CN219139695U - Multi-dimensional vibration reduction mechanism and electric vibration tool - Google Patents

Abstract

The utility model discloses a multi-dimensional vibration damping mechanism and an electric vibration tool, wherein the multi-dimensional vibration damping mechanism comprises a fixed bracket, a rotary swing vibration damping unit and a left-right swing vibration damping unit, the rotary swing vibration damping unit comprises a first elastic component and a rotary swing vibrator, the first elastic component is arranged on the fixed bracket, and the rotary swing vibrator is connected with the first elastic component; the left-right swinging vibration reduction unit comprises a second elastic component and a left-right swinging vibrator, the second elastic component is arranged on the fixed bracket, and the left-right swinging vibrator is connected with the second elastic component; when the motor vibrates, the multidimensional vibration reduction assembly is excited by the motor to vibrate, the rotary swinging vibrator and the left-right swinging vibrator respectively generate tangential rotary swinging vibration and left-right swinging vibration due to mass inertia of the rotary swinging vibrator, the first elastic assembly and the second elastic assembly respectively provide restoring force, phase difference is generated between the first elastic assembly and the motor vibration respectively, and mechanical offset is formed, so that vibration reduction or vibration elimination effect is achieved.

Description

Multi-dimensional vibration reduction mechanism and electric vibration tool

technical field

The utility model relates to the technical field of electric vibration tools, in particular to a multi-dimensional damping mechanism and an electric vibration tool.

Background technique

Electric vibration tools currently on the market, such as electric toothbrushes, electric massage tools, etc., mainly absorb the vibration energy of the motor through soft rubber pads to achieve vibration reduction. However, for high-frequency vibrations, the vibration reduction effect of this vibration reduction method is not good. too obvious. If the electric toothbrush or the electric massage tool is opened and placed on the table, the electric toothbrush or the electric massage tool will move irregularly on the table due to the strong vibration. Or if you hold an electric toothbrush or an electric massage tool in your hand, you will feel a strong numbness in your hand, and the use effect is not good.

Utility model content

The purpose of this utility model is to overcome the above-mentioned defects in the prior art, and provide a multi-dimensional vibration damping mechanism and an electric vibration tool. The multi-dimensional vibration damping mechanism is used to generate phase differences with the vibration of the motor in multiple dimensions, forming a mechanical Offset, so as to achieve the effect of vibration reduction or vibration elimination.

In order to achieve the above object, the technical scheme of the utility model is as follows:

A multi-dimensional vibration damping mechanism for electric vibration tools, including a fixed bracket, a rotary swing vibration damping unit and a left and right swing vibration damping unit,

The rotary vibration damping unit includes a first elastic component and a rotary swing vibrator, the first elastic component is installed on the fixed bracket, and the rotary swing vibrator is connected to the first elastic component;

The left and right swing damping unit includes a second elastic component and a left and right swing vibrator, the second elastic component is installed on the fixed bracket, and the left and right swing vibrator is connected to the second elastic component;

When the motor of the electric vibrating tool vibrates, the multi-dimensional vibration damping component is excited by the motor to vibrate, the rotary swing vibrator produces tangential rotary swing vibration due to its own mass inertia, and the first elastic component provides the The first restoring force for the rotating and oscillating vibrator to return to its original position, the first restoring force causes the rotating and oscillating vibrator to vibrate in the direction opposite to that of the motor, and the left and right oscillating vibrator is generated due to its own mass inertia Left and right swing vibration, the second elastic component provides the second restoring force for the left and right swing vibrator to return to its original position, and the second restoring force causes the left and right swing vibrator to generate a force opposite to the motor in the left and right swing direction vibration.

The utility model also discloses an electric toothbrush, which comprises the above-mentioned multi-dimensional damping mechanism.

