Movable spring device and relay

Abstract

A movable spring device and a relay comprise a driving reed, the driving reed comprises a main reed body, the main reed body is provided with a movable contact, one side of the main reed body is provided with a main driving reed body used for being connected with a pushing card, and the pushing card applies force to the main reed body in a non-uniform mode through the main driving reed body, so that when the main reed body is driven by force, the stress of the main reed body is concentrated on one side. The movable contact is eccentrically contacted with the static contact, so that under the condition of large current, a contact molten pool point caused at the switching-on moment can be transferred, the bonding force of the final contact point position of the contact is reduced, the molten pool point is easy to break when the active reed is reset, the contact is prevented from being bonded at the contact moment, and the service life of the product is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a dynamic spring device and a relay. Background Art

[0002] With the further miniaturization and intelligence of products in the fields of home appliances and power supplies, the volume requirements of the electronic components inside them are getting smaller and smaller. As one of the control switch components, the electromagnetic relay will be small in size and high in load, which will be the future development trend. In the field of power soft start, the product is required to be small in size but can carry a large current. However, the relay is smaller in size but needs to switch a larger current. Therefore, during the connection process, the dynamic and static contacts are more likely to fail due to contact adhesion. Utility Model Content

[0003] In view of the shortcomings of the background technology, the purpose of the utility model is to provide a dynamic spring device.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A dynamic spring device comprises an active spring sheet, wherein the active spring sheet comprises a main sheet body, the main sheet body is provided with a moving contact, one side of the main sheet body is provided with a main driving sheet body for connecting to a push card, and the push card applies a non-uniform force to the main sheet body through the main driving sheet body, so that the moving contact eccentrically contacts the static contact.

[0006] Furthermore, a main slit is provided between the main drive sheet body and the main sheet body, and the main slit extends from one side of the moving contact point around the moving contact point to the other side of the moving contact point until the slit penetrates the edge of the main sheet body on the other side of the moving contact point, so that one end of the main drive sheet body is connected to the main sheet body, and the other end of the main drive sheet body is detached from the main sheet body.

[0007] Furthermore, the main driving sheet body is provided with a main connecting sheet for connecting the push card, the width of the main connecting sheet is smaller than the width of the main sheet body, and the main connecting sheet is located in the length direction of the main sheet body and on one side of the moving contact.

[0008] Furthermore, the main sheet body is provided with a main mounting hole for mounting the moving contact, and the end of the main connecting sheet is provided with an anti-detachment portion for preventing the push card from detaching.

[0009] Furthermore, the movable spring sheet includes a main bending portion, one side of which is connected to the main sheet body, and the other side of which is connected to a main fixing portion for connecting to a fixing frame, so that the main fixing portion and the main sheet body are located at different heights.

[0010] Furthermore, it also includes a secondary movable spring sheet, which includes a secondary bending portion, and the secondary fixing portion and the secondary sheet body are connected on both sides of the secondary bending portion. The secondary sheet body is provided with a secondary driving sheet body, and the secondary sheet body is provided with a secondary mounting hole. A secondary slit is provided between the secondary driving sheet body and the secondary main sheet body; the main slit and the secondary slit and the main mounting hole and the secondary mounting hole are adapted to each other, and the main bending portion and the secondary bending portion are staggered.

[0011] A relay comprises a base, wherein the base is provided with a first mounting cavity and a second mounting cavity, wherein a magnetic circuit part is mounted in the first mounting cavity, and wherein the second mounting cavity is provided with the above-mentioned dynamic spring device.

[0012] Furthermore, the magnetic circuit part includes a push card, the second installation cavity is provided with a slot, the push card is passed through the slot and extends into the second installation cavity to be connected to the dynamic spring device.

[0013] Furthermore, a fixing groove for fixing the dynamic spring device is provided in the second installation cavity.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model proposes a dynamic spring device, including an active spring piece, the active spring piece includes a main piece body, the main piece body is provided with a dynamic contact, one side of the main piece body is provided with a main driving piece body for connecting to a push card, the push card applies a non-uniform force to the main piece body through the main driving piece body, so that when the main piece body is driven by force, its stress is concentrated on one side, so that the dynamic contact is eccentrically contacted with the static contact, so that under the condition of a large current, the contact molten pool point caused by the instant of connection can be transferred, so that the molten pool point is easy to break when the active spring piece is reset, so as to avoid the adhesion of the contact at the instant of contact, and improve the product life.

