Key motor and electronic device

Abstract

The invention discloses a key motor and an electronic device, and the key motor comprises a hollow housing, stators fixed at the two opposite sides of the housing, a vibrator whose two ends are respectively and elastically supported at the two opposite ends of the housing, and a key fixed at the vibrator. The vibrator comprises magnetic steel and pole cores which are respectively stacked and fixed on two opposite sides of the magnetic steel; the stator comprises two iron cores which are respectively fixed on two opposite sides of the shell and coils which are wound on the iron cores; the key motor further comprises two non-metal elastic pieces which are respectively fixed at two opposite ends of the shell, and the two non-metal elastic pieces are respectively and fixedly connected with the vibrator. According to the key motor, the space occupied by the elastic piece after installation can be reduced through a non-metal elastic design mode and a design mode that the key motor and the non-metal elastic piece are integrally formed, so that the magnetic circuit size of the key motor is increased as much as possible under the condition that the key motor is of the same size structure, and the driving force of the key motor is sufficient.

Description

Technical Field

[0001] The present invention relates to the technical field of keypads, and in particular to a keypad motor and an electronic device. Background Art

[0002] A touch button is a button that realizes touch control by sensing a pressing signal. Specifically, it accurately detects the pressing position and the pressing force to achieve precise control.

[0003] The touch button mainly includes a housing, a motor fixed in the housing, and a button fixed to the motor. The motor is mainly composed of a stator and a vibrator, wherein the vibrator is elastically supported on the housing and spaced apart from the stator. The working principle of the touch button is that when the button is pressed, the vibrator will move in the pressing direction, so as to achieve corresponding control by detecting the displacement and the position where the displacement occurs.

[0004] In the related art, the vibrator is elastically supported on the shell by a metal elastic part. Although this design will increase the structural strength of the elastic part, it will also increase the space occupied by the elastic part due to the metal properties of the elastic part. This will cause the touch button to reduce the magnetic circuit size under the same size structure, resulting in insufficient driving force.

[0005] Therefore, it is necessary to provide a key motor to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a key motor and an electronic device to solve the problem in the related art that the vibrator is elastically supported on the housing by a metal elastic member, thereby increasing the space occupied by the elastic member.

[0007] In a first aspect, the present invention provides a key motor, comprising a hollow shell, a stator fixed to opposite sides of the shell, a vibrator whose two ends are elastically supported at opposite ends of the shell, and a key fixed to the vibrator, wherein the vibrator is spaced apart from the stator and moves relative to the stator along a first direction; the vibrator comprises a magnetic steel and pole cores respectively stacked and fixed to opposite sides of the magnetic steel along the first direction, and the key is fixed to a side of one of the pole cores away from the magnetic steel; the stator comprises two iron cores respectively fixed to opposite sides of the shell and a coil wound around the iron cores; The key motor also includes two non-metallic elastic parts respectively fixed at the opposite ends of the shell, and the non-metallic elastic parts can be deformed along the first direction. The two non-metallic elastic parts are also respectively fixedly connected with the vibrator and elastically suspend the vibrator in the shell.

[0008] Preferably, the key motor further comprises a connecting piece integrally formed with the non-metallic elastic piece, wherein the connecting piece is arranged on a side of the non-metallic elastic piece close to the vibrator and is fixedly connected to the vibrator.

[0009] Preferably, the connecting member is fixed to the pole core and spaced apart from the magnetic steel.

[0010] Preferably, a groove recessed in a direction away from the magnetic steel is provided on a side of the non-metallic elastic member close to the magnetic steel, and the connecting member is formed in the groove.

[0011] Preferably, the non-metallic elastic member and the vibrator are integrally formed.

[0012] Preferably, the non-metallic elastic member is made of silicone or rubber.

[0013] Preferably, a protruding and extending fixing portion is provided on the outer side of the non-metallic elastic member, and a fixing hole penetrating therethrough is provided on the outer shell at a position corresponding to the fixing portion, and the fixing portion extends into the fixing hole.

