CN203632857U - Electromagnetic driving device - Google Patents

Abstract

The utility model discloses an electromagnetic driving device. The electromagnetic driving device comprises a casing and an electromagnetic driving device main body placed in the casing. The casing includes a bottom wall, a plurality of side walls extending from the bottom wall, and a The receiving space surrounded by the wall and some of the side walls and the opening opposite to the bottom wall surrounded by the several of the side walls; A gap is left between the inner surfaces of the walls. The utility model provides users with an electromagnetic drive device that can greatly reduce the difficulty of assembling the complete machine.

Description

Electromagnetic drive device

technical field

The utility model relates to the field of screen sound generation, in particular to an electromagnetic driving device for driving screen sound generation.

Background technique

In the related art, an electromagnetic driving device for driving a screen to produce sound generally includes a magnetic circuit system, an elastic frame for holding the magnetic circuit system, and a vibrating plate arranged above the magnetic circuit system and connected to the elastic frame. The magnetic circuit system includes a lower splint, a cylinder protruding from the lower splint, first and second magnets symmetrically arranged on both sides of the cylinder and connected to the lower splint, and sleeved coils on the cylinder. In practical applications, the vibrating plate is attached to the screen, and the magnetic circuit system drives the vibrating plate to vibrate, thereby driving the screen to emit sound.

When the electromagnetic drive device drives the screen to make sound, the electromagnetic drive device will vibrate with the screen, which has certain requirements for the installation of the electromagnetic drive device. A distance should be reserved around the electromagnetic drive device so that the electromagnetic drive device will not touch any other devices. , Otherwise, the vibration of the electromagnetic drive device will affect the performance of other devices, and there will be noise, which in turn will affect the performance of the system. Moreover, the electromagnetic drive device needs a certain pressure when it works, and the pressure has a great influence on the consistency of performance. Therefore, the assembly precision of the electromagnetic drive device is extremely high, which increases the difficulty of the complete machine assembly of the electromagnetic drive device.

Utility model content

In order to solve the above technical problems, the utility model provides users with an electromagnetic drive device that can greatly reduce the difficulty of assembling the whole machine.

An electromagnetic driving device, the electromagnetic driving device includes a housing and an electromagnetic driving device main body placed in the housing, the housing includes a bottom wall, a number of side walls extending from the bottom wall, a bottom wall and a number of side walls The storage space surrounded by the side walls and the opening opposite to the bottom wall surrounded by some of the side walls; There are gaps in between.

Preferably, the housing is also provided with a fixed installation structure.

Preferably, the fixed installation structure is a first protrusion and a second protrusion respectively extending from opposite sides of the bottom wall in a direction away from the receiving space, and the first protrusion and the second protrusion are Mounting holes are provided on all parts.

Preferably, the fixed installation structure is a first welding portion and a second welding portion respectively extending from two opposite sides of the bottom wall in a direction away from the receiving space.

Preferably, the fixed installation structure is a first buckle structure and a second buckle structure respectively provided on the outer surfaces of the two opposite side walls.

Preferably, the gap between the main body of the electromagnetic drive device and the inner surfaces of the several side walls is 0.35mm.

Preferably, the electromagnetic drive device further includes a buffer interposed between the main body of the electromagnetic drive device and the bottom wall.

Preferably, the main body of the electromagnetic drive device includes a magnetic circuit system, an elastic frame for holding the magnetic circuit system, and a vibrating plate arranged above the magnetic circuit system and connected to the elastic frame, and the vibrating plate is connected to the elastic frame. The opening is exposed.

Preferably, the magnetic circuit system includes a lower clamping plate, a cylinder protruding from the lower clamping plate, a first magnetic steel and a second magnetic steel symmetrically arranged on both sides of the cylinder and connected to the lower clamping plate .

Preferably, the main body of the electromagnetic driver further includes a circuit board, and the circuit board is attached on the surface of the lower splint opposite to the buffer and is closely attached to the buffer; the circuit board is set There are protrusions extending all the way to the outside of the housing, and the surface of the protrusions is provided with metal contacts

The beneficial effects of the utility model are: by adding a shell around the main body of the electromagnetic drive device, and there is a gap between the main body of the electromagnetic drive device and the inner surface of the side wall of the shell, the main body of the electromagnetic drive device will not affect other components when it is working. device. In addition, the buffer can provide a pressure to the main body of the electromagnetic drive device, so that the vibration plate and the screen of the main body of the electromagnetic drive device are fully coupled, which can not only offset the assembly error of the shell on the whole machine, but also solve the assembly gap and pressure consistency The problem greatly reduces the difficulty of assembly of the whole machine.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work, wherein:

Fig. 1 is the three-dimensional structure diagram of the first embodiment of the electromagnetic drive device disclosed by the utility model;

Fig. 2 is the A-direction view of the electromagnetic drive device shown in Fig. 1;

Fig. 3 is a sectional view of the electromagnetic drive device shown in Fig. 1;