Implement the utility model embodiment, will have following beneficial effect:

In the embodiment of the utility model, by arranging a rotary swing vibration damping unit and a left and right swing vibration damping unit, the tangential rotary swing and the left and right swing caused by the motor are respectively damped or eliminated; The left and right swing vibration damping unit, when the motor vibrates, the rotary swing vibration damping unit and the left and right swing vibration damping unit are respectively excited, the rotary swing vibrator generates tangential rotary swing vibration due to its own mass inertia, and the first elastic component provides the rotary swing vibrator to restore the original The first restoring force of the position, the first restoring force makes the rotating swing vibrator generate vibration opposite to that of the motor in the tangential rotating swing direction, the left and right swinging vibrator generates left and right swinging vibration due to its own mass inertia, and the second elastic component provides the left and right swinging vibrator The second restoring force to restore the original position, the second restoring force causes the left and right swing vibrator to vibrate in the opposite direction to the motor in the left and right swing direction, so as to form a mechanical offset in the tangential rotation swing and left and right swing directions respectively, achieving multi-dimensional reduction vibration or damping purposes.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

in:

Fig. 1 is a schematic diagram of an exploded structure of a multi-dimensional damping mechanism of a specific embodiment of the present invention.

Fig. 2 is a schematic diagram of an exploded structure of a rotary vibration damping unit according to another specific embodiment of the present invention.

Fig. 3 is a schematic diagram of an exploded structure of a rotary vibration damping unit according to another specific embodiment of the present invention.

Fig. 4 is a schematic diagram of the connection structure of the motor assembly and the multi-dimensional damping mechanism of a specific embodiment of the present invention.

Fig. 5 is a schematic cross-sectional structure diagram of an electric toothbrush according to a specific embodiment of the present invention.

Fig. 6 is a schematic diagram of the distribution of the multi-dimensional damping mechanism inside the handle according to a specific embodiment of the present invention.

Fig. 7 is a schematic diagram of the distribution of the multi-dimensional damping mechanism inside the handle according to another specific embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. 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.

Referring to Fig. 1, the utility model discloses a multi-dimensional vibration damping mechanism 10, which is used for electric vibration tools, including a fixed bracket 11, a rotary swing vibration damping unit 12 and a left and right swing vibration damping unit 13, and the rotary swing vibration damping unit 12 includes The first elastic assembly 122 and the rotating swing vibrator 121, the first elastic assembly 122 is installed on the fixed bracket 11, the rotating swing vibrator 121 is connected with the first elastic assembly 122; the left and right swing damping unit 13 includes the second elastic assembly 132 and the left and right The oscillating vibrator 131 and the second elastic component 132 are installed on the fixed bracket 11, and the left and right oscillating vibrator 131 is connected with the second elastic component 132; when the motor 41 of the electric vibration tool vibrates, the multi-dimensional vibration damping component is excited by the motor 41 to generate vibration The oscillating vibrator 121 produces tangential oscillating vibration due to its own mass inertia, the first elastic component 122 provides the first restoring force for the oscillating vibrator 121 to return to its original position, and the first restoring force causes the oscillating vibrator 121 to generate In the opposite direction to the vibration of the motor 41, the left-right swing vibrator 131 generates left-right swing vibration due to its own mass inertia, and the second elastic component 132 provides the second restoring force for the left-right swing vibrator 131 to return to its original position, and the second restoring force makes the left-right swing vibrator 131 in the Vibration opposite to that of the motor 41 is generated in the left and right swing direction. The rotation vibration damping unit 12 and the left and right swing vibration damping unit 13 respectively form a mechanical offset from the tangential rotation and left and right swing directions, so as to achieve the purpose of multi-dimensional vibration reduction or vibration elimination. The fixed bracket 11 is used for installing the rotation vibration damping unit 12 and the left and right swing vibration damping unit 13 , so that the vibration damping mechanism is integrated, which is convenient for assembling the vibration damping mechanism outside the handle 20 . The vibration frequencies of the rotational oscillation vibrator 121 and the lateral oscillation oscillation element 131 are respectively equivalent to the vibration frequency of the motor 41 .