[0014] Preferably, the shell includes two side shells that are opposite to each other and spaced apart and parallel to its long axis direction, and a first end cover and a second end cover that respectively connect the two opposite ends of the two side shells; the iron core is respectively fixed to the side of the two side shells that are close to each other, and the two non-metallic elastic parts are respectively fixed to the first end cover and the second end cover.

[0015] Preferably, the two side shells are both flat-plate shaped; or, The two side shells are both magnetic conductive structures and are U-shaped.

[0016] Preferably, the button includes a main body portion spaced apart from and arranged opposite to the outer shell, and a first connecting portion and a second connecting portion formed by protruding and extending from the main body portion on one side close to the pole core, and the first connecting portion and the second connecting portion respectively extend into the outer shell and are respectively fixed to the pole core.

[0017] In a second aspect, the present invention provides an electronic device, which includes an outer frame and a key motor as described above accommodated in the outer frame, the outer side of the outer frame is provided with an inwardly recessed receiving groove, and the bottom of the receiving groove is provided with a through hole passing therethrough; the outer shell is fixed to the inner side of the outer frame, and part of the structure of the key is accommodated in the receiving groove and fixed to the vibrator through the through hole.

[0018] Compared with the related art, the key motor of the present invention is designed with two non-metallic elastic parts respectively fixed at the opposite ends of the shell, and the non-metallic elastic parts can be deformed along the first direction. The two non-metallic elastic parts also elastically suspend the vibrator in the shell. In this way, the space occupied by the elastic parts after installation can be reduced through the non-metallic elastic design, so that the key motor can increase its magnetic circuit size as much as possible under the same size structure, so that its driving force is sufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which: Figure 1 A schematic diagram of the three-dimensional structure of a key motor provided in the first embodiment of the present invention; Figure 2 A schematic diagram of the structure decomposition of a key motor provided in the first embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the key motor provided by the first embodiment of the present invention after the key is removed; Figure 4 for Figure 1 The cross-section diagram of the AA line; Figure 5 for Figure 1 Sectional view along the midline BB; Figure 6 A schematic diagram of the three-dimensional structure of the key motor provided in the second embodiment of the present invention without the key and the mounting part; Figure 7 for Figure 6 Sectional view of the mid-CC line; Figure 8 A schematic diagram of the three-dimensional structure of the key motor provided in the third embodiment of the present invention without the key and the mounting part; Fig. 9 A schematic diagram of a structural exploded view of a key motor provided in Embodiment 3 of the present invention without keys and mounting parts; Fig.10 for Figure 8 Sectional view along the mid-DD line; Fig.11 A schematic diagram of the three-dimensional structure of an electronic device provided in Embodiment 3 of the present invention; Fig.12 This is a schematic diagram of the structural decomposition of the electronic device provided in Example 3 of the present invention.

[0020] Among them, 100, key motor; 1, shell; 11, side shell; 12, first end cover; 13, second end cover; 14, fixing hole; 2, stator; 21, iron core; 22, coil; 3, vibrator; 31, magnet; 32, pole core; 4, key; 41, main body; 42, first connecting part; 43, second connecting part; 44, guide member; 5, non-metallic elastic member; 51, groove; 52, fixing part; 6, connecting member; 7, mounting part; 71, mounting hole; 200, electronic device; 201, outer frame; 202, receiving groove; 203, through hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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.

[0022] Embodiment 1 The embodiment of the present invention provides a key motor 100, combined with Figures 1 to 5 As shown, it includes a hollow shell 1, a stator 2 fixed on opposite sides of the shell 1, a vibrator 3 with two ends elastically supported on opposite ends of the shell 1, and a button 4 fixed to the vibrator 3. The vibrator 3 is spaced apart from the stator 2 and moves along a first direction relative to the stator 2. The vibrator 3 includes a magnetic steel 31 and pole cores 32 stacked and fixed on opposite sides of the magnetic steel 31 along the first direction, and the button 4 is fixed on one side of the pole cores 32 away from the magnetic steel 31. The stator 2 includes two iron cores 21 fixed on opposite sides of the shell 1 and a coil 22 wound around the iron cores 21.