Fig. 4 is a structural split diagram of the electromagnetic drive device shown in Fig. 1;

Fig. 5 is a schematic diagram of the three-dimensional structure of the second embodiment of the electromagnetic drive device disclosed by the utility model;

Fig. 6 is a schematic diagram of the three-dimensional structure of the third embodiment of the electromagnetic drive device disclosed by the utility model;

Fig. 7 is a three-dimensional structural diagram of a fourth embodiment of the electromagnetic driving device disclosed in the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The first embodiment:

Please refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4 at the same time, wherein Fig. 1 is a schematic diagram of the three-dimensional structure of the first embodiment of the electromagnetic driving device disclosed by the utility model, and Fig. 2 is A of the electromagnetic driving device shown in Fig. 1 Fig. 3 is a cross-sectional view of the electromagnetic drive device shown in Fig. 1, and Fig. 4 is an exploded view of the structure of the electromagnetic drive device shown in Fig. 1.

The electromagnetic driving device 1 includes a casing 11 , an electromagnetic driving device main body 12 and a buffer 13 placed in the casing 11 .

The housing 11 includes a bottom wall 111 , several side walls 112 extending from the bottom wall 111 , a receiving space 115 surrounded by the bottom wall 111 and the several side walls 112 , and an opening 113 opposite to the bottom wall 111 surrounded by the several side walls 112 . The number of sidewalls 112 can be determined according to the actual situation. In this embodiment, the number of sidewalls 112 is four, so that the opening 113 surrounded by several sidewalls 112 has a rectangular structure.

The main body 12 of the electromagnetic driving device is located in the receiving space (not marked), and there are gaps between the inner surfaces of the sidewalls 112 , so that the main body 12 of the electromagnetic driving device will not affect other components when working. Preferably, the gap between the main body 12 of the electromagnetic driving device and the inner surfaces of the side walls 112 is 0.35mm. The main body 12 of the electromagnetic driving device includes a magnetic circuit system 121 , an elastic frame 123 for holding the magnetic circuit system 121 , and a vibrating plate 122 disposed above the magnetic circuit system 121 and connected to the elastic frame 123 . The magnetic circuit system 121 includes a lower clamping plate 1211, a cylinder 1212 protruding from the lower clamping plate 1211, a first magnet 1213 and a second magnet 1214 symmetrically arranged on both sides of the cylinder 1212 and connected to the lower clamping plate 1211, and the cylinder 1212 A coil 1215 is sheathed on it. The elastic frame 123 includes holding arms 1231 respectively connected to both ends of the lower splint 1211 and two elastic long sides 1232 arranged in parallel at intervals and connected to the holding arms 1231 at both ends. The main body 1221 is located between the two elastic long sides 1232 , and the two extension parts 1222 are closely attached to the two elastic long sides 1232 respectively.

The buffer 13 is sandwiched between the magnetic circuit system 121 and the bottom wall 111, and the vibrating plate 122 is exposed from the opening 113, so that the vibrating plate 122 can directly contact the screen, and then, the buffer 13 is compressed to provide a pressure to the electromagnetic drive device body 12, so that the vibrating plate 122 of the electromagnetically driven device body 12 is fully coupled with the screen. In this implementation, the buffer 13 is foam.

In addition, the main body 12 of the electromagnetic driving device also includes a circuit board 124 located in the receiving space (not shown). The circuit board 124 is attached to the surface of the lower splint 1211 opposite to the buffer 13 and is closely attached to the buffer 13 . The circuit board 124 also has a rectangular protrusion 1241 extending to the outside of the housing 11 , and a metal contact 1242 is provided on the surface of the rectangular protrusion 1241 . In order to place the rectangular protrusion 1241 , the casing 11 forms an opening 1121 on the side wall 112 .

The housing 11 is also provided with a fixed installation structure 114. In this embodiment, the fixed installation structure 114 is a double-sided adhesive tape located on the outer surface of the bottom wall 111. At this time, the housing 11 can be fixed by the adhesive action of the double-sided adhesive tape. Installed on the complete machine housing.

The second embodiment:

Please refer to FIG. 5 , wherein FIG. 5 is a schematic perspective view of the second embodiment of the electromagnetic driving device disclosed in the present invention. The structure of the electromagnetic driving device 2 provided in this embodiment is similar to that of the electromagnetic driving device 1 provided in the above embodiment, the main difference is that in this embodiment, the fixed installation structure 214 is away from the storage space from the opposite sides of the bottom wall 211 ( The first protruding portion 2141 and the second protruding portion 2142 are formed extending in the direction of (not marked), and the first protruding portion 2141 and the second protruding portion 2142 are both provided with installation holes 2143 . At this time, the casing 21 can be fixedly installed on the whole machine casing by installing screws on the mounting holes 2143 on the first protruding portion 2141 and the second protruding portion 2142 respectively.