Referring to Fig. 5, in a specific embodiment, the electric vibration tool is an electric toothbrush, including the above-mentioned multi-dimensional shock absorbing mechanism, and the electric toothbrush also includes a handle 20, a toothbrush head 30, a motor assembly 40, a battery 50 and a control board 60, and the handle 20 There is a housing cavity inside, and the motor assembly 40, the battery 50 and the control board 60 are all accommodated in the housing cavity. The motor assembly 40 includes a motor 41 and an output shaft 42. connected, the motor 41 drives the output shaft 42 to rotate eccentrically, and the eccentric rotation of the output shaft 42 drives the toothbrush head 30 to swing left and right. The above-mentioned multi-dimensional vibration damping mechanism 10 is also housed in the housing cavity. The multi-dimensional vibration damping mechanism 10 and the motor assembly 40 are arranged coaxially. 42 (or the swinging centerline of the motor) is symmetrical, and the rotating swinging vibrator 121 takes the output shaft 42 as the rotating center axis and performs tangential rotational reciprocating motion to offset or partially offset the tangential rotational vibration generated by the motor 41. The left and right swing vibrator 131 is located on the swing center line of the motor, and the left and right swing vibrator 131 reciprocates along the left and right swing direction (that is, the direction perpendicular to the output shaft 42) to offset or partially offset the left and right swing vibration generated by the motor 41.

In another embodiment, the electric vibration tool is an electric massage tool, including the above-mentioned multi-dimensional shock absorbing mechanism, the electric massage tool also includes a handle 20, a massage head, a motor assembly 40, a battery 50 and a control board 60, and the handle 20 is provided with The housing cavity, the motor assembly 40, the battery 50 and the control board 60 are all accommodated in the housing cavity. The motor assembly 40 includes a motor 41 and an output shaft 42. The output shaft 42 protrudes from the end of the handle 20 and is connected to the massage head. The motor 41 The output shaft 42 is driven to rotate eccentrically, and the output shaft 42 eccentrically rotates to drive the massage head to swing left and right.

1 to 3, in a specific embodiment, the first elastic component 122 includes a first cantilever end 1221, the first cantilever end 1221 is connected to the rotating oscillator 121, and the number of the first cantilever end 1221 is at least one Each first cantilever end 1221 is provided with at least one rotary oscillating vibrator 121 , the distribution of the first cantilever ends 1221 is symmetrical with respect to the output shaft 42 , and the distribution of the rotational oscillating vibrator 121 is symmetrical with respect to the output shaft 42 .

1 to 3, in a specific embodiment, the second elastic component 132 includes a second cantilever end 1321, the second cantilever end 1321 is connected to the left and right swing vibrator 131, and the number of the second cantilever end 1321 is at least one , each second cantilever end 1321 is provided with at least one left and right oscillating vibrator 131 .

1 and 2, in a specific embodiment, the first elastic component 122 includes a first cantilever beam 1224 and a second cantilever beam 1227, and the first cantilever beam 1224 has a first end 1225 and a second end 1226 opposite to each other. , the second cantilever beam 1227 has a third end 1228 and a fourth end 1229 opposite to each other, the first end 1225 and the third end 1228 are connected to form the first cantilever end 1221, the second end 1226 and the fourth end 1229 are respectively fixed with The brackets 11 are connected to each other, and the first cantilever end 1221 is provided with a rotating and oscillating vibrator 121 . When vibrating, the rotating and oscillating vibrator 121 rotates and oscillates in a tangential direction. The first cantilever beam 1224 and the second cantilever beam 1227 are respectively in compression and tension. When they are in compression, they provide damping. When they are compressed and stretched to At the maximum displacement, the first cantilever beam 1224 and the second cantilever beam 1227 respectively provide the restoring force for the rotary swing vibrator 121 to return to its original position. The first cantilever beam 1224 and the second cantilever beam 1227 are symmetrical about the output shaft 42, and the first cantilever end 1221 Located on the axis of the output shaft 42 .

