Cooperation structure of a moving spring and a moving spring lead-out piece and electromagnetic relay

Abstract

The application provides a matching structure of a moving spring sheet and a moving spring lead-out sheet, which are used in an electromagnetic relay. The moving spring sheet and the moving spring lead-out sheet are electrically connected. The moving spring sheet can be deformed by a driving force to cause the electromagnetic relay to be turned on. The moving spring sheet is provided with slots on both sides to form two moving spring small arms. The driving force acts on the two moving spring small arms, and the two moving spring small arms are bent towards a direction opposite to the direction of the driving force. In the initial state, the two small arms and the middle spring sheet are first formed with a certain misalignment to compensate for the waste of the movement lag of the middle arm spring sheet in the closing process of the whole moving spring sheet, thereby reducing the coil power consumption. The two arms of the moving spring lead-out sheet are provided with protrusions. The two moving spring small arms after being bent abut against the moving spring lead-out sheet through the protrusions and generate a pre-pressure, which ensures the push empty stroke of the product, thereby ensuring that the product can still be reliably attracted under the premise of not increasing the power consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electromagnetic relays, in particular to a matching structure of a moving spring sheet and a moving spring lead-out sheet. BACKGROUND

[0002] An electromagnetic relay generally comprises a base, a housing, a magnetic circuit part, a moving spring part, and a static spring part. The magnetic circuit part comprises a coil holder, an enameled wire, an iron core, a yoke, and an armature. The moving spring part comprises a moving spring sheet, a contact, and a moving spring lead-out sheet. The static spring part comprises a contact and a static spring sheet. The moving spring part, the static spring part, and a positioning sheet are installed on the base. The base is provided with a cavity for placing the magnetic circuit part and the contact system to form an isolation.

[0003] The existing double-slot scheme of the moving spring sheet can effectively solve the secondary attraction problem and improve the long-life capability of the product. Since the moving spring is slotted on both sides, the two sides are relatively soft. Therefore, during the actual movement process, the two sides of the moving spring sheet will have a deformation process first, and then the middle spring sheet will be driven to move together after a certain degree of deformation. Therefore, at the moment when the contact is just contacted, the moving spring main arm spring sheet and the two small arms will have a wasted stroke (such as Figures la-lb : the distance between the two small arms and the middle spring sheet is staggered). Therefore, a larger armature stroke is needed to compensate for this wasted stroke and ensure the subsequent overstroke of the product. A larger armature stroke is not conducive to the attraction of the product, and even means that a larger coil power consumption is needed.

[0004] In addition, the existing scheme of the matching design of the moving spring sheet and the push card generally has a push card idle stroke S (such as Figures 2a-2b ) to ensure the reliable attraction consistency of the product. At the moment when the armature starts, the idle stroke is used to get a starting speed to impact the moving spring sheet, so that the product can be more easily attracted.

[0005] The existing scheme of the matching design of the moving spring sheet and the push card generally has the defect of wasting coil power consumption due to the too large armature stroke. SUMMARY

[0006] Therefore, in view of the above problems, the present application provides a matching structure of a moving spring sheet and a moving spring lead-out sheet and an electromagnetic relay.

[0007] The present application adopts the following scheme to realize:

[0008] The application provides a matching structure of a moving spring sheet and a moving spring lead-out sheet, the moving spring sheet and the moving spring lead-out sheet are electrically connected, the moving spring sheet can be deformed by the driving force, characterized in that the moving spring sheet comprises a moving spring main arm provided with a moving contact and a moving spring pushing arm connected with the moving spring main arm, the moving spring sheet is configured to drive the moving spring main arm to move towards a static contact by the driving force acting on the moving spring pushing arm, wherein the moving spring pushing arm is pre-bent towards the direction opposite to the driving force direction.

[0009] In one embodiment, the moving spring lead-out sheet is provided with a limiting part which can be in contact with the moving spring pushing arm, so that the limiting part can limit the deformation of the moving spring pushing arm caused by the pre-bending.

