CN116705556A - Take leading-out piece of locate function - Google Patents

Abstract

The invention provides a leading-out sheet with a positioning function, which is a movable reed leading-out sheet of an electromagnetic relay, wherein the leading-out sheet is electrically connected with a movable reed, the leading-out sheet is provided with a flat segment, the flat segment extends to two sides of a contact point of the movable reed, and the flat segment is tightly matched with the movable reed in an attaching way; the tail sections of the flat sections are tightly attached to the movable reeds on the two sides right behind the contact cap, so that energy during release of the movable reeds can be absorbed, and secondary connection of the electromagnetic relay caused by rebound of the movable reeds is prevented. And a slot is punched in the middle of the leading-out sheet, so that the position of the contact rod part is kept away. The two side arms are respectively arranged in a left-right inclined way, so that one part of the two side flat segments is just arranged at the slot of the movable reed and is not contacted with the movable reed, and the accumulation of splashes generated in the test process between the movable reed and the leading-out sheet can be reduced.

Description

Take leading-out piece of locate function

Technical Field

The invention relates to the field of electromagnetic relays, in particular to an improvement of a movable spring leading-out sheet.

Background

Electromagnetic relays generally include a base, a housing, a magnetic circuit portion including a bobbin, an enamel wire, an iron core, a yoke, and an armature, a moving spring portion, and a stationary spring portion. The movable spring part comprises a movable spring contact part and a movable spring leading-out sheet simultaneously provided with QC and PCB leading-out terminals, and the static spring part comprises a contact and a static spring simultaneously provided with QC and PCB leading-out terminals. And the movable spring part and the static spring part are arranged on the base, and a cavity is arranged on the base and is used for placing the magnetic circuit part to form isolation with the contact system.

The prior art solution is to add a positioning piece part to absorb the energy of the release process of the movable reed so as to avoid the secondary connection of the movable reed. This solution requires an increase in the number of parts of the product, and inevitably also increases the assembly process, thus increasing the production costs of the product. The addition of a part requires the addition of corresponding placement positions in the internal space of the product, and therefore, the volume of the relay is increased.

In another prior art scheme, the corresponding small arm limiting structural feature is directly designed on the lead-out sheet, the feature extends to the right rear of the contact rod part in a lengthening and bending process mode, the structure of the lead-out sheet can be more complex, therefore, the bending process step of the die is required to be added, the difficulty of the production and manufacturing of the die or the tool is increased, and the cost is higher. And the small arm of the leading-out sheet directly abuts against the contact rod part, the contact rod part and the small arm of the leading-out sheet are worn after repeated actions of the contact, the small arm is easy to deform and skew after long-time actions, and the position accuracy of buffering is reduced. And more metal splashes can be generated when the contact is collided for many times, so that the insulating property of the product is reduced.

Disclosure of Invention

To this end, the present invention provides a lead-out tab with a positioning function, in view of the above-mentioned problems.

The invention is realized by the following scheme:

the invention provides a lead-out sheet with a positioning function, which comprises a first part and a second part which are connected together, wherein the first part is used for being electrically connected with a movable reed, one end of the first part, which faces the second part, is defined as an upper end, one end, which is far away from the second part, is defined as a lower end, the first part is provided with a flat segment, and the first part is configured to: after the leading-out sheet and the movable reed are assembled, the flat segment can be tightly attached to the movable reed, and the flat segment and a movable contact of the movable reed have an overlapping part in the height direction.

Wherein in one embodiment, a slot is provided in the middle of the tab, the slot spanning the first and second portions of the tab.

Wherein in one embodiment the width of the slot is narrow at the top and wide at the bottom.

Wherein, in one embodiment, the movable contact includes a contact cap and a contact rod, the contact cap is riveted on the movable reed through the contact rod, and the slot yields the position of the contact rod.

Wherein, in one embodiment, the lower part of the slot is a width gradual change part, the upper part of the slot is a rectangular part, and the rectangular part is connected with the width gradual change part; the width of the rectangular part is smaller than the diameter of the contact cap and larger than the diameter of the riveted contact rod, and the width of the rectangular part is made to be as small as possible.

