An electromagnet latch device with a simple buffer end structure

Abstract

The invention discloses an electromagnet latch device with a simple buffer end structure, including a rod body, an exterior cover, an end cap 1, a limiting screw block, an end cap 2, a sealing ring, an insulating sleeve, a strip guide hole, a permanent magnet, a stop guide rod, an iron block, a permanent magnet mounting frame, a buffer gasket, a buffer contact convex end and an electromagnetic coil. The invention is beneficial in that: the buffer contact convex end provided by the buffer gasket enhances the elastic buffer strength, reduces the impact strength of the end of the moving structure on the end of the fixed structure, and achieves a low noise and durable effect, and the buffer gasket occupies a small space for installation, replaces the use of springs, and solves the problem that the spring structure occupies a large space for installation and has a large abnormal sound during long-term expansion and contraction; the iron block at the outer end of the stop guide rod is magnetically attracted to the adjacent permanent magnet, and the problem that the force effect between the permanent magnet and the electromagnetic coil on the rod body fails after a sudden power failure, and there is a loose movement and separation from the action structure part is solved.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnet application, in particular to an electromagnet latch device with a simple buffer end structure. Background Art

[0002] Electromagnetic latch devices are widely used in the fields of automatic smart door locks. In the long-term use of existing electromagnet latch devices, there is a situation where the internal moving structure collides with the end structure. Generally, a spring structure is used as an accessory to buffer the collision. However, the spring has a certain amount of expansion and contraction, and the installation takes up a large space, which is not conducive to the miniaturization of the overall structure. At the same time, the performance of the spring decreases with the increase in the frequency of use, and the looseness of the installation position easily leads to abnormal noise during the expansion and contraction process of the spring. Therefore, in order to solve the above problems, an electromagnet latch device with a simple buffer end structure is proposed. Summary of the invention

[0003] The purpose of the present invention is to provide an electromagnet latch device with a simple buffer end structure in order to solve the above problems.

[0004] The present invention achieves the above-mentioned purpose through the following technical scheme: an electromagnet latch device with a simple buffer end structure, comprising a rod body, an insulating sleeve, a permanent magnet and an electromagnetic coil located in the insulating sleeve, the rod body part located in the insulating sleeve is fixedly connected to the middle of the electromagnetic coil, and two permanent magnet mounting frames symmetrically located in the middle of the insulating sleeve are both installed with permanent magnets, buffer gaskets are installed in the ports at both ends of the insulating sleeve, and buffer contact convex ends are distributed around the hole structure in the middle of the buffer gasket, the two ends of the electromagnetic coil are respectively contacted with the corresponding two buffer contact convex ends by moving, and the electromagnetic coil is composed of a plurality of equal independent coil parts;

[0005] The buffer contact convex end portion is formed by a separation gap distributed around the hole structure located in the middle of the buffer gasket, and the angle between the flat portion and the inclined portion of the buffer contact convex end is 120°. The stop guide rod portion located on the inner side of both ends of the electromagnetic coil is in sliding contact with the inner wall of the strip guide hole, and an iron block is installed on the outer end side wall of the stop guide rod.

[0006] Preferably, two strip-shaped guide holes are provided, and the two strip-shaped guide holes are symmetrically opened on the surface of the insulating sleeve.

[0007] Preferably, the shape and specification of the permanent magnet mounting frame match the shape and specification of the permanent magnet.

[0008] Preferably, the two end portions of the insulating sleeve are respectively provided with an end cover 1 and an end cover 2, and the end cover 1 and the end cover 2 are respectively installed in the two end ports of the exterior cover.

[0009] Preferably, the shape of the exterior cover is not limited to a circular tube shape, and the matching shape of the exterior cover depends on the shape formed by the combination of the insulating sleeve and the permanent magnet mounting frame.

[0010] Preferably, the inner side surface of end cover one and the inner side surface of end cover two are respectively in contact with the edge of one side of the corresponding buffer gasket, and sealing rings are installed in the hole at the end of end cover one and the hole in the middle of end cover two.

[0011] Preferably, the inner ring wall of the sealing ring is in sliding sealing contact with a corresponding portion of the rod body.

[0012] Preferably, a limiting screw block is threadedly installed at one end of the rod body.

[0013] The beneficial effects of the present invention are:

[0014] The buffer contact convex end portion is provided by the buffer gasket, and the angle between the plane portion and the inclined portion of each buffer contact convex end portion is 120°, so as to enhance the elastic buffer strength, reduce the impact strength of the mobile structure end portion on the fixed structure end portion, and achieve the effect of low noise and durability. In addition, the buffer gasket occupies a small space when installed, replacing the use of the spring, and solving the problem that the spring structure occupies a large space when installed and has a large abnormal sound when it is stretched and retracted for a long time.