[0010] In one embodiment, the limiting part is a convex part provided at the appropriate position of the two side edges of the moving spring lead-out sheet, the pre-bent moving spring pushing arm is in contact with the moving spring lead-out sheet through the convex part and generates a pre-pressure.

[0011] In one embodiment, the limiting part is a widened part formed by widening the appropriate position of the two side edges of the moving spring lead-out sheet, the pre-bent moving spring pushing arm is in contact with the moving spring lead-out sheet through the widened part and generates a pre-pressure.

[0012] In one embodiment, the limiting part is a raised part formed by raising the base of the moving spring lead-out sheet, the pre-bent moving spring pushing arm is in contact with the moving spring lead-out sheet through the raised part and generates a pre-pressure.

[0013] In one embodiment, the pre-bending degree is such that when the moving spring pushing arm is deformed to be flush with the moving spring main arm by the driving force, the moving spring main arm is driven to move towards the static contact.

[0014] In one embodiment, the moving spring main arm and the moving spring pushing arm are isolated by a moving spring groove formed on the moving spring sheet.

[0015] In one embodiment, two moving spring grooves are formed on the two sides of the moving spring sheet to form two moving spring pushing arms, and the moving spring main arm is between the two moving spring pushing arms.

[0016] In one embodiment, a slot is provided in the middle of the moving spring lead-out sheet, the slot accommodates the position of the contact rod, and the moving spring lead-out sheet forms two side arms at the slot; the slot is narrow at the top and wide at the bottom, the lower part of the slot is a width gradient part, the upper part of the slot is a rectangular part, and the width gradient part is connected with the rectangular part.

[0017] The application also provides an electromagnetic relay, which comprises the matching structure of the moving spring leaf and the moving spring lead-out leaf in any of the above embodiments, a static contact and a pushing mechanism, wherein the pushing mechanism acts on the moving spring pushing arm.

[0018] In one embodiment, the pushing mechanism and the moving spring pushing arm have an idle stroke.

[0019] The technical scheme provided by the application has the following technical effects:

[0020] 1. The moving spring leaf is slotted on both sides, and the two sides of the moving spring pushing arm are bent in the opposite direction of the movement of the spring leaf. In the initial state, the two sides of the moving spring pushing arm are first offset from the main arm of the moving spring to compensate for the stroke waste caused by the movement lag of the main arm of the moving spring during the closing process of the moving spring leaf, thereby reducing the power consumption of the coil.

[0021] 2. The two sides of the moving spring pushing arm are limited and supported by the moving spring lead-out leaf to resist the pre-formed offset deformation, which avoids the stroke waste caused by the movement lag of the main arm of the moving spring due to the pre-set elastic potential of the moving spring leaf, and eliminates the impact of the offset deformation of the two sides of the moving spring pushing arm on the pushing idle stroke, thereby ensuring the pushing idle stroke of the product and ensuring the reliable attraction of the product without increasing the power consumption. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure la It is a front view of an electromagnetic relay in the prior art when the contacts are just contacted; Figure lb It is a front view of an electromagnetic relay in the prior art when the contacts are just contacted; Figure la It is an enlarged view of A in FIG. 1;

[0023] Figure 2a It is a front view of an electromagnetic relay in the prior art when the contacts are just contacted; Figure 2b It is a front view of an electromagnetic relay in the prior art when the contacts are just contacted; Figure 2a It is an enlarged view of B in FIG. 2;

[0024] Figure 3 It is an assembly drawing of the assembled electromagnetic relay;

[0025] Figure 4a It is a side view of the moving spring leaf with the two sides of the moving spring pushing arm bent in the opposite direction, Figure 4b It is a front view of the moving spring leaf with the two sides of the moving spring pushing arm bent in the opposite direction, Figure 4c It is a front view of the moving spring leaf with the two sides of the moving spring pushing arm bent in the opposite direction, Figure 4a It is an enlarged view of C in FIG. 3;

[0026] Figure 5 It is a front view of the moving spring lead-out leaf;

[0027] Figure 6a It is a side view of the moving spring leaf and the moving spring lead-out leaf after assembly, Figure 6bFigure 7 is a front view of the assembled moving spring blade and moving spring lead-out blade with a protrusion;