[0016] 2. The utility model proposes a dynamic spring device, in which a slit is provided between the main driving sheet and the main sheet, and the main slit extends from one side of the moving contact point around the moving contact point to the other side of the moving contact point until the slit penetrates the edge of the main sheet body on the other side of the moving contact point, so that one end of the main driving sheet body is connected to the main sheet body, and the other end of the driving sheet body is separated from the main sheet body, so that when the main driving sheet body is subjected to force, force is applied to one side of the main sheet body, thereby realizing non-uniform force on the main sheet body.

[0017] 3. The utility model proposes a dynamic spring device, in which a driving sheet body is provided with a main connecting sheet for connecting a push card, wherein the width of the main connecting sheet is smaller than the width of the main sheet body, and the main connecting sheet is located in the length direction of the main sheet body and on one side of the moving contact. Therefore, the connecting sheet only occupies the space in the length direction of the main sheet body and does not occupy the space in the width direction, thereby reducing the width dimension of the relevant relay and reducing the area occupied by the panel.

[0018] 4. The utility model proposes a dynamic spring device, in which the dynamic spring includes a first spring and a second spring, the first spring includes a first bending portion, and the second spring includes a second bending portion. When the first spring and the second spring are connected to each other, the first bending portion and the second bending portion are installed in a staggered manner to prevent the active spring and the secondary dynamic spring from being stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of a dynamic spring device of the utility model;

[0021] Figure 2 It is a cross-sectional view of a dynamic spring device of the utility model;

[0022] Figure 3 A schematic diagram of a dynamic spring device of the utility model;

[0023] Figure 4 It is a schematic diagram of a first spring leaf and a second spring leaf of a dynamic spring device of the utility model;

[0024] Figure 5 It is a schematic diagram of a fixing frame of a dynamic spring device of the utility model;

[0025] Figure 6 A schematic diagram of a static spring device of a dynamic spring device of the utility model;

[0026] Figure 7 It is a contact diagram of a moving contact and a stationary contact in the prior art;

[0027] Figure 8 A schematic diagram of the contact between a moving contact and a stationary contact of a moving spring device of the utility model;

[0028] In the figure, 10', moving contact; 20', static contact; 10, active spring; 101, main bending part; 102, main fixing part; 103, main sheet; 104, main driving sheet; 1041, main connecting sheet; 105, anti-slip part; 106, main mounting hole; 107, main slit; 20, secondary moving spring; 201, secondary bending part; 202, secondary fixing part; 203, secondary sheet; 204, secondary driving sheet; 206, secondary slit; 30, fixing frame; 301, first bracket ; 302, second bracket; 3021, moving spring pin; 40, base; 501, first installation cavity; 502, second installation cavity; 60, slot; 70, coil frame; 80, iron core; 901, first yoke; 902, second yoke; 100, armature; 110, push card; 1201, first fixed groove; 1202, second fixed groove; 1301, static spring sheet; 1302, static contact; 1303, static spring pin; 140, moving contact; 150, elastic device. DETAILED DESCRIPTION

[0029] Combine the following Figure 1-8 The utility model is described in detail.

[0030] A dynamic spring device includes an active spring piece 10, wherein the active spring piece 10 includes a main sheet body 103, the main sheet body 103 is provided with a dynamic contact 140, and one side of the main sheet body 103 is provided with a main driving sheet body 104 for connecting to a push card 110, and the push card 110 applies a non-uniform force to the main sheet body 103 through the main driving sheet body 104, so that when the main sheet body 103 is driven by force, its stress is concentrated on one side, so that the dynamic contact 140 eccentrically contacts the static contact 1302, so that under the condition of a large current, the contact molten pool point caused by the instant of connection can be transferred, so that the molten pool point is easy to break when the active spring piece 10 is reset, so as to avoid the adhesion of the contacts at the instant of contact, and improve the product life.

[0031] In this embodiment, a main slit 107 is provided between the main driving sheet 104 and the main sheet 103, and the main slit 107 extends from one side of the moving contact 140 around the moving contact 140 to the other side of the moving contact 140 until the slit penetrates the edge of the main sheet 103 on the other side of the moving contact 140, so that one end of the main driving sheet 104 is connected to the main sheet 103, and the other end of the main driving sheet 104 is detached from the main sheet 103, so that when the main driving sheet 104 is subjected to force, force is applied to one side of the main sheet 103, thereby realizing uneven force on the main sheet 103.