In one embodiment, two movable spring grooves are formed on the movable spring, and the movable spring pushes the movable arm through the two movable spring grooves; the leading-out sheet is provided with two side arms at the position of the width gradual change part, the two side arms are respectively arranged in a tilting way towards the left and the right, and the tilting degree of the two side arms is enough to enable a part of the two side arms to be just placed at a movable spring groove arranged on the movable spring and not to be contacted with the movable spring.

Wherein, in one embodiment, the flat segment forms two vertical small segments at the rectangular part, and the vertical small segments are respectively connected with the upper ends of the two side arms; the vertical small section is limited behind the reed at the position of the contact cap.

In one embodiment, the movable spring leading-out piece further comprises a third part, the second part is connected between the first part and the third part, and the whole formed by the first part, the second part and the third part is bent in a Z shape.

Wherein, in one embodiment, the upper end of the flat segment is not lower than the movable contact center of the movable contact spring.

Wherein in one embodiment, the slots are formed by blanking.

Wherein, in one embodiment, the lower end of the first part can be electrically connected with the movable reed through riveting.

The invention also provides an electromagnetic relay with the positioning function leading-out sheet.

The technical scheme provided by the invention has the following technical effects:

1. the movable spring leading-out piece flat segment extends to two sides of the contact position of the movable spring, the whole flat segment is tightly matched with the movable spring in a sticking mode, the bending position of the tail segment is tightly attached to the movable spring on two sides right behind the contact cap, energy during release of the movable spring can be absorbed, and secondary connection caused by rebound of the movable spring is prevented. The movable spring leading-out sheet is designed to be in close fit with the movable spring sheet, has a simple structure and plays a role in positioning, and meanwhile, the problem that the existing positioning sheet scheme is easy to skew and abrade is solved. And the design reduces the parts material investment and the product assembly process, and reduces the cost of the product.

2. And a slot is punched in the middle of the leading-out sheet, and the width of the slot is narrow at the upper part and wide at the lower part. The two side arms of the leading-out sheet are respectively arranged in a left-right inclined way, so that one part of the flat section is just placed at the movable spring groove of the movable spring and is not contacted with the movable spring, and the accumulation of splashes generated in the test process between the movable spring and the leading-out sheet can be reduced.

Drawings

FIG. 1 is an electromagnetic relay assembly diagram;

fig. 2a is a side view of the moving spring drawing sheet, and fig. 2b is a front view of the moving spring drawing sheet;

fig. 3a is a front view of the assembled movable reed and movable reed drawing sheet, and fig. 3b is a side view of the assembled movable reed and movable reed drawing sheet;

FIG. 4 is an enlarged view at A in FIG. 3 b;

FIG. 5 is a rear view of the movable reed assembled with the movable reed tab;

FIG. 6 is a schematic view of the present invention with a larger slot space;

Detailed Description

For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

The invention will now be further described with reference to the drawings and detailed description.

Referring to fig. 1 to 5, the present embodiment provides an electromagnetic relay with a positioning function tab, which includes a contact system 100, a magnetic circuit system 200, a base 300, and a pusher card 400. The contact system 100 comprises a static spring part 110 and a dynamic spring part 120, wherein the static spring part 110 and the dynamic spring part 120 are fixed on a base 300 in a plug-in manner; the movable spring part 120 comprises a movable spring 130 and a movable spring leading-out sheet 140 with a positioning function, and a leading-out terminal is arranged on the movable spring leading-out sheet 140; the movable contact 131 is arranged on the movable reed 130, the movable contact 131 comprises a contact cap 132 and a contact rod 133, and the contact cap 132 is riveted on the movable reed 130 through the contact rod 133; the stationary spring part 110 includes a stationary contact and a stationary reed having a lead-out terminal; the lead terminals of the movable spring part 120 and the stationary spring part 110 are used for connection with external lines to be controlled. The magnetic circuit 200 includes a coil 230 formed by winding an enameled wire on a bobbin 240, the coil 230 is sleeved on a structure formed by the iron core 220 and the yoke 250, and forms a magnetic circuit with the armature 210, and the magnetic circuit 200 is mounted in a cavity of the base 300. The armature 210 is connected to the pusher card 400, and the pusher card 400 can abut against the movable spring 130.