[0028] Figure 7 Figure 8 is a front view of the moving spring lead-out blade with a protrusion;

[0029] Figure 8a Figure 9 is a side view of the assembled moving spring blade and moving spring lead-out blade with a protrusion, Figure 8b Figure 10 is a front view of the assembled moving spring blade and moving spring lead-out blade with a protrusion;

[0030] Figure 9 Figure 11 is a front view of the assembled moving spring blade and moving spring lead-out blade in another embodiment;

[0031] Figure 10 Figure 12 is a front view of the assembled moving spring blade and moving spring lead-out blade in another embodiment. DETAILED DESCRIPTION

[0032] To further illustrate the embodiments, the present application provides accompanying drawings. These drawings are part of the disclosure of the present application and are mainly used to illustrate the embodiments, and can be used to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. Those of ordinary skill in the art should be able to understand other possible embodiments and advantages of the present application in conjunction with these. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0033] The present application is further illustrated in conjunction with the accompanying drawings and specific embodiments.

[0034] Embodiment 1

[0035] Reference Figures 3-6b The present embodiment provides an electromagnetic relay, which comprises a contact system 100, a magnetic circuit system 200, a base 300, and a push card 400. The contact system 100 includes a static spring part 110 and a moving spring part 120, which are inserted and fixed on the base 300; the moving spring part 120 includes a moving spring blade 130 and a moving spring lead-out blade 140, and the moving spring lead-out blade 140 is provided with a lead-out terminal; the moving spring blade 130 is provided with a moving contact 131, which includes a contact cap 132 and a contact rod 133, and the moving contact 131 is riveted to the moving spring blade 130 through the contact rod 133; the static spring part 110 includes a static contact and a static spring blade with a lead-out terminal; the lead-out terminals of the moving spring part 120 and the static spring part 110 are used to connect with external lines required to be controlled. The magnetic circuit system 200 includes a coil 230 wound with enameled wire on a bobbin 240, which is sleeved on a structure composed of an iron core 220 and a yoke 250, and forms a magnetic circuit with an armature 210; the magnetic circuit system 200 is installed in a cavity of the base 300. The armature 210 is connected with the push card 400, and the push card 400 can abut against the moving spring blade 130.

[0036] When the electromagnetic relay performs the closing action, the coil 230 is powered, the magnetic force is generated in the magnetic circuit, the armature 210 is attracted by the magnetic force, thereby pushing the push card 400 to translate towards the dynamic spring leaf 130, the translation of the push card 400 causes the dynamic spring leaf 130 to be elastically deformed, thereby making the dynamic contact 131 on the dynamic spring leaf 130 contact the static contact on the static spring leaf, and the circuit is thus turned on; when the electromagnetic relay performs the opening action, the coil 230 is powered off, the magnetic force is no longer generated in the magnetic circuit, the armature 210 is released, the dynamic spring leaf 130 is no longer pushed by the push card 400, and the dynamic spring leaf 130 is released to swing back, so that the dynamic contact 131 on the dynamic spring leaf 130 is separated from the static contact on the static spring leaf, and the circuit is turned off.

[0037] Referring to Figures 4a-4c In order to facilitate the deformation of the dynamic spring leaf 130, thereby facilitating the closing action of the electromagnetic relay, the dynamic spring leaf 130 is provided with two dynamic spring grooves 134, and the dynamic spring leaf 130 forms two dynamic spring pushing arms 135 via the two dynamic spring grooves 134. The dynamic spring main arm 136 is between the two dynamic spring pushing arms 135. The magnetic circuit system 200 and the push card 400 can act as a pushing mechanism on the dynamic spring pushing arm 135.

[0038] In order to make the contact between the dynamic contact 131 on the dynamic spring leaf 130 and the static contact on the static spring leaf more stable when the electromagnetic relay is closed, the push card 400 generally has an overstroke, that is, after the translation of the push card 400 makes the dynamic contact 131 on the dynamic spring leaf 130 contact the static contact on the static spring leaf, there is still sufficient stroke redundancy of the push card 400.