The third embodiment:

Please refer to FIG. 6 , wherein FIG. 6 is a schematic perspective view of the third embodiment of the electromagnetic driving device disclosed in the present invention. The structure of the electromagnetic driving device 3 provided in this embodiment is similar to that of the electromagnetic driving device 1 provided in the above embodiment, the main difference is that in this embodiment, the fixed installation structure 314 is away from the storage space from the opposite sides of the bottom wall 311 ( The first welding portion 3141 and the second welding portion 3142 are formed extending in the direction of (not marked). At this time, the first welding portion 3141 and the second welding portion 3142 can be respectively laser welded to fix the shell 31 to the casing of the complete machine.

Fourth embodiment:

Please refer to FIG. 7 , wherein FIG. 7 is a schematic three-dimensional structure diagram of a fourth embodiment of the electromagnetic driving device disclosed in the present invention. The structure of the electromagnetic driving device 4 provided in this embodiment is similar to that of the electromagnetic driving device 1 provided in the above embodiment, the main difference is that in this embodiment, the fixed mounting structures 414 are respectively arranged on the outer surfaces of the opposite side walls 412 The first buckle structure 4141 and the second buckle structure 4142 . At this time, buckle structures corresponding to the first buckle 4141 and the second buckle 4142 can be provided on the whole machine casing, and the first buckle structure 4141 and the second buckle structure 4142 are respectively connected to the whole machine shell. The buckle structures of the two cooperate with each other to fix and install the shell 41 on the casing of the whole machine.

In practical applications, the electromagnetic driving device provided in this embodiment is attached to the screen through the vibrating plate, and the magnetic circuit system drives the vibrating plate to vibrate, thereby driving the screen to emit sound.

In addition, a shell is added around the main body of the electromagnetic drive device, and a gap is left between the main body of the electromagnetic drive device and the inner surface of the side wall of the shell, so that the main body of the electromagnetic drive device will not affect other components when working.

In addition, there is a buffer between the magnetic circuit system and the bottom wall, and the buffer can provide a pressure to the main body of the electromagnetic drive device, so that the vibration plate and the screen of the main body of the electromagnetic drive device are fully coupled, not only can offset the shell assembly on the whole machine The assembly error also solves the problem of assembly gap and pressure consistency, which greatly reduces the difficulty of assembly of the whole machine.

The above descriptions are only examples of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the utility model description, or directly or indirectly used in other related technologies fields, are all included in the scope of patent protection of the utility model in the same way.

Claims (10)

1. An electromagnetic drive device, characterized in that, the electromagnetic drive device comprises a housing and an electromagnetic drive device main body placed in the housing, the housing comprises a bottom wall, some side walls extending from the bottom wall, The storage space surrounded by the bottom wall and some of the side walls and the opening opposite to the bottom wall surrounded by the some of the side walls; There are gaps between the inner surfaces of the side walls. 2. The electromagnetic drive device according to claim 1, characterized in that, the housing is further provided with a fixed installation structure. 3. The electromagnetic drive device according to claim 2, wherein the fixed installation structure is a first protruding portion and a second protrusion extending from opposite sides of the bottom wall in a direction away from the receiving space, respectively. Two protruding parts, the first protruding part and the second protruding part are provided with installation holes. 4. The electromagnetic drive device according to claim 2, wherein the fixed installation structure is a first welding portion and a second welding portion respectively extending from opposite sides of the bottom wall in a direction away from the receiving space. 2. Welding part. 5 . The electromagnetic drive device according to claim 2 , wherein the fixed installation structure is a first buckle structure and a second buckle structure respectively provided on the outer surfaces of the two opposite side walls. 6 . 6 . The electromagnetic driver according to claim 1 , wherein the gap between the main body of the electromagnetic driver and the inner surfaces of several of the side walls is 0.35 mm. 7. The electromagnetic driving device according to any one of claims 1-6, characterized in that the electromagnetic driving device further comprises a buffer interposed between the main body of the electromagnetic driving device and the bottom wall. 8. The electromagnetic drive device according to claim 7, wherein the main body of the electromagnetic drive device comprises a magnetic circuit system, an elastic frame for holding the magnetic circuit system, and an elastic frame arranged above the magnetic circuit system and in contact with the magnetic circuit system The elastic frame is connected with a vibrating plate, and the vibrating plate is exposed from the opening. 9. The electromagnetic drive device according to claim 8, wherein the magnetic circuit system comprises a lower splint, a cylinder protruding from the lower splint, symmetrically arranged on both sides of the cylinder and aligned with the The first magnetic steel and the second magnetic steel connected by the lower splint are described. 10. The electromagnetic driving device according to claim 9, wherein the main body of the electromagnetic driving member further comprises a circuit board, and the circuit board is attached on the surface of the lower splint opposite to the buffer and The buffer is tightly fitted; the circuit board is provided with a protrusion extending to the outside of the housing, and the surface of the protrusion is provided with a metal contact.

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