[0023] The first direction is the direction in which the vibrator 3 vibrates, that is, the direction in which the button 4 is displaced when the button 4 is pressed.

[0024] The housing 1 includes two side shells 11 that are opposite, spaced apart and parallel to the long axis thereof, and a first end cover 12 and a second end cover 13 that connect the two opposite ends of the two side shells 11 ; the core 21 is fixed to the sides of the two side shells 11 that are close to each other.

[0025] The first end cover 12 and the second end cover 13 are both provided with mounting parts 7 on the side away from each other, and each mounting part 7 is respectively provided with a mounting hole 71 penetrating therethrough. In this design, the key motor 100 can be mounted to other devices by passing a screw or a rivet through the mounting hole 71.

[0026] In this embodiment, the two side shells 11 are both magnetically conductive structures and are U-shaped; the two iron cores 21 are fixed to the middle area of ​​the side shells 11 and are arranged opposite to each other; the first end cover 12 and the second end cover 13 are both U-shaped.

[0027] When the coil 22 is energized, the side housing 11 and the iron core 21 are polarized to produce different magnetic poles, such as Figure 5 As shown; accordingly, the pole core 32 vibrates under the action of the side shell 11 and the iron core 21.

[0028] The button 4 includes a main body 41 spaced apart from and arranged opposite to the housing 1 , and a first connection part 42 and a second connection part 43 protruding and extending from one side of the main body 41 close to the vibrator 3 . The first connection part 42 and the second connection part 43 extend into the housing 1 and are fixed to the pole core 32 .

[0029] In addition, the key motor 100 further includes a guide member 44 respectively sleeved on the first connection portion 42 and the second connection portion 43. This design allows the guide member 44 to be installed on the frame of the electronic device 200 to guide the first connection portion 42 and the second connection portion 43.

[0030] Specifically, the key motor 100 also includes two non-metallic elastic parts 5 respectively fixed at the two ends of the shell 1 and a connecting part 6 integrally formed with the non-metallic elastic part 5. The non-metallic elastic part 5 can be deformed along the first direction. The connecting part 6 is connected to the pole core 32 and is spaced apart from the magnetic steel 31. The connecting part 6 suspends the vibrator 3 in the shell 1.

[0031] Among them, the non-metallic elastic part 5 is made of silicone or rubber, the shell 1 and the connecting part 6 are both made of metal materials, such as stainless steel, aluminum alloy, etc., and the non-metallic elastic part 5 is respectively formed with the shell 1 and the connecting part 6 by integral injection molding; the non-metallic elastic part 5 and the connecting part 6 are both block-shaped.

[0032] The two non-metallic elastic members 5 are fixed to the first end cover 12 and the second end cover 13 respectively.

[0033] The middle area of ​​the connecting member 6 close to the magnetic steel 31 protrudes and extends between the two pole cores 32 .

[0034] The magnetization method of the magnetic steel 31 is that the two pole cores 32 on the opposite sides are magnetized to different magnetic poles, namely, the N pole and the S pole. Figure 5 shown.

[0035] A protruding and extending fixing portion 52 is provided on the outer side of the non-metallic elastic member 5 , and a fixing hole 14 penetrating therethrough is provided at a position of the housing 1 corresponding to the fixing portion 52 , and the fixing portion 52 extends into the fixing hole 14 .

[0036] In this embodiment, the fixing holes 14 are arranged at the first end cover 12 and the second end cover 13 of the housing 1; the non-metallic elastic member 5 is provided with a fixing portion 52 on all the other sides except the side close to the vibrator 3, and correspondingly, the U-shaped first end cover 12 and the second end cover 13 are provided with a fixing hole 14 at the position corresponding to the fixing portion 52.