[0039] Optionally, the number of the dynamic spring grooves 134 and the dynamic spring pushing arms 135 can be one or more, the dynamic spring leaf 130 can form one dynamic spring pushing arm 135 via one dynamic spring groove 134, and the dynamic spring pushing arm 135 can be a cantilever or a ring-shaped arm arranged around the dynamic spring main arm 136 (not shown). The number and configuration of the dynamic spring pushing arm 135 can be different to adapt to the structure of the corresponding assembly part of the push card 400. For example, when the assembly part of the push card 400 and the dynamic spring pushing arm 135 is located in the middle upper end, the dynamic spring pushing arm 135 can be configured in the form of a ring-shaped arm arranged around the dynamic spring main arm 136.

[0040] Optionally, the dynamic contact 131 can be attached to one side of the dynamic spring leaf 130 in other ways known to those skilled in the art, including welding, integral molding, etc.

[0041] The moving spring 130 can be deformed by the driving force to cause the electromagnetic relay to be turned on. The moving spring 130 is provided with moving spring grooves 134 on both sides to form two moving spring pushing arms 135, which are cantilever structures. The driving force acts on the two moving spring pushing arms 135, and the two moving spring pushing arms 135 are pre-bent in a direction opposite to the direction of the driving force. Optionally, the pre-bent position can be located near the root of the cantilever structure of the moving spring pushing arm 135. The driving force for deforming the moving spring 130 is provided by the translation of the pushing card 400. After pre-bending, the two moving spring pushing arms 135 are offset from the moving spring main arm 136 in the thickness direction of the moving spring 130, as shown in Figures 4a-4c When the pushing card 400 is translated and pushes the moving spring pushing arm 135, the moving spring pushing arm 135 and the moving spring main arm 136 will generate a deformation stress, and the deformation stress will gradually increase. Preferably, the degree of pre-bending is such that when the moving spring pushing arm 135 is deformed to be flush with the moving spring main arm 136, the deformation stress increases to be sufficient to cause the moving spring main arm 136 to be driven to move towards the static contact, thereby effectively reducing the travel waste caused by the movement lag of the moving spring main arm 136 during the entire closing process of the moving spring 130, and further reducing the coil power consumption.

[0042] Referring to Figures 6a-6b , the moving spring 130 is riveted to the moving spring lead-out sheet 140 to realize the electrical connection between the moving spring 130 and the moving spring lead-out sheet 140. However, those skilled in the art know that the connection between the moving spring 130 and the moving spring lead-out sheet 140 is not limited to riveting, and any connection method that can provide sufficient mechanical connection strength between the moving spring 130 and the moving spring lead-out sheet 140 and realize electrical connection can achieve the embodiment, such as welding.

[0043] Embodiment 2

[0044] Referring to Figures 7-8bBased on Embodiment 1, in this embodiment, protrusions 143 are provided at appropriate positions on both sides of the movable spring lead-out plate 140. The pre-bent movable spring push arms 135 on both sides can abut against the movable spring lead-out plate 140 through the protrusions 143, thereby limiting the movable spring push arms 135 on both sides of the movable spring plate 130. The pre-bent movable spring push arms 135 are prone to falling backward and abutting against the push card 400, generating a force on the push card 400 and affecting the starting action of the push card 400. That is, the armature 210 needs to overcome this force when initially energized. Therefore, limiting the movable spring push arms 135 on both sides of the movable spring plate 130 can solve the problem of the movable spring push arms 135 falling backward and ensure that the push card of the product has sufficient idle stroke. Due to the existence of the idle stroke, a starting speed is obtained through the idle stroke at the moment when the armature 15 pushes the push card 400 to start, thereby pushing the push card to impact the push spring 130. This makes it easier for the armature to be attracted when the electromagnetic relay is closed, and the electromagnetic relay is easier to perform the closing action.

