing the end face with the opening is in clearance fit with the end face with the opening.

11. The crown spring of claim 10, wherein the projection is rectangular or triangular.

12. The crown spring of claim 10, wherein there are at least two connecting ribs near the opening of the end band.