EP-4738669-A1 - LINEAR ACTUATING DEVICE AND HAIR CUTTING DEVICE

Abstract

The invention belongs to the technical field of linear motors and specifically discloses a linear actuating device and a hair cutting device. By disposing an installation frame (200), an electromagnet (100) is disposed horizontally in an electromagnet installation part, and a magnet group (300) is disposed in a magnet group installation part, so that the magnet group is positioned opposite to a magnet pole of a corresponding end of the electromagnet disposed horizontally. When alternating current is flowed through the electromagnet, a magnetic induction action between the electromagnet and the magnet group causes the magnet group to reciprocate along a direction perpendicular to a central axis of the electromagnet. By arranging the electromagnet horizontally and placing the magnet group on a side of the electromagnet opposite to the magnet pole of the electromagnet, a horizontal space can be fully utilized, which significantly reduces a height of the linear actuating device, thereby reducing a length of products with the linear actuating device, coordinating a proportion of the products in length and horizontal directions, and enhancing the beauty of the products' appearance.

Inventors

• WONG, YING MAN JOHN
• Wong, Yin Wai

Assignees

• Raymond (Panyu Nansha) Electrical Appliances Development Co., Ltd.

Dates

Publication Date

20260506

Application Date

20250310

Claims (11)

1. A linear actuating device comprising: an installation frame, wherein the installation frame comprises: an electromagnet installation part; and a magnet group installation part, disposed on a side of the electromagnet installation part; an electromagnet, horizontally disposed in the electromagnet installation part; and a magnet group, disposed in the magnet group installation part, wherein after the magnet group is disposed in the magnet group installation part, the magnet group is positioned opposite to a magnet pole of an end of the electromagnet disposed in the electromagnet installation part.
2. The linear actuating device as claimed in claim 1, wherein a number of the magnet group installation part is two, the two magnet group installation parts are respectively disposed on two sides of the electromagnet installation part, a number of the magnet group is two, the two magnet groups are respectively disposed in the two magnet group installation parts, and each magnet group is positioned opposite to a magnet pole of a corresponding end of the electromagnet disposed in the electromagnet installation part.
3. The linear actuating device as claimed in claim 1 or claim 2, wherein the magnet group installation part is elastically connected to the electromagnet installation part through an elastic connection part; and the elastic connection part is integrated with the electromagnet installation part into one whole, or the elastic connection part is detachably connected to the electromagnet installation part by fasteners.
4. The linear actuating device as claimed in claim 3, wherein connecting walls are respectively disposed on two sides of the electromagnet installation part, first extension parts are respectively disposed on the connecting walls, second extension parts are respectively disposed on two sides of the magnet group installation part, one of the first extension parts and one of the second extension parts on a same side as the one of the first extension parts extend in a same direction, and the one of the first extension parts and the one of the second extension parts on the same side as the one of the first extension parts are connected through the elastic connection part.
5. The linear actuating device as claimed in claim 3, wherein the elastic connection part comprises at least one first elastic support part.
6. The linear actuating device as claimed in claim 5, wherein the elastic connection part further comprises a second elastic support part, a number of the first elastic support part is two, the second elastic support part is disposed between the two first elastic support parts, and a thickness of the second elastic support part is greater than a thickness of each of the two first elastic support parts on two sides of the second elastic support part.
7. The linear actuating device as claimed in claim 4, wherein the elastic connecting part comprises two first elastic support parts and a second elastic support part, and the second elastic support part is disposed between the two first elastic support parts; a portion of the first extension part disposed between each of the two first elastic support parts and the second elastic support part, and a portion of the first extension part disposed between the first elastic support part and the respective connecting wall are circular arc-shaped; and a portion of the second extension part disposed between each of the two first elastic support parts and the second elastic support part, and a portion of the second extension part disposed between the first elastic support part and the magnet group installation part are circular arc-shaped.
8. The linear actuating device as claimed in claim 1, wherein an actuating arm is connected to the magnet group installation part, an output shaft is disposed on the actuating arm, and the output shaft is disposed above the installation frame.
9. The linear actuating device as claimed in claim 8, wherein the actuating arm defines a locating hole, a locating protrusion is disposed on the magnet group installation part, when the actuating arm is connected to the magnet group installation part, the locating protrusion is inserted into the locating hole to position the actuating arm; or the actuating arm is integrated with the magnet group installation part into one whole.
10. The linear actuating device as claimed in claim 8 or claim 9, wherein a number of the actuating arm is two, a number of the magnet group installation part is two, the two magnet group installation part are respectively disposed on two sides of the electromagnet installation part, the two actuating arms are respectively disposed on the magnet group installation parts on the two sides of the electromagnet installation part, and free ends of the two actuating arms are arranged in a staggered or opposite manner.
11. A hair cutting device comprising a shell and at least one cutting blade assembly, wherein the linear actuating device as claimed in any one of claims 1-10 is disposed in the shell, the cutting blade assembly is connected to the magnet group installation part, and the cutting blade assembly is configured to move back and forth with the magnet group under a power provided by the magnet group of the linear actuating device.