[0037] A groove 51 is provided on one side of the non-metallic elastic member 5 close to the magnetic steel 31 and is recessed away from the magnetic steel 31. The connecting member 6 is formed in the groove 51. This design can further reduce the space occupied by the non-metallic elastic member 5 and the connecting member 6.

[0038] In this embodiment, since the magnetic steel 31 and the pole core 32 of the vibrator 3 are not easy to be integrally molded with the non-metallic elastic member 5, by adding the connecting member 6, the non-metallic elastic member 5 can be more easily integrally molded with the vibrator 3 by means of integral injection molding. Of course, without adding the connecting member 6, the vibrator 3 and the non-metallic elastic member 5 can also be directly integrally molded by means of silicone primer.

[0039] The key motor 100 in this embodiment is also designed with a flexible circuit board (not shown) electrically connected to the coil 22 and a sensor (not shown) electrically connected to the flexible circuit board according to actual needs. The sensor is used to detect the pressure position and pressure intensity of the key 4, and the flexible circuit board is used to energize the coil 22 and make corresponding control instructions according to the detection results of the sensor.

[0040] Compared with the related art, the key motor 100 of this embodiment is designed with two non-metallic elastic parts 5 respectively fixed at opposite ends of the shell 1, and the non-metallic elastic parts 5 can be deformed along the first direction. The two non-metallic elastic parts 5 elastically suspend the vibrator 3 in the shell 1. In this way, the space occupied by the elastic parts after installation can be reduced through the non-metallic elastic design, so that the key motor 100 can increase its magnetic circuit size as much as possible under the same size structure, so that its driving force is sufficient.

[0041] Embodiment 2 Combination Figure 6 and Figure 7 As shown, the key motor 100 in this embodiment is different from the key motor 100 in the first embodiment in that the two side shells 11 are both flat and not magnetically conductive. In this case, the iron core 21 is mainly magnetized, and its magnetic poles after magnetization are as shown in FIG. Figure 7 This design can make the housing 1 free of bending, and facilitates the production of the housing 1.

[0042] Embodiment 3 Combination Figures 8 to 10As shown, the key motor 100 in this embodiment is different from the key motor 100 in Example 1 or Example 2 in that the key motor 100 in this embodiment is not provided with a connecting member 6, that is, two non-metallic elastic members 5 are respectively fixedly connected with the vibrator 3, and the vibrator 3 is elastically suspended in the housing 1.

[0043] The non-metallic elastic member 5 is integrally formed with the vibrator 3, that is, the non-metallic elastic member 5 can be integrally injection molded with the vibrator 3 by means of silicone primer; specifically, the non-metallic elastic member 5 is integrally injection molded with the magnetic steel 31 and the pole core 32 of the vibrator 3. Of course, according to actual needs, the non-metallic elastic member 5 can also be fixedly connected with the magnetic steel 31 and the pole core 32 of the vibrator 3 by means of gluing (glue bonding).

[0044] On the basis of the non-metallic elastic member 5 being provided with the groove 51 , the ends of the magnetic steel 31 and the pole core 32 are directly fixed in the groove 51 .

[0045] The key motor 100 in this embodiment can reduce the use of parts and further increase the size of its magnetic circuit.

[0046] Embodiment 4 This embodiment provides an electronic device 200, Fig.11 and Fig.12 As shown, it includes an outer frame 201 and a key motor 100 as in the above-mentioned embodiment 1 or embodiment 2 accommodated in the outer frame 201. The outer side of the outer frame 201 is provided with an inwardly recessed receiving groove 202, and the bottom of the receiving groove 202 is provided with a through hole 203 passing through it; the outer shell 1 is fixed to the inner side of the outer frame 201, and part of the structure of the key 4 is accommodated in the receiving groove 202 and fixed to the vibrator 3 through the through hole 203.

