CN209805645U

CN209805645U - Exciter and electronic product

Info

Publication number: CN209805645U
Application number: CN201920958506.1U
Authority: CN
Inventors: 朱跃光; 毛东升; 史德璋
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2019-12-17
Anticipated expiration: 2029-06-24

Abstract

The utility model discloses an exciter and an electronic product, wherein the exciter comprises a shell and a coil, the coil is fixedly arranged in the shell, and the middle part of the coil is provided with a first through hole; the vibrator component is movably arranged in the shell and comprises a first magnet and a second magnet, the homopolar poles of the first magnet and the second magnet are oppositely arranged, a first washer is connected between the first magnet and the second magnet, the first magnet and the second magnet are positioned in the first through hole and are matched with the coil to generate vibration, and the magnetic pole directions of the first magnet and the second magnet are parallel to the vibration direction; the vibrator assembly further includes a vibration plate connected with the first magnet, the vibration plate configured for connection with an external device.

Description

Exciter and electronic product

Technical Field

The utility model discloses electronic product technical field specifically relates to an exciter and electronic product.

background

sound generators are important electroacoustic transducer elements in electronic products for converting current signals into sound. Along with the rapid development of electronic products in recent years, sound generating devices applied to the electronic products have been improved correspondingly.

A conventional sound generating device for a mobile phone handset is a Receiver (Receiver), which adopts the principle that a vibrating diaphragm pushes air to vibrate and generate sound. In recent years, as a full screen becomes a main development direction of a mobile phone, how to realize a receiver function under a screen non-opening design and have better listening experience is a current technical problem. In this regard, those skilled in the art have developed a technical solution for sounding by using screen vibration.

Electromagnetic actuators for driving screen sounds are generally classified into resonant type actuators and direct drive type actuators. The direct-drive exciter can directly drive the screen to vibrate and sound, and compared with the resonant exciter, the vibration mode of the direct-drive exciter can reduce energy loss in the vibration process. The direct-drive exciter can be divided into an integrated exciter and a split exciter, the split direct-drive exciter has certain complete machine assembly difficulty, and meanwhile, due to the problem of complete machine assembly precision, a smaller magnetic gap cannot be obtained, and the utilization efficiency of a magnetic field cannot be improved to the maximum extent.

In view of the above, a new technical solution is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a new technical solution for an exciter and an electronic product.

According to a first aspect of the present invention, there is provided an exciter, comprising:

The coil is fixedly arranged in the shell, and a first through hole is formed in the middle of the coil;

the vibrator component is movably arranged in the shell and comprises a first magnet and a second magnet, the same poles of the first magnet and the second magnet are oppositely arranged, a first washer is connected between the first magnet and the second magnet, the first magnet and the second magnet are positioned in the first through hole and are matched with the coil to generate vibration, and the magnetic pole directions of the first magnet and the second magnet are parallel to the vibration direction;

The vibrator assembly further includes a vibration plate connected with the first magnet, the vibration plate configured for connection with an external device.

Optionally, the housing includes a first housing and a second housing, the first housing is a cylindrical structure with openings at two ends, the second housing is fixedly connected to the opening at one end of the first housing, and the vibrating plate is exposed from the opening at the other end of the first housing.

Optionally, the vibrator assembly further includes a first elastic sheet, the first elastic sheet is disposed between one side of the first magnet, which is far away from the first washer, and the vibrating plate, and an edge of the first elastic sheet is connected to an opening at the other end of the first housing.

Optionally, the vibrator assembly further includes a first blocking piece, the first elastic piece is located on one side, far away from the first washer, of the first magnet, and the first blocking piece is arranged between the first magnet and the first elastic piece.

optionally, a second through hole is opened in the middle of the second housing, and the second through hole is configured to provide a vibration space for the vibrator assembly.

Optionally, the vibrator assembly further includes a second elastic sheet, the second elastic sheet is disposed on one side of the second magnet, which is far away from the first washer, and an edge of the second elastic sheet is connected to the second housing.

Optionally, the vibrator assembly further comprises a second washer, and the second washer is disposed between the second magnet and the second elastic sheet.

optionally, the vibrator assembly further includes a second blocking piece, the second blocking piece is connected to the second elastic piece, and the second blocking piece is located on one side, away from the second washer, of the second elastic piece.

Optionally, the device further comprises an FPC disposed within the housing and electrically connected to the coil.