When the electromagnetic relay performs a closing action, the coil 230 is electrified, magnetic force is generated in the magnetic loop, the armature 210 is attracted by the magnetic force, so that the push card 400 is pushed to translate towards the movable reed 130, the movable reed 130 abutted against the push card 400 is elastically deformed due to the translation of the push card 400, the movable contact 131 on the movable reed 130 is contacted with the static contact on the static reed, and the circuit is conducted; when the electromagnetic relay is disconnected, the coil 230 is powered off, no magnetic force is generated in the magnetic circuit, the armature 210 is released, the movable spring 130 is not pushed by the push card 400, the movable spring 130 is released to swing back, so that the movable contact 131 on the movable spring 130 is separated from the static contact on the static spring, and the circuit is disconnected.

Preferably, referring to fig. 5, in order to facilitate deformation of the movable reed 130 and thus facilitate closing action of the electromagnetic relay, two movable reed grooves 134 are provided on the movable reed 130, and the movable reed 130 forms two movable reed pushing arms 135 via the two movable reed grooves 134. The push card 400 can abut against the movable spring push arm 135 to push the movable reed 130 to deform. However, the structure of the corresponding assembly of the push card 400 and the movable reed 130 may not be limited to the above-described form, and for example, the push card 400 may be pushed against the middle of the movable reed 130.

Referring to fig. 1-2, the movable spring lead-out piece 140 is bent in a zigzag shape, and includes a first portion 141, a second portion 142 and a third portion 143 connected together, where the second portion 142 is located between the first portion 141 and the third portion 143; the third portion 143 of the moving spring pull-out piece 140 can be used as a pull-out terminal. The whole formed by the first part 141, the second part 142 and the third part 143 of the movable spring leading-out piece 140 is bent in a Z shape, so that a larger electric gap exists between leading-out terminals of the movable spring part 120 and the static spring part 110, and the safety of a circuit is improved; in addition, the bending position where the second portion 142 and the third portion 143 are connected may be used as a force-bearing supporting point (as shown in fig. 1) of the moving spring drawing sheet 140 fixed on the base 300, that is, the bending position may abut against a rib on the upper side of the base 300, so as to further stabilize the moving spring drawing sheet 140, which is favorable for maintaining reliability of the moving spring drawing sheet 140 after multiple actions, and make the fixing of the moving spring drawing sheet 140 more stable. The angle of the zigzag bending and the lengths of the parts can be adjusted according to the specific positions of the lead-out terminals, and the specific limitation is not imposed here.

Referring to fig. 1-3, an end of the first portion 141 facing the second portion 142 is defined as an upper end, and an end far from the second portion 142 is defined as a lower end; the lower end of the first portion 141 is formed downward with an elongated pin that can serve as a lead-out terminal of the moving spring lead-out sheet 140 in the other direction.

Referring to fig. 2-3, first portion 141 has a flat segment 148 and movable contact 130 is riveted to flat segment 148 of movable contact tab 140 to provide an electrical connection between movable contact 130 and movable contact tab 140. However, those skilled in the art will recognize that the connection between the movable reed 130 and the movable reed drawing sheet 140 is not limited to the riveting method, and any connection method that allows the movable reed 130 and the movable reed drawing sheet 140 to have sufficient mechanical connection strength and enable the electrical connection may be used in the present embodiment, such as welding.

After connecting movable reed 130 to flat segment 148 of movable reed extractor 140 by riveting or other connection, the entire movable reed 130 is in close fit with flat segment 148. Alternatively, the flat segment 148 is located at the upper end of the first portion 141, or the entirety of the first portion 141 is provided as the flat segment 148. When the whole of the first portion 141 is the flat segment 148, the whole movable reed 130 is tightly fitted with the flat segment 148, and the whole movable reed 130 and the whole flat segment 148 can be used as the fixing and clamping parts, so that a larger operation space is provided during the connection process, and the whole movable reed 130 and the whole flat segment 148 can be used as the fixing and clamping parts, so that the clamping of the parts is more stable during the connection operation, and the connection of the two parts is facilitated.

Referring to fig. 2-3, a slot 144 is provided in the middle of the moving spring lead-out piece 140, and the slot 144 spans the first portion 141 and the second portion 142 of the moving spring lead-out piece 140. The arrangement of the slot 144 spanning the first portion 141 and the second portion 142 of the movable spring lead-out piece 140 is beneficial to the metal splashes falling onto the base through the slot 144, and reduces the probability of the metal splashes being blocked between the movable spring 130 and the movable spring lead-out piece 140.

