Beard trimmer

Abstract

A beard trimmer includes a base assembly, a transmission assembly, and a tool bit assembly. The transmission assembly comprises a rotating seat, a cover plate, a flexible plate, a limiting nail, a movable plate, a rotating plate, a driving block, a driven block and a driving rod. The cover plate is provided with a fixing column and a mounting hole. And the center of the rotating plate is rotationally arranged on the fixed column. A strip-shaped groove is formed in the end, facing the rotating base, of the driving block. The two ends of the rotating plate penetrate through the first kidney-shaped holes of the two movable plates correspondingly and are inserted into the second kidney-shaped holes of the driving block and the second kidney-shaped holes of the driven block correspondingly, and when one movable plate moves in a reciprocating mode, the rotating plate is driven to drive the other movable plate to move in a reciprocating mode. The two movable plates can slide in the opposite moving directions at the same time, staggered movement of multiple tool bits is achieved, and the shearing effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of beard trimming devices, in particular to a beard trimmer. Background Art

[0002] A shaver is a cosmetic appliance that uses electric power to drive the blade to cut beards and sideburns. It is mainly divided into two types: rotary and reciprocating. Rotary shavers operate by rotating the center, and the circular motion continuously cuts the beard, which is quiet and comfortable, while reciprocating shavers use the left and right reciprocating motion of the blade head, which has greater vibration and noise, but has a strong shaving force.

[0003] The electric shaver consists of a stainless steel mesh cover, inner blades, a micro motor and a housing. The mesh cover is the fixed outer blade, which has many holes on it, and the beard can be inserted into the holes. The micro motor is driven by electrical energy to drive the inner blade to move, and the beard inserted into the hole is cut off by the shearing principle. The shaver in the prior art is a reciprocating electric shaver disclosed in application number CN202210092634.9, which includes a cutting knife group consisting of an outer knife and an inner knife slidingly contacting along the inner surface of the outer knife, a motor, and a vibrating member driving the inner knife to reciprocate left and right. A power conversion mechanism for converting the motor rotational force into reciprocating power is provided between the vibrating member and the motor. The power conversion mechanism includes an eccentric wheel mounted on the motor output shaft and having an eccentric shaft, a