[0015] The outer end of one stop guide rod is close to the permanent magnet, and the outer end of the other stop guide rod is far away from the permanent magnet, and the iron block at the outer end of the stop guide rod is magnetically attracted to the adjacent permanent magnet, so as to play the role of secondary positioning and fixing of the rod body after the movement, and solve the problem that the force effect between the permanent magnet and the electromagnetic coil on the rod body fails after a sudden power failure, and there is a problem of looseness and movement and separation from the action structure part;

[0016] By means of a stop guide rod made of insulating material, which is fixedly connected to the corresponding end of the electromagnetic coil and partially slides in the strip guide hole, the free rotation of the rod body connected to the electromagnetic coil is effectively restricted, thereby preventing radial friction between the rod body and the sealing ring and ensuring the effectiveness of the sealing of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0019] Figure 2It is a partial schematic diagram of the overall internal structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the distribution connection structure of the rod body, the permanent magnet and the electromagnetic coil of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the buffer gasket of the present invention;

[0022] Figure 5 This is a schematic diagram of the connection structure between the insulating sleeve and the permanent magnet of the present invention;

[0023] Figure 6 It is a front view of the connecting structure of the rod body and the electromagnetic coil of the present invention.

[0024] In the figure: 1. rod body; 2. exterior cover; 3. end cover 1; 4. limiting screw block; 5. end cover 2; 6. sealing ring; 7. insulating sleeve; 701. strip guide hole; 8. permanent magnet; 9. stop guide rod; 10. iron block; 11. permanent magnet mounting frame; 12. buffer gasket; 1201. buffer contact convex end; 13. electromagnetic coil. DETAILED DESCRIPTION

[0025] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0026] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0027] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] See also Figure 1-6As shown, an electromagnet latch device with a simple buffer end structure comprises a rod body 1, an insulating sleeve 7, a permanent magnet 8 and an electromagnetic coil 13 located in the insulating sleeve 7, the rod body 1 part located in the insulating sleeve 7 is fixedly connected with the middle part of the electromagnetic coil 13, and two permanent magnet mounting frames 11 symmetrically located in the middle part of the insulating sleeve 7 are both equipped with permanent magnets 8, and the electromagnetic coil 13 is composed of a plurality of equal independent coil parts;

[0029] Combination Figure 3 As shown, the two sides of the permanent magnet 8 are N poles and S poles respectively. The electromagnetic coil 13 forms the N pole and S pole relative to the permanent magnet 8 by changing the direction of the current. In this way, the rod body 1 connected to the electromagnetic coil 13 is pushed and pulled by utilizing the principle that like poles repel each other and unlike poles attract each other, thereby having the structural function of plugging and pulling the corresponding outer end of the rod body 1.

[0030] Combination Figure 3 and Figure 4 As shown, buffer gaskets 12 are installed in the ports at both ends of the insulating sleeve 7, and buffer contact convex ends 1201 are distributed around the hole structure in the middle of the buffer gasket 12, and the two ends of the electromagnetic coil 13 are respectively in contact with the corresponding two buffer contact convex ends 1201 by moving;

[0031] The buffer contact convex end portion 1201 is formed by a separation gap distributed around the hole structure located in the middle of the buffer gasket 12, and the angle between the flat portion and the inclined portion of the buffer contact convex end is 120°;

[0032] Among them, the material of the buffer gasket 12 is not limited to one elastic structural material. The buffer contact convex end 1201 set by the buffer gasket 12 and the angle between the plane part and the inclined part of each buffer contact convex end 1201 is 120°, which enhances the elastic buffer strength and reduces the impact strength of the mobile structure end on the fixed structure end, achieving a low noise and durable effect. The buffer gasket 12 occupies a small space when installed, replacing the use of a spring, solving the problem that the spring structure occupies a large space when installed and has a large abnormal noise due to long-term expansion and contraction.

[0033] Combination Figure 2 , Figure 3 and Figure 5 As shown, the stop guide rod 9 located on the inner side of both ends of the electromagnetic coil 13 is in sliding contact with the inner wall of the strip guide hole 701, and the outer end side wall of the stop guide rod 9 is installed with an iron block 10, and the inner side surface of the end cover 1 3 and the inner side surface of the end cover 2 5 are respectively in contact with the edge of one side of the corresponding buffer gasket 12, and the hole at the end of the end cover 1 3 and the hole in the middle of the end cover 2 5 are both installed with a sealing ring 6, and the inner ring wall of the sealing ring 6 is in sliding sealing contact with the corresponding part of the rod body 1;

[0034] By means of the stop guide rod 9 made of insulating material being fixedly connected to the end corresponding to the electromagnetic coil 13, and the stop guide rod 9 partially slidingly located in the strip guide hole 701, the free rotation of the rod body 1 connected to the electromagnetic coil 13 is effectively restricted, thereby preventing radial friction between the rod body 1 and the sealing ring 6, and ensuring the effectiveness of the sealing of the sealing ring 6;

[0035] Under the driving action of the electromagnetic coil 13, the outer end of one stop guide rod 9 is close to the permanent magnet 8, and the outer end of the other stop guide rod 9 is far away from the permanent magnet 8, and the iron block 10 at the outer end of the stop guide rod 9 is magnetically attracted to the adjacent permanent magnet 8. Since there is a distance between the iron block 10 and the permanent magnet 8, the magnetic attraction strength between the two is much smaller than the magnetic repulsion strength of the electromagnetic coil 13 on the permanent magnet 8, which plays a role in secondary positioning and fixing the rod body 1 after movement, and solves the problem of the force effect between the permanent magnet 8 and the electromagnetic coil 13 on the rod body 1 failing after a sudden power outage, resulting in looseness and movement of the structural parts.