Referring to FIG. 1 , further, in a specific embodiment, the second end 1226 and the fourth end 1229 are respectively connected to the middle position of the fixing bracket 11 , and the first cantilever beam 1224 and the second cantilever beam 1227 are respectively linear.

In this embodiment, preferably, the first elastic component 122 further includes a first support beam 123 connected to the first cantilever beam 1224 and a second support beam 124 connected to the second cantilever beam 1227, the first support The beam 123 is arranged on the side of the first cantilever beam 1224 away from the second cantilever beam 1227, and the second supporting beam 124 is arranged on the side of the second cantilever beam 1227 away from the first cantilever beam 1224. When vibrating, the first supporting beam 123 and the second support beam 124 can improve the damping and restoring force of the first cantilever beam 1224 and the second cantilever beam 1227 respectively.

Referring to FIG. 2 , in another specific embodiment, the second end 1226 and the fourth end 1229 are respectively connected to two ends of the fixed bracket 11 that are far away from each other, and the first cantilever beam 1224 and the second cantilever beam 1227 are arc-shaped respectively. , the arc can enhance the elasticity of the first cantilever beam 1224 and the second cantilever beam 1227 .

Referring to Fig. 1 and Fig. 2, in the above two embodiments, one rotary oscillating vibrator 121 located on the axis of the output shaft 42 can be provided at the first cantilever end 1221, or more than two rotary oscillating vibrators 121 can be provided. When there are two rotating and oscillating vibrators 121, the distribution of the rotating and oscillating vibrators 121 is symmetrical with respect to the output shaft 42. Preferably, one rotating and oscillating vibrator 121 is respectively arranged on both sides of the first cantilever end 1221 which is symmetrical with respect to the output shaft 42, and the two rotating and oscillating vibrators 121 The connection direction is the same as the direction from the first cantilever beam 1224 to the second cantilever beam 1227 , so that the elastic force in the direction from the first cantilever beam 1224 to the second cantilever beam 1227 can be improved.

The materials of the first cantilever beam 1224 and the second cantilever beam 1227 are plastic material or metal material respectively. Preferably, in this specific embodiment, the materials of the first cantilever beam 1224 and the second cantilever beam 1227 are respectively plastic materials, and are integrally formed with the fixing bracket 11 .

Referring to FIG. 3 , in another specific embodiment, the first elastic assembly 122 includes a symmetrical elastic piece, which is symmetrical to the swing centerline of the motor (or the axis when the output shaft is stationary), and the symmetrical elastic piece is along the swinging axis of the motor. At least one of the opposite ends of the center line is a fixed end 1222, which is connected to the fixed bracket 11, and the symmetrical elastic piece is set away from the swing center line of the motor. Two first cantilever ends 1221 that are symmetrical to the swing center line are arranged. The two first cantilever ends 1221 are respectively connected to a rotary oscillator 121 .

Referring to Fig. 3, further, the symmetrical elastic piece is a cross elastic piece, the opposite ends of the cross elastic piece are fixed ends 1222, the fixed end 1222 is connected with the fixed bracket 11, and the other two opposite ends of the cross elastic piece are respectively It is the first cantilever end 1221 , and the two first cantilever ends 1221 are respectively connected with a rotating oscillator 121 . When vibrating, the two rotating oscillators 121 rotate and vibrate in the tangential direction, and the two first cantilever ends 1221 bend first. At this time, the beam 1223 between the two fixed ends 1222 acts as a damper, and then the beam 1223 between the two fixed ends 1222 When the two first cantilever ends 1221 reach the maximum displacement, the two first cantilever ends 1221 provide a restoring force that makes the rotating and oscillating vibrator 121 return to its original position. Vibration in the opposite direction to that of the motor 41 is generated. The two first cantilever ends 1221 meet at the midpoint of the beam 1223 between the two fixed ends 1222 . The thickness of the cross elastic piece is much smaller than the width of the beam 1223 between the two fixed ends 1222 or the width of the two first cantilever ends, which improves the elasticity of the cross elastic piece along the thickness direction.