According to the utility model discloses an on the other hand provides an electronic product, include:

an actuator as described above;

A fixed portion connected with a housing of the exciter;

A vibrating portion configured to be vibratable with respect to the fixing portion, the vibrating portion being connected to a vibrating plate of an exciter.

The utility model directly connects the vibrator component of the exciter with the part of the electronic product for vibration, directly drives the electronic product to vibrate and sound, and effectively improves the vibration conversion efficiency; and a pair of magnets with the same poles arranged oppositely are arranged in the vibrator component, the magnetic induction lines of the magnets are distributed densely, the magnetic field can be efficiently utilized, the magnetic leakage is low, the response is fast, and the utilization rate of the inner space of the shell of the exciter is improved to the maximum extent.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is an exploded schematic view of an exciter according to the present invention;

Fig. 2 is a schematic cross-sectional structural diagram of an exciter according to the present invention.

Fig. 3 is a schematic structural diagram of an electronic product provided by the present invention;

Detailed Description

various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

the following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The embodiment of the utility model provides an exciter, this exciter is used in electronic product for drive electronic product's at least part is relative to the fixed part vibration sound production, for example, be used for driving electronic product's screen 2 and/or with the relative back lid 3 vibration sound production that sets up of screen 2, use screen 2 to describe in detail below as an example. The fixed part may be a fixed component in an electronic product to which the actuator is applied, or may be a fixed part separately disposed.

Referring to fig. 1 and 2, the exciter includes a housing and a coil 101, wherein the coil 101 is fixedly disposed in the housing, and a first through hole is formed in the middle of the coil 101; the coil 101 is wound by a wire in one direction to form a closed annular structure, a wiring area of the coil 101 is arranged around a middle through hole of the coil 101, the wiring area refers to an area through which a lead wire in the coil 101 actually passes, and the whole wiring area is annular. The exciter 1 further comprises a vibrator assembly movably arranged in the housing, the vibrator assembly comprises a first magnet 102 and a second magnet 103, the same poles of the first magnet 102 and the second magnet 103 are oppositely arranged, a first washer 104 is connected between the first magnet 102 and the second magnet 103, for example, the N pole of the first magnet 102 is connected with the first washer 104, and the N pole of the second magnet 103 is also connected with the first washer 104; or, the south pole of the first magnet 102 is connected to the first washer 104, and the south pole of the second magnet 103 is also connected to the first washer 104. The first magnet 102 and the second magnet 103 are positioned in the first through hole, and a gap is formed between the first magnet 102 and the inner wall of the first through hole, the first magnet 102 and the second magnet 103 are matched with the coil to generate vibration, and the gap is a vibration gap of the vibrator component relative to the coil; the magnetic pole directions of the first magnet 102 and the second magnet 103 are parallel to the vibration direction; the vibrator assembly further includes a vibration plate 105 connected to the first magnet 102, the vibration plate 105 is configured to be connected to a portion of an electronic product for vibration, such as a screen, a rear cover, and the like, and the following embodiments are described taking the screen as an example.

the utility model discloses in the exciter, owing to set up a pair of magnet (first magnet 102 and second magnet 103), and the homopolar relation that sets up for relative of first magnet 102 and second magnet 103, consequently can make the line of magnetic induction pass the coil perpendicularly when outwards launching, and the line of magnetic induction distributes comparatively densely, consequently it can make magnetic field obtain the efficient utilization, and the magnetic leakage is low, the response is fast, furthest promotes the utilization ratio of exciter casing inner space.