[0032] In this embodiment, Figure 7As shown, when the main sheet 103 is uniformly stressed, the moving contact 10' contacts the static contact 20'. At this time, the moving contact 10' and the static contact 20' are coaxially arranged, and the molten pool generated between the two and the moving contact 10' and the static contact 20' are symmetrically distributed relative to the axis. Therefore, when the main sheet needs to be reset, the molten pool is uniformly stressed and difficult to break, resulting in the moving contact 10' and the static contact 20' sticking to each other and unable to separate, thereby causing the relay to fail; Figure 8 As shown, when the main sheet body 103 is subjected to non-uniform force, the moving contact 140 eccentrically contacts the static contact 1302, that is, the axis between the moving contact 140 and the static contact 1302 is non-coaxially arranged, and there is a certain angle between the two axes. The molten pool generated between the two and the moving contact 140 and the static contact 1302 are asymmetrically distributed relative to the axis. Therefore, when the main sheet body 103 needs to be reset, the molten pool at the contact point is transferred due to the non-uniform force on the main sheet body, and the adhesion force of the molten pool at the final contact point position will become smaller. In the process of releasing and disconnecting the main sheet body, the moving contact 140 is easier to separate from the static contact 1302, thereby extending the life of the relay.

[0033] In this embodiment, the main driving sheet body 104 is provided with a main connecting sheet 1041 for connecting the push card 110, the width of the main connecting sheet 1041 is smaller than the width of the main sheet body 103, and the main connecting sheet 1041 is located in the length direction of the main sheet body 103 and on one side of the moving contact 140. Therefore, the main connecting sheet 1041 only occupies the space in the length direction of the main sheet body 103, and does not occupy the space in the width direction, thereby reducing the width size of the relevant relay and reducing the area occupied by the panel. Further, the main sheet body 103 is provided with a main mounting hole 106 for mounting the moving contact 140, and the end of the main connecting sheet 1041 is provided with an anti-detachment portion 105 for preventing the push card 110 from detaching.

[0034] In this embodiment, the active spring sheet 10 includes a main bending portion 101, one side of the main bending portion 101 is connected to a main sheet body 103, and the other side of the main bending portion 101 is connected to a main fixing portion 102 for connecting to the fixing frame 30, so that the main fixing portion 102 and the main sheet body 103 are located at different heights.

[0035] In this embodiment, a secondary movable spring 20 is also included, and the secondary movable spring 20 includes a secondary bending portion 201, and the secondary fixing portion 202 and the secondary sheet body 203 are connected on both sides of the secondary bending portion 201. The secondary sheet body 203 is provided with a secondary driving sheet body 204, and the secondary sheet body 203 is provided with a secondary mounting hole. A secondary slit 206 is provided between the secondary driving sheet body 204 and the secondary main sheet body 103; the main slit 107 and the secondary slit 206 and the main mounting hole 106 and the secondary mounting hole are adapted to each other, and the main bending portion 101 and the secondary bending portion 201 are installed in an offset manner to prevent the active spring 10 and the secondary movable spring 20 from getting stuck.

[0036] In this embodiment, a convex portion is provided at one end of the fixing frame 30, and a connecting hole adapted to the convex portion is provided at the root portion, specifically, a first connecting hole and a second connecting hole are provided at the first root portion and the second root portion, respectively. A dynamic spring pin 3021 is provided at one side of the fixing frame 30 away from the convex portion.

[0037] In this embodiment, the fixing frame 30 includes a first bracket 301 and a second bracket 302 which are vertically connected to each other. The first bracket 301 and the second bracket 302 are L-shaped. A convex portion is provided at the bottom of the first bracket 301, and a dynamic spring pin 3021 is provided on the side of the second bracket 302.

[0038] A relay comprises a base 40, wherein the base 40 is provided with a first mounting cavity 501 and a second mounting cavity 502, wherein a magnetic circuit part is mounted in the first mounting cavity 501, and the second mounting cavity 502 is provided with a movable spring device as described above.