[0045] As described above, the pre-bent spring push arms 135 and spring main arms 136 on both sides are misaligned in the thickness direction of the spring plate 130. Therefore, after the spring lead-out plates 140 limit the spring push arms 135 on both sides, they abut against each other and generate pre-pressure. Preferably, the abutment between the spring push arms 135 and the spring lead-out plates 140 causes the spring push arms 135 to deform to a position flush with the spring main arms 136. At this time, there is deformation stress between the spring push arms 135 and the spring main arms 136. When the push card 400 moves to abut against the spring push arms 135 and exerts a force on the spring push arms 135, the deformation stress between the spring push arms 135 and the spring main arms 136 increases to a level sufficient to drive the spring main arms 136 of the spring plate 130 toward the stationary contact point, thereby effectively reducing the wasted stroke of the push card 400.

[0046] In other words, in this embodiment 2, the pre-bent moving spring push arm 135 of the moving spring 130 has pre-set elastic potential energy, thus avoiding the wasted stroke caused by the movement lag of the main moving spring arm 136. Furthermore, the pre-bent moving spring push arm 135 on both sides is eliminated from affecting the empty stroke of the push card 400 because the moving spring 130 is limited by the moving spring lead-out piece 140. Through the combination of the bending structure of the push arm 135 and the limiting protrusion of the lead-out piece 140, the problem of wasted stroke due to movement lag is solved, and the empty stroke of the push card 400 of the product is further guaranteed, thereby ensuring that the product can still reliably engage without increasing power consumption.

[0047] Optionally, the two sides of the moving spring lead-out plate 140 do not have protrusions 143, but have the following alternative configurations:

[0048] Optional alternative setting 1, seeFigure 9 The spring lead-out plate 140 is widened at appropriate positions on both sides to form a widened portion 145. The width of the widened side arms 142 is sufficient to allow the pre-bent side spring push arms 135 to abut against the spring lead-out plate 140 through the widened portion 145 as a limiting portion, thereby limiting the side spring push arms of the spring lead-out plate 130.

[0049] Optional alternative setting two, see [link / reference] Figure 10 The bottom 146 of the moving spring lead-out piece 140 has a raised portion 144. The raised portion 144 is provided so that the pre-bent moving spring push arms 135 on both sides can be used as limiting portions to abut against the moving spring lead-out piece 140, thereby limiting the moving spring push arms on both sides of the moving spring piece 130.

[0050] Example 3

[0051] The difference between this embodiment and Embodiment 2 is that, as shown in the following... Figures 7-10 In this embodiment, a slot 141 is provided in the middle of the movable spring lead-out piece 140, and two side arms 142 are formed at the slot 141. The slot 141 can be generated by any processing method suitable for slotting, including but not limited to punching, wire cutting, and laser cutting; the top of the slot 141 can abut against the rib structure on the top of the base 300 (e.g., Figure 3 As shown in Figure 7, this improves the stability of the assembly of the moving spring lead-out piece 140, ensuring its reliability after multiple operations of the electromagnetic relay and making its fixation more secure. The slot 141 accommodates the position of the contact rod 133. The upper part of the slot 141 is rectangular, and the width gradually increases at the bottom, making the slot 141 narrower at the top and wider at the bottom. It should be noted that a process notch 147 can be provided on the left and right sides of the top of the slot 141 based on process requirements. The process notch 147 is only provided to accommodate the bending process of the moving spring lead-out piece 140 and should not be considered as an actual influence or change on the shape and size of the slot 141. The width of the rectangular slot at the top of the slot 141 is smaller than the diameter of the contact cap 132 on the moving spring piece 130 and larger than the diameter of the contact rod 133 on the moving spring piece 130 after riveting.