In one embodiment, the housing includes a first housing 106 and a second housing 107, the first housing 106 is a cylindrical structure with an upper opening and a lower opening, and a vibration plate 105 and the second housing 107 are respectively covered on the upper opening and the lower opening of the first housing 106, wherein the second housing 107 is fixedly connected (e.g., welded or glued) to the opening at the lower end of the first housing 106, the vibration plate 105 is located at the upper opening of the first housing 106 and is not in contact connection with the first housing 106, and the vibration plate 105 is exposed from the opening at the upper end of the first housing 106. The outer surface of the diaphragm 105 is connected to the inner side of the screen of the electronic product, the inner surface of the diaphragm 105 is connected to the vibrator assembly, and the second housing 107 is connected to the fixing portion of the electronic product. In one embodiment, the coil 101 may be fixedly connected directly to the second housing 107, for example by an adhesive connection; in other embodiments, the coil 101 may also be fixedly connected with the inner side wall of the first casing 106, for example, by gluing, and since the first casing 106 is fixedly connected with the second casing 107, in this embodiment, it can be regarded as that the coil 101 is indirectly fixedly connected with the second casing 107. To sum up, the utility model discloses an exciter, coil 101 set up in the fixed part department of electronic product, and the vibrator subassembly sets up in the screen department of electronic product, because the electric current signal that lets in the coil 101 is the signal of alternation, and the direction of consequently produced ampere force is also reversal change in turn, and reversal change in turn's ampere force can directly transmit to the screen through the vibrator subassembly on. That is to say, the vibrator component can directly drive the screen to vibrate after receiving ampere force. The ampere force can enable the screen and the fixed part to generate relative displacement, and further enable the screen to vibrate and generate sound relative to the fixed part. The coil 101 and the vibrator component are respectively and directly arranged on the fixing part and the screen, and directly drive the screen, so that the efficient vibration transmission efficiency is ensured. The direct driving method of directly connecting the portion (for example, screen) for vibration of the electronic product with the vibrator assembly simplifies the principle of driving the screen to vibrate, the screen can directly generate vibration after being subjected to ampere force, and the design method effectively improves the vibration conversion efficiency. In addition, because the coil 101 generates a large amount of heat after current is introduced, the coil 101 is not connected with the screen, so that the screen is prevented from being damaged due to heat generated by the coil 101; the outer surface of the vibrating plate 105 directly connected to the screen does not generate heat, and therefore, the screen is driven to vibrate and heat is not transferred to the screen.

The vibrator assembly further comprises a first elastic sheet 108, the first elastic sheet 108 is arranged between one side of the first magnet 102, which is far away from the first washer 104, and the vibrating plate, and the edge of the first elastic sheet 108 is connected to an opening at the upper end of the first shell 106. The first elastic sheet 108 can provide a buffering effect between the housing and the vibrator component, and also can provide a restoring action force for the reset of the screen of the electronic product after vibration, so that the risks of damage to the screen and incorrect reset of the screen are reduced. The first elastic sheet 108 can generate damping and buffering effects to buffer the impact force on the screen, so that the screen is prevented from being damaged by the frequently changed ampere force. Moreover, under the condition that the screen is made of a soft material with good deformability and relatively poor elastic recovery capability, the first elastic sheet 108 can provide a return acting force for the screen, so that the screen returns to an initial balance position after finishing a vibration action each time. In this way, the lifetime of the screen can be increased, as well as the acoustic performance of the exciter.

In one embodiment, the vibrator assembly further includes a first blocking piece 109, the first resilient piece 108 is located on a side of the first magnet 102 far away from the first washer 104, and the first blocking piece 109 is disposed between the first magnet 102 and the first resilient piece 108. The first blocking piece 109 plays a role in switching and magnetic conduction between the first magnet 102 and the first elastic piece 108, and because the surface of the elastic piece is not a flat structure and is provided with a plurality of hollowed parts or even uneven structures, the blocking piece with a flat surface is arranged between the elastic piece and the magnet, so that the connection between the first magnet 102 and the first elastic piece 108 is smoother.

In one embodiment, the second housing 107 has a second through hole formed in a middle portion thereof, and the second through hole is configured to provide a vibration space for the vibrator assembly, so that the vibration space of the vibrator assembly is ensured without making the housing large to reserve the vibration space for the vibrator assembly.

In one embodiment, the vibrator assembly further includes a second resilient piece 110, the second resilient piece 110 is disposed on a side of the second magnet 103 away from the first washer 104, and an edge of the second resilient piece 110 is connected to the second housing 107. In one embodiment, the vibrator assembly further comprises a second washer 111, and the second washer 111 is disposed between the second magnet 103 and the second resilient piece 110. The second resilient piece 110 also provides a restoring force for the vibration of the vibrator assembly.

The first washer 104 is attached to the first magnet 102 and the second magnet 103, and the second washer 111 is attached to the second magnet 103, so that the magnetic fields generated by the first magnet 102 and the second magnet 103 are converged and concentrated, and the magnetic lines of force generated by the first magnet 102 and the second magnet 103 are corrected, thereby improving the magnetic field strength and improving the magnetic force generated between the first magnet 102 and the second magnet 103.