[0039] In this embodiment, the magnetic circuit part includes a coil frame 70, an iron core 80 is arranged inside the coil frame 70, an enameled wire is wound outside the coil frame 70, and the two ends of the iron core 80 are respectively connected to a first yoke 901 and a second yoke 902. Specifically, the iron core 80 is provided with protrusions at both ends along its axis, one end of the first yoke 901 is a knife-edge pole surface, and a protrusion is provided in the middle to rivet the elastic device 150, and the first yoke 901 is provided with a first connecting hole adapted to the protrusion, and the second yoke 902 is L-shaped, one end of which is an L pole surface, and the other end is provided with a second connecting hole adapted to the protrusion. The first yoke 901 is connected to the armature 100 through the elastic device 150, and the end of the armature 100 is provided with a push card 110, and the second installation cavity 502 is provided with a slot 60, and the push card 110 is inserted into the slot 60 and extends into the second installation cavity 502 to connect to the dynamic spring device.

[0040] In this embodiment, a U-shaped groove is provided at one end of the push card 110, and two opposite walls inside the U-shaped groove are respectively provided with a first groove, and a second groove is provided at one end of the armature 100 connected to the push card 110. During assembly, the U-shaped groove is propped open by a tool, and then the end of the armature 100 provided with the second groove is inserted into the U-shaped groove, and the tool is released to allow the first groove to be inserted into the second groove. A through hole is provided at the other end of the push card 110, and the anti-slip portion 105 of the first spring slot 60 is passed through the through hole.

[0041] In this embodiment, a fixing groove for fixing the dynamic spring device is provided in the second installation cavity 502. Specifically, the fixing groove includes a first fixing groove 1201 and a second fixing groove 1202, the first bracket 301 is inserted into the first fixing groove 1201, the second bracket 302 is inserted into the second fixing groove 1202, and a static spring device is provided in the second installation cavity 502, the static spring device includes a static spring piece 1301 and a static contact 1302 provided on the static spring piece 1301, the static spring piece 1301 is provided with a static spring pin 1303, and the static spring pin 1303 is penetrated through the base 40.

[0042] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A dynamic spring device, characterized in that: It includes an active reed, which includes a main sheet body. The main sheet body is provided with a moving contact. One side of the main sheet body is provided with a main driving sheet body for connecting to a push card. The push card applies non-uniform force to the main sheet body through the main driving sheet body, so that the moving contact eccentrically contacts the static contact.

2. A dynamic spring device according to claim 1, characterized in that: A main slit is provided between the main driving sheet body and the main sheet body, and the main slit extends from one side of the moving contact point around the moving contact point to the other side of the moving contact point until the slit penetrates the edge of the main sheet body on the other side of the moving contact point, so that one end of the main driving sheet body is connected to the main sheet body, and the other end of the main driving sheet body is detached from the main sheet body.

3. A dynamic spring device according to claim 2, characterized in that: The main driving sheet body is provided with a main connecting sheet for connecting the push card, the width of the main connecting sheet is smaller than the width of the main sheet body, and the main connecting sheet is located in the length direction of the main sheet body and on one side of the moving contact.

4. A dynamic spring device according to claim 3, characterized in that: The main sheet body is provided with a main mounting hole for mounting a moving contact, and the end of the main connecting sheet is provided with an anti-detachment portion for preventing the push card from detaching.

5. A dynamic spring device according to claim 4, characterized in that: The active spring sheet comprises a main bending portion, one side of the main bending portion is connected to the main sheet body, and the other side of the main bending portion is connected to a main fixing portion for connecting to a fixing frame, so that the main fixing portion and the main sheet body are located at different heights.

6. A dynamic spring device according to claim 5, characterized in that: It also includes a secondary movable spring, which includes a secondary bending portion, and secondary fixing portions and a secondary sheet body are connected on both sides of the secondary bending portion. The secondary sheet body is provided with a secondary driving sheet body, and the secondary sheet body is provided with a secondary mounting hole. A secondary slit is provided between the secondary driving sheet body and the secondary main sheet body; the main slit and the secondary slit, as well as the main mounting hole and the secondary mounting hole are adapted to each other, and the main bending portion and the secondary bending portion are staggered.

7. A relay, comprising a base, wherein the base is provided with a first mounting cavity and a second mounting cavity, wherein: A magnetic circuit portion is installed in the first installation cavity, and a dynamic spring device as described in any one of claims 1 to 6 is provided in the second installation cavity.

8. A relay as claimed in claim 7, characterized in that: The magnetic circuit part includes a push card, the second installation cavity is provided with a slot, the push card is passed through the slot and extends into the second installation cavity to be connected to the dynamic spring device.

9. A relay as claimed in claim 8, characterized in that: A fixing groove for fixing the dynamic spring device is provided in the second installation cavity.

Images