The slot 144 yields the position of the contact bar 133. The slots 144 may be created by any suitable machining means for slot forming including, but not limited to, blanking, wire cutting, laser cutting. The upper portion of the slot 144 is rectangular and the width of the lower portion is gradually widened so that the slot 144 is in the form of a narrower upper portion and a wider lower portion. Compared to the arrangement where the width of the slot 144 is constant, this embodiment has a larger slot space, as shown by the arrow in fig. 6, which is more advantageous for the metal splatter to drop onto the base through the slot 144.

It should be noted that, the top end of the slot 144 may be provided with a process notch 145 at each of left and right positions based on the process requirement, and the process notch 145 is only provided to accommodate the requirement of the bending process of the moving spring leading-out piece 140, and should not be considered as actually influencing or changing the shape and size of the slot 144.

The rectangular slot width of the slot 144 is smaller than the diameter width of the contact cap 132 on the movable contact 130 and larger than the diameter width of the riveted contact lever 133 on the movable contact 130, and the slot width of the rectangular portion is made as small as possible. Therefore, the slot 144 can give way to the contact rod 133, and meanwhile, the movable spring leading-out piece 140 can be ensured to have the largest area behind the contact cap 132, so that the kinetic energy absorbing effect is improved as described below. In particular, in the case where the rectangular portion of the groove 144 of this embodiment has a width substantially corresponding to the outer diameter of the contact rod 133, the positioning of the mounting can be assisted by the cooperation of the groove 144 and the contact rod 133 when the movable reed 130 and the movable reed drawing-out piece 140 are mounted in flat contact.

Alternatively, movable contact 131 can be attached to one face of movable reed 130 in other ways known to those skilled in the art without forming a protrusion on the other face of movable reed 130, so that movable reed drawing tab 140 may not be formed with a groove for avoidance. Including welding, integral molding, etc.

Referring to fig. 2 to 4, the moving spring guide-out piece 140 forms two side arms 146 at the lower portion where the width of the slot 144 is gradually widened. The flat segment 148 forms two vertical small segments 147 at the rectangular part, and the vertical small segments 147 are respectively connected with the upper ends of the two side arms 146; the vertical segment 147 is located just behind the reed where the contact cap 132 is located, as shown in fig. 4. Referring to fig. 3-5, because movable reed 130 is riveted to flat segment 148 of movable reed extractor 140, flat segment 148 is in close fit with movable reed 130. The flat segment 148 of the movable spring leading-out sheet 140 is bent away from the reed until contacting the reed right behind the contact cap 132, namely, the flat segment 148 extends to two sides of the movable contact 131 of the movable reed 130, and the end segments of the flat segment 148 are tightly attached to the movable reeds 130 on two sides right behind the contact cap 132. Therefore, when the electromagnetic relay performs the opening action, the kinetic energy of the contact end is maximum in the process that the movable contact 130 is released to swing back, since the end sections of the flat sections 148 are tightly attached to the movable contact 130 on both sides right behind the contact cap 132, that is, the vertical small sections 147 are limited right behind the movable contact 131 of the movable contact 130 in the position where the contact cap 132 is located, and since the flat sections 148 and the movable contact 131 of the movable contact 130 have overlapping parts in the height direction, preferably, the upper ends of the flat sections 148 are not lower than the center of the movable contact 131 of the movable contact 130, the vertical small sections 147 can absorb the kinetic energy of the contact end to the greatest extent, and the effect of absorbing energy is best in the position, so that the secondary connection of the electromagnetic relay is prevented due to the rebound of the movable contact 130. Because the flat segment 148 is tightly matched with the whole movable reed 130, the problem of reduced limiting precision caused by abrasion of the limiting position does not exist.