Description

TECHNICAL FIELD The invention relates to the technical field of linear motors, and more particularly to a linear actuating device and a hair cutting device equipped with the linear actuating device. BACKGROUND A linear actuating device (also referred to as linear actuator) is used to control linear displacement or force. It generates a magnetic field through the principle of electromagnetic induction, and uses this magnetic field to apply force or motion to a load, thereby achieving linear control of the load. In the linear actuating device in the related art, an electromagnet in a stator assembly is arranged in a vertical state, in order to achieve smooth magnetic induction and to drive the load that needs linear motion to move back and forth smoothly, a magnet group in a mover assembly is arranged at a top end of the electromagnet, that is, the mover assembly is located above the stator assembly. At this time, only one magnet pole of the electromagnet faces towards the magnet group in the mover assembly, and the other magnet pole is in a useless state. The magnet group in the mover assembly is located above the magnet pole at the top of the electromagnet, and through a magnetic induction action between the magnet group and the magnet pole at the corresponding end of the electromagnet, the magnet is made to move back and forth, thereby driving the load that needs linear motion (such as a cutting blade assembly in a hair cutting device) to move back and forth. However, the electromagnet itself has a certain height, and when it is arranged vertically, it increases a length of the linear actuating device in a vertical direction, as a result, a product using such the linear actuating device requires more installation space in the vertical direction, increasing the length, and resulting in lower space utilization rate in a horizontal direction. Moreover, due to a longer length in a height direction (which can also be understood as a length direction), a proportion of appearance of the product in the length direction and the horizontal direction is not coordinated, resulting in the appearance of the entire product not being beautiful. SUMMARY The invention aims to solve the aforementioned technical problems in the related art, and provides a linear actuating device which is capable of improving space utilization rate to reduce the volume of the linear actuating device, rationally use the space in a horizontal direction, and improve the beauty of the linear actuating device. Additionally, the invention also provides a hair cutting device equipped with the linear actuating device. In order to solve the aforementioned technical problems, the invention provides the following technical solutions. A linear actuating device provided by the invention includes an installation frame, an electromagnet and a magnet group. The installation frame includes an electromagnet installation part and a magnet group installation part disposed on a side of the electromagnet installation part. The electromagnet is horizontally disposed in the electromagnet installation part, and the magnet group is disposed in the magnet group installation part. After the magnet group is disposed in the magnet group installation part, the magnet group is positioned opposite to a magnet pole of an end of the electromagnet disposed in the electromagnet installation part. The invention provides the linear actuating device. By disposing the installation frame, the electromagnet is horizontally disposed in the electromagnet installation part, and the magnet group is disposed in the magnet group installation part to make the magnet group be positioned opposite to a magnet pole of a corresponding end of the horizontally disposed electromagnet. After alternating current is applied to the electromagnet, the magnet group can be moved back and forth along a direction perpendicular to a central axis of the electromagnet through magnetic induction action between the electromagnet and the magnet group. By arranging the electromagnet horizontally and disposing the magnet group at the side of the electromagnet and opposite to the magnet pole of the electromagnet, the horizontal space can be fully utilized, which greatly reduces a height of the linear actuating device. This reduces a length of a product using the linear actuating device, makes a proportion between the length and a width more coordinated, and enhances the beauty of the appearance of the product. In an embodiment, a number of the magnet group installation part is two, the two magnet group installation parts are respectively disposed on two sides of the electromagnet installation part. A number of the magnet group is two, the two magnet groups are respectively disposed in the two magnet group installation parts, and each magnet group is positioned opposite to a magnet pole of a corresponding electromagnet disposed in the electromagnet installation part. In an embodiment, the magnet group installation part