[0052] The two side arms 142 are arranged to be inclined to left and right respectively at the lower part of the slot 141 where the width of the slot 141 gradually widens. The inclination of the two side arms 142 is sufficient to make a part of the two side arms 142 just placed at the dynamic spring slot 134 of the dynamic spring sheet 130 without contacting the dynamic spring sheet 130, which makes the overlapping area between the two side arms 142 and the dynamic spring sheet 130 smaller, i.e. the two side arms 142 and the dynamic spring sheet 130 have a larger staggered space. Moreover, the slot width at the two side arms 142 of the present embodiment gradually increases from top to bottom, which has a larger slot space compared with the vertical arrangement of the two side arms 142. During the use of the electromagnetic relay, there is a certain probability of high temperature at the dynamic contact 131. In the moment of turning on or off the electromagnetic relay, the high temperature can cause splashes to splash out from the dynamic contact 131. Normally, the splashes fall in the height direction. Since the two side arms 142 of the dynamic spring leading-out sheet 140 and the dynamic spring sheet 130 have a larger staggered space and the dynamic spring leading-out sheet 140 has a larger slot space, if the splashes are stuck at the higher part of the joint between the dynamic spring sheet 130 and the dynamic spring leading-out sheet 140, the splashes falling down after the next action will be at the staggered position between the two side arms 142 and the dynamic spring sheet 130 or the slot position of the dynamic spring leading-out sheet 140, so as to make the splashes slide out to the base 300. The arrangement of the present embodiment can minimize the accumulation of splashes between the dynamic spring sheet 130 and the dynamic spring leading-out sheet 140 during use.

[0053] Although the present application has been specifically shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application as defined in the appended claims.

Claims

1. A matching structure of a moving reed and a moving reed lead-out piece, the moving reed and the moving reed lead-out piece being electrically connected, the moving reed being deformable by a driving force, characterized by: The moving spring leaf includes a moving spring main arm provided with a moving contact and a moving spring pushing arm connected with the moving spring main arm, the moving spring leaf is configured to drive the moving spring main arm to move towards the stationary contact by driving force acting on the moving spring pushing arm, wherein the moving spring pushing arm is pre-bent towards a direction opposite to the driving force direction; the moving spring lead-out leaf is provided with a limiting part capable of abutting against the moving spring pushing arm, so that the limiting part can limit the deformation of the moving spring pushing arm caused by the pre-bending; the moving spring main arm and the moving spring pushing arm are isolated by a moving spring slot formed on the moving spring leaf.

2. The mating structure of claim 1, wherein: The limiting part is a protruding part provided on the two side edges of the moving spring lead-out leaf, the pre-bent moving spring pushing arm abuts against the moving spring lead-out leaf through the protruding part and generates a pre-pressure.

3. The mating structure of claim 1, wherein: The limiting part is a widened part formed by widening the two side edges of the moving spring lead-out leaf, the pre-bent moving spring pushing arm abuts against the moving spring lead-out leaf through the widened part and generates a pre-pressure.

4. The mating structure of claim 1, wherein: The limiting part is a raised part formed by raising the base of the moving spring lead-out leaf, the pre-bent moving spring pushing arm abuts against the moving spring lead-out leaf through the raised part and generates a pre-pressure.

5. The mating structure of any one of claims 2-4, wherein: The moving spring lead-out leaf is provided with a slot in the middle, the moving contact includes a contact cap and a contact rod, and the moving contact is riveted to the moving spring leaf through the contact rod; the slot gives way to the position of the contact rod, the slot is narrow at the top and wide at the bottom, the lower part of the slot is a width gradient part, the upper part of the slot is a rectangular part, and the width gradient part is connected with the rectangular part.

6. The mating structure of claim 1, wherein: The pre-bending degree is such that when the moving spring pushing arm is deformed to be flush with the moving spring main arm under the action of the driving force, the moving spring main arm is driven to move towards the stationary contact.

7. The mating structure of claim 1, wherein: Two moving spring slots are formed on the two sides of the moving spring leaf to form two moving spring pushing arms, and the moving spring main arm is between the two moving spring pushing arms.

8. An electromagnetic relay, characterized by The electromagnetic relay includes the matching structure of the moving spring leaf and the moving spring lead-out leaf according to any one of claims 1-7, a stationary contact and a pushing mechanism, and the pushing mechanism acts on the moving spring pushing arm.

9. The electromagnetic relay according to claim 8, characterized in that the pushing mechanism and the moving spring pushing arm have an idle stroke therebetween.

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