[0047] Part of the main body 41 of the button 4 is received in the receiving groove 202 , and the first connecting member 6 and the second connecting member 6 of the button 4 are respectively passed through two through holes 203 provided in the receiving groove 202 and fixed to the pole core 32 .

[0048] When the first connecting member 6 and the second connecting sleeve are provided with a guide member 44 , the guide member 44 is fixed in the through hole 203 .

[0049] The electronic device 200 is a device that requires button 4 operation scenarios, such as a mobile phone, AR, earphones, a handle, a steering wheel, and a tablet.

[0050] Since the electronic device 200 in this embodiment includes the key motor 100 in the above-mentioned first or second embodiment, it can also achieve the technical effects achieved by the key motor 100 in the above-mentioned first or second embodiment, which will not be elaborated here.

[0051] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A key motor, comprising a hollow shell, a stator fixed to opposite sides of the shell, a vibrator with two ends elastically supported at opposite ends of the shell, and a key fixed to the vibrator, wherein the vibrator is spaced apart from the stator and moves relative to the stator along a first direction; the vibrator comprises a magnetic steel and pole cores stacked and fixed to opposite sides of the magnetic steel along the first direction, and the key is fixed to a side of one of the pole cores away from the magnetic steel; the stator comprises two iron cores fixed to opposite sides of the shell, and a coil wound around the iron core; characterized in that: The key motor also includes two non-metallic elastic parts respectively fixed at the opposite ends of the shell, and the non-metallic elastic parts can be deformed along the first direction. The two non-metallic elastic parts are also respectively fixedly connected with the vibrator and elastically suspend the vibrator in the shell.

2. The key motor according to claim 1, characterized in that: The key motor further includes a connecting piece integrally formed with the non-metallic elastic piece. The connecting piece is disposed on a side of the non-metallic elastic piece close to the vibrator and is fixedly connected to the vibrator.

3. The key motor according to claim 2, characterized in that: The connecting member is fixed to the pole core and spaced apart from the magnetic steel.

4. The key motor according to claim 2, characterized in that: A groove which is recessed in a direction away from the magnetic steel is provided on a side of the non-metallic elastic member close to the magnetic steel, and the connecting member is formed in the groove.

5. The key motor according to claim 1, characterized in that: The non-metallic elastic member is integrally formed with the vibrator.

6. The key motor according to claim 1, characterized in that: The non-metallic elastic member is made of silicone or rubber.

7. The key motor according to claim 1, characterized in that: A protruding and extending fixing portion is disposed on the outer side of the non-metallic elastic member, a fixing hole penetrating therethrough is disposed on the outer shell at a position corresponding to the fixing portion, and the fixing portion extends into the fixing hole.

8. The key motor according to claim 1, characterized in that: The shell includes two side shells that are opposite, spaced apart and parallel to the long axis direction thereof, and a first end cover and a second end cover respectively connecting the two opposite ends of the two side shells; the iron core is respectively fixed to the sides of the two side shells that are close to each other, and the two non-metallic elastic parts are respectively fixed to the first end cover and the second end cover.

9. The key motor according to claim 8, characterized in that: The two side shells are both flat-plate shaped; or, The two side shells are both magnetic conductive structures and are U-shaped.

10. The key motor according to claim 1, characterized in that: The button includes a main body portion which is spaced apart from and arranged opposite to the shell, and a first connection portion and a second connection portion which are formed by protruding and extending from one side of the main body portion close to the pole core. The first connection portion and the second connection portion respectively extend into the shell and are respectively fixed to the pole core.

11. An electronic device, characterized in that: The electronic device includes an outer frame and a key motor as described in claim 1 accommodated in the outer frame, the outer side of the outer frame is provided with an inwardly recessed receiving groove, and the bottom of the receiving groove is provided with a through hole passing through it; the outer shell is fixed to the inner side of the outer frame, and part of the structure of the key is accommodated in the receiving groove and fixed to the vibrator through the through hole.

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