In other embodiments, the symmetrical elastic piece may also include a reinforcing rib structure or a reinforcing hollow structure.

Preferably, the fixing bracket 11 is provided with a locking slot 111 for locking the fixed end 1222, which is convenient for assembly.

Preferably, the symmetrical elastic sheet/cross elastic sheet is a metal sheet or a synthetic rigid material (such as engineering plastics, etc.), and preferably, the Young's modulus of the symmetrical elastic sheet/cross elastic sheet is higher than 2000 MPa.

Referring to FIG. 1 , in a specific embodiment, the second elastic component 132 includes a third cantilever beam 1322, one end of the third cantilever beam 1322 is connected to the fixed bracket 11, and the other end of the third cantilever beam 1322 is the second cantilever end 1321. The third cantilever beam 1322 is in the shape of a round hook. The second cantilever end 1321 is connected to the left and right oscillating vibrator 131 . The third cantilever beam 1322 is in the shape of a round hook. On the one hand, it can provide greater restoring force and damping effect. The cantilever end can provide enough elasticity.

In the above-mentioned embodiments, both the rotating oscillating vibrator 121 and the left and right oscillating vibrator 131 are metal weights.

Referring to Fig. 4, in a specific embodiment, the multi-dimensional damping mechanism is directly rigidly connected with the motor assembly 40, the multi-dimensional damping mechanism is arranged on the end of the motor assembly 40 away from the output shaft 42, and the fixed bracket 11 is provided with The engaging structure 112 of the motor assembly 40 is engaged with each other, and the engaging structure 112 is convenient for positioning. In order to enhance the rigidity of the connection between the multi-dimensional damping mechanism and the motor assembly 40, glue can also be dispensed at the connection. It is of course also possible to achieve the connection only by dispensing glue. In other embodiments, the connection can also be realized by fasteners such as bolts, and bolt installation holes 113 are provided on the fixing bracket 11 to realize the bolt connection. In this embodiment, the multi-dimensional damping mechanism and the motor assembly 40 form a new damping motor assembly 40, and the swing of the motor 41 directly drives the swinging oscillator 121 and the left-right swinging oscillator 131 of the multi-dimensional damping mechanism 10 to swing. The vibration of the vibrator 121 and the left-right swing vibrator 131 produces phase differences opposite to the swing of the motor 41 in the tangential rotation direction and the left-right swing direction respectively, forming a mechanical offset, thereby achieving the effect of multi-dimensional vibration reduction or vibration elimination.

Referring to Fig. 6 and Fig. 7, in another specific embodiment, the multi-dimensional shock absorbing mechanism is indirectly rigidly connected with the motor assembly 40, and the electric vibration tool also includes a main frame 70, a motor assembly 40, a multi-dimensional shock absorbing mechanism 10, and a battery 50 and the control board 60 are installed on the main frame 70, and then the main frame 70 is installed in the accommodation cavity of the handle 20, the motor assembly 40 transmits the vibration to the main frame 70, and the main frame 70 transmits the vibration to the multi-dimensional shock absorbing mechanism. The multi-dimensional vibration-damping mechanism 10 can be arranged at any position of the main frame 70, and the multi-dimensional vibration-damping mechanism 10 is preferably arranged at a position where the motor 41 generates the strongest vibration feeling when it swings.

In another specific embodiment, the fixed bracket 11 and the host bracket 70 are combined into one structure, that is, the first elastic component 122 , the rotating swing vibrator 121 , the second elastic component 132 and the left and right swing vibrator 131 can all be installed on the host bracket 70 Alternatively, the motor assembly 40 , the battery 50 and the control board 60 are all mounted on the fixing bracket 11 .