Referring to fig. 2 and 5, the two side arms 146 are disposed obliquely to the left and right, and the degree of inclination of the two side arms 146 is sufficient to make a portion of the two side arms 146 just put in the moving spring slot 134 of the moving spring 130 and not contact with the moving spring 130, and under the condition that the area of the two side arms 146 is unchanged, the degree of inclination of the two side arms 146 makes the area of the two side arms 146 in the moving spring slot 134 be larger, so that the overlapping area between the two side arms 146 and the moving spring 130 is smaller, i.e. the flat segment 148 of the moving spring leading-out piece 140 and the moving spring 130 have a larger staggering space. Also, referring to fig. 6, the width of the slot at the two side arms 146 of the present embodiment is gradually increased from top to bottom, and compared to the vertical arrangement of the two side arms 146, there is a larger slot space in the present embodiment, as shown by the arrow in fig. 6. In the use process of the electromagnetic relay, a certain probability of high temperature occurs at the movable contact 131, at the moment of switching on or switching off the electromagnetic relay, the high temperature can cause splashes to splash out of the movable contact 131, the splashes normally fall in the height direction, because a larger staggered space exists between the flat segment 148 of the movable spring leading-out piece 140 and the movable spring 130 and the movable spring leading-out piece 140 has a larger slotting space, if the splashes are blocked at the higher position of the joint position of the movable spring 130 and the movable spring leading-out piece 140, the bottom of the splashes which fall down after the actions again is the staggered position between the flat segment 148 and the movable spring 130 or the slotted position of the movable spring leading-out piece 140, so that the splashes slide out onto the base 300. The arrangement of this embodiment can minimize the accumulation of splashes generated during use between the movable reed 130 and the movable reed drawing tab 140.

The movable spring lead-out piece 140 with the positioning function provided by the embodiment is suitable for all electromagnetic relays, including alternating current, direct current, monostable electromagnetic relays, magnetic latching electromagnetic relays and the like.

In addition, although the above embodiment is described taking a moving spring lead-out piece applied to an electromagnetic relay as an example, the moving spring lead-out piece has a function of preventing a moving spring from rebounding to cause secondary turn-on, and thus can be applied to other switching devices, such as a click switch, as an electrode lead-out piece.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (12)

1. A lead-out tab with a positioning function, the lead-out tab comprising a first portion and a second portion connected together, the first portion being configured to be electrically connected to a movable contact spring, the first portion being defined such that an end of the first portion facing the second portion is an upper end and an end of the first portion facing away from the second portion is a lower end, the first portion having a flat segment, the first portion being configured to: after the leading-out sheet and the movable reed are assembled, the flat segment can be tightly attached to the movable reed, and the flat segment and a movable contact of the movable reed have an overlapping part in the height direction.

2. The tab of claim 1, wherein: a slot is arranged in the middle of the leading-out sheet, and the slot spans the first part and the second part of the leading-out sheet.

3. The tab of claim 2, wherein: the width of the slot is narrow at the upper part and wide at the lower part.

4. A tab according to claim 3, wherein: the movable contact comprises a contact cap and a contact rod, the contact cap is riveted on the movable reed through the contact rod, and the slot is used for yielding the position of the contact rod.

5. A tab according to claim 3, wherein: the lower part of the slot is a width gradual change part, the upper part of the slot is a rectangular part, and the rectangular part is connected with the width gradual change part; the width of the rectangular part is smaller than the diameter of the contact cap and larger than the diameter of the riveted contact rod, and the width of the rectangular part is made to be as small as possible.

6. The tab of claim 5, wherein: the movable reed is provided with two movable reed grooves, and the movable reed forms two movable reed pushing arms through the two movable reed grooves; the leading-out sheet is provided with two side arms at the position of the width gradual change part, the two side arms are respectively arranged in a tilting way towards the left and the right, and the tilting degree of the two side arms is enough to enable a part of the two side arms to be just placed at a movable spring groove arranged on the movable spring and not to be contacted with the movable spring.

7. The tab of claim 6, wherein: the flat segment forms two vertical small segments at the rectangular part, and the vertical small segments are respectively connected with the upper ends of the two side arms; the vertical small section is limited behind the reed at the position of the contact cap.

8. The tab of claim 7, wherein: the movable spring leading-out piece also comprises a third part, the second part is connected between the first part and the third part, and the whole formed by the first part, the second part and the third part is bent in a Z shape.

9. The tab of claim 8, wherein: the upper end of the flat segment is not lower than the movable contact center of the movable contact spring.

10. The tab of any one of claims 2-9, wherein: the slots are formed by blanking.

11. The tab of any one of claims 1-9, wherein: the lower end of the first part can be electrically connected with the movable reed through riveting.

12. An electromagnetic relay with a positioning function tab, said tab being the tab of any one of claims 1-11.