[0036] There are two strip-shaped guide holes 701 , and the two strip-shaped guide holes 701 are symmetrically opened on the surface of the insulating sleeve 7 .

[0037] The shape specifications of the permanent magnet mounting frame 11 match the shape specifications of the permanent magnet 8. The shape of the exterior cover 2 is not limited to a circular tube shape, and the matching shape of the exterior cover 2 depends on the shape formed by the combination of the insulating sleeve 7 and the permanent magnet mounting frame 11, so as to meet the market product usage requirements of different structural shapes.

[0038] like Figure 2 As shown, the two ends of the insulating sleeve 7 are respectively provided with an end cover 1 3 and an end cover 2 5, and the end cover 1 3 and the end cover 2 5 are respectively installed in the two end ports of the exterior cover 2, the inner side surface of the end cover 1 3 and the inner side surface of the end cover 2 5 are respectively in contact with the edge of one side of the corresponding buffer gasket 12, and a sealing ring 6 is installed in the hole at the end of the end cover 1 3 and the hole in the middle of the end cover 2 5, and the inner ring wall of the sealing ring 6 is in sliding sealing contact with the corresponding part of the rod body 1, which is conducive to forming a protective structure.

[0039] like Figure 3 As shown, a limiting screw block 4 is threadedly installed at one end of the rod body 1 to limit the movement of one end of the rod body 1.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0041] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electromagnet latch device with a simple buffer end structure, characterized in that: The invention comprises a rod body (1), an insulating sleeve (7), a permanent magnet (8) and an electromagnetic coil (13) located in the insulating sleeve (7), wherein the rod body (1) part located in the insulating sleeve (7) is fixedly connected to the middle part of the electromagnetic coil (13), and two permanent magnet mounting frames (11) symmetrically located in the middle part of the insulating sleeve (7) are both installed with permanent magnets (8), and buffer gaskets (12) are installed in the ports at both ends of the insulating sleeve (7), and buffer contact convex end portions (1201) are distributed around the hole structure in the middle part of the buffer gasket (12), and the two ends of the electromagnetic coil (13) are respectively in contact with the two corresponding buffer contact convex end portions (1201) by moving, and the electromagnetic coil (13) is composed of a plurality of equal independent coil parts; The buffer contact convex end portion (1201) is formed by a separation gap distributed around the hole structure located in the middle of the buffer gasket (12), and the angle between the flat portion and the inclined portion of the buffer contact convex end is 120°. The stop guide rod (9) portions located on the inner sides of both ends of the electromagnetic coil (13) are in sliding contact with the inner wall of the strip guide hole (701), and an iron block (10) is installed on the outer end side wall of the stop guide rod (9); The two side surfaces of the permanent magnet (8) are respectively an N pole and an S pole, and the electromagnetic coil (13) forms an N pole and an S pole relative to the permanent magnet (8) by changing the direction of the energized current, thereby achieving push-pull movement of the rod body (1) connected to the electromagnetic coil (13).

2. The electromagnet latch device with a simple buffer end structure according to claim 1, characterized in that: Two strip-shaped guide holes (701) are provided, and the two strip-shaped guide holes (701) are symmetrically opened on the surface of the insulating sleeve (7).

3. The electromagnet latch device with a simple buffer end structure according to claim 1, characterized in that: The shape and specifications of the permanent magnet mounting frame (11) match those of the permanent magnet (8).

4. The electromagnet latch device with a simple buffer end structure according to claim 1, characterized in that: The insulating sleeve (7) is provided with an end cover 1 (3) and an end cover 2 (5) at both ends, respectively, and the end cover 1 (3) and the end cover 2 (5) are respectively installed in the ports at both ends of the exterior cover (2).

5. The electromagnet latch device with a simple buffer end structure according to claim 4, characterized in that: The shape of the exterior cover (2) is not limited to a circular tube shape, and the matching shape of the exterior cover (2) depends on the shape formed by the combination of the insulating sleeve (7) and the permanent magnet mounting frame (11).

6. The electromagnet latch device with a simple buffer end structure according to claim 5, characterized in that: The inner side surface of the end cover 1 (3) and the inner side surface of the end cover 2 (5) are respectively in contact with the edge of one side of the corresponding buffer gasket (12), and a sealing ring (6) is installed in the hole at the end of the end cover 1 (3) and the hole in the middle of the end cover 2 (5).

7. The electromagnet latch device with a simple buffer end structure according to claim 6, characterized in that: The inner ring wall of the sealing ring (6) is in sliding sealing contact with a corresponding portion of the rod body (1).

8. The electromagnet latch device with a simple buffer end structure according to claim 1, characterized in that: A limiting screw block (4) is threadedly mounted on one end of the rod body (1).

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