The above-mentioned embodiments only express several implementation modes of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (10)

1. A multi-dimensional damping mechanism for electric vibration tools, characterized in that it comprises a fixed bracket, a rotating swing damping unit and a left and right swing damping unit, The rotary vibration damping unit includes a first elastic component and a rotary swing vibrator, the first elastic component is installed on the fixed bracket, and the rotary swing vibrator is connected to the first elastic component; The left and right swing damping unit includes a second elastic component and a left and right swing vibrator, the second elastic component is installed on the fixed bracket, and the left and right swing vibrator is connected to the second elastic component; When the motor of the electric vibrating tool vibrates, the multi-dimensional vibration damping mechanism is excited by the motor to vibrate, and the rotating and oscillating vibrator generates tangential rotating and oscillating vibration due to its own mass inertia, and the first elastic component provides the The first restoring force for the rotating and oscillating vibrator to return to its original position, the first restoring force causes the rotating and oscillating vibrator to vibrate in the direction opposite to that of the motor, and the left and right oscillating vibrator is generated due to its own mass inertia Left and right swing vibration, the second elastic component provides the second restoring force for the left and right swing vibrator to return to its original position, and the second restoring force causes the left and right swing vibrator to generate a force opposite to the motor in the left and right swing direction vibration. 2. The multi-dimensional vibration damping mechanism according to claim 1, wherein the first elastic component comprises a first cantilever end, and the first cantilever end is connected to the rotary oscillator; The second elastic component includes a second cantilever end, and the second cantilever end is connected with the left-right swing vibrator. 3. The multi-dimensional vibration damping mechanism according to claim 2, wherein the first elastic component comprises a symmetrical elastic piece, the symmetrical elastic piece is symmetrical with respect to the swing center line of the motor, and the symmetrical elastic piece At least one of the two opposite ends along the swing center line is a fixed end, and the fixed end is connected to the fixed bracket, and the symmetrical elastic piece is also provided with two The first cantilever end, the two first cantilever ends are symmetrical with respect to the swing center line, and the two first cantilever ends are respectively connected to one of the rotating swing vibrators. 4. The multi-dimensional damping mechanism according to claim 2, wherein the first elastic assembly comprises a first cantilever beam and a second cantilever beam, and the first cantilever beam has a first end and a second cantilever beam oppositely arranged. The second end, the second cantilever beam has a third end and a fourth end oppositely arranged, the first end and the third end are connected to form the first cantilever end, the second end and the The fourth ends are respectively connected with the fixing brackets. 5. The multi-dimensional vibration damping mechanism according to claim 4, characterized in that, the second end and the fourth end are respectively connected to two ends of the fixed bracket that are far away from each other, and the first cantilever The beam and the second cantilever beam are respectively arc-shaped. 6. The multi-dimensional vibration damping mechanism according to claim 4, characterized in that, the second end and the fourth end are respectively connected to the middle position of the fixed bracket, and the first cantilever beam and the The second cantilever beams are respectively linear. 7. The multi-dimensional damping mechanism according to claim 6, characterized in that, the first elastic assembly further comprises a first support beam connected to the first cantilever beam and a first support beam connected to the second cantilever beam. The second support beam connected, the first support beam is arranged on the side of the first cantilever beam away from the second cantilever beam, and the second support beam is arranged on the side of the second cantilever beam far away from the second cantilever beam. One side of the first cantilever beam. 8 . The multi-dimensional vibration damping mechanism according to any one of claims 4 to 7 , characterized in that, the two sides of the first cantilever end are respectively provided with one said rotating and oscillating vibrator. 9 . 9. The multi-dimensional vibration damping mechanism according to any one of claims 2-7, wherein the second elastic component comprises a third cantilever beam, one end of the third cantilever beam is connected to the fixed bracket connected, the other end of the third cantilever beam is the second cantilever end, and the third cantilever beam is in the shape of a round hook. 10. An electric vibration tool, characterized by comprising the multi-dimensional vibration damping mechanism according to any one of claims 1-9.

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