In one embodiment, the vibrator assembly further includes a second blocking piece 112, the second blocking piece 112 is connected to the second resilient piece 110, and the second blocking piece 112 is located on a side of the second resilient piece 110 away from the second washer 111, that is, at a position of the second through hole.

In one embodiment, the actuator further includes an FPC113 (flexible circuit board), the FPC113 being disposed within the housing and electrically connected to the coil 101, specifically, the FPC113 may be disposed at an inner surface of the second housing 107; the FPC113 is used to transmit an electrical signal so that the first and second magnets 102 and 103 can form a magnetic force.

Referring to fig. 3, an embodiment of the present invention further provides an electronic product, which includes the exciter 1 as described above, and further includes a product main body, where the product main body is divided into a fixed portion and a vibrating portion, and the fixed portion is connected to a housing of the exciter 1; the vibrating portion is configured to be capable of vibrating with respect to the fixing portion, and the vibrating portion is connected to a vibrating plate of the actuator 1. The vibrating portion is a screen 2 for vibrating and sounding of the electronic product and/or a rear cover 3 (the screen 2 is taken as an example for explanation below) disposed opposite to the screen 2, and the fixing portion is a part of the structure of the product main body, and in one embodiment, the fixing portion may be a middle frame, a side wall, or the like in the product main body. In order to mount other electronic devices in the product body, the product body is often configured with a partition, a middle frame and other structural components, which have good structural stability in the electronic product, and are used for mounting the electronic devices on one hand and protecting the electronic devices on the other hand. Therefore, by using such a structure member in the product body as the fixing portion, the conversion rate of the ampere force into the vibration can be increased, and the vibration reliability can be improved. The inner surface of the side wall of the product body may also serve as the fixing portion.

The actuator 1 is arranged in the product body. The electronic product can be a mobile phone or a tablet computer and the like, and the utility model discloses do not restrict this. The screen 2 is provided on the product main body and serves as a display screen of an electronic product. The screen 2 can be connected to the product body in a mode that one end is rotatable, and the other end can be freely moved; alternatively, it is also possible to make the screen 2 of a material having good elastic deformability, the screen 2 being arranged in such a way that one end is fixedly connected to the other fixed part and the other end is freely movable, so that the screen 2 can vibrate with respect to the body of the product. The coil 101 is fixedly arranged on a part of the product main body, which is equivalent to the fixing part, and the vibrator component is fixedly arranged on the screen 2, and the screen 2 can be driven to vibrate and sound through the magnetic force generated by the vibrator component. The utility model provides an electronic product is because of having adopted the utility model provides an exciter, consequently the space that occupies on the thickness direction that is on a parallel with the screen of electronic product still less, more be favorable to the thinness of electronic product design, satisfy the frivolous design demand of electronic product. On the other hand, the design mode of directly driving the screen to vibrate is adopted, so that the processing and assembling processes of the product are simplified, and the cost is reduced.

Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. An actuator, comprising:

A housing;

2. The actuator according to claim 1, wherein the case includes a first case and a second case, the first case has a cylindrical structure with both ends open, the second case is fixedly connected to an opening at one end of the first case, and the diaphragm is exposed from an opening at the other end of the first case.

3. the exciter according to claim 2, wherein the vibrator assembly further comprises a first resilient piece, the first resilient piece is disposed between the vibrating plate and a side of the first magnet far from the first washer, and an edge of the first resilient piece is connected to the opening at the other end of the first housing.

4. the exciter of claim 3, wherein the vibrator assembly further comprises a first stop tab, the first spring tab is located on a side of the first magnet away from the first washer, and the first stop tab is disposed between the first magnet and the first spring tab.

5. The exciter according to claim 2, wherein the second housing has a second through hole formed in a middle portion thereof, the second through hole being configured to provide a vibration space for the vibrator assembly.

6. The exciter of claim 5, wherein the vibrator assembly further comprises a second resilient tab disposed on a side of the second magnet distal from the first washer, an edge of the second resilient tab being connected to the second housing.

7. The exciter of claim 6, wherein the vibrator assembly further comprises a second washer disposed between the second magnet and the second spring plate.

8. The exciter of claim 7, wherein the vibrator assembly further comprises a second catch connected to the second spring plate, the second catch being located on a side of the second spring plate away from the second washer.

9. An actuator according to any of claims 1-8, further comprising an FPC disposed within the housing and electrically connected to the coil.

10. An electronic product, comprising:

An actuator of any one of claims 1-9;

A fixed portion connected with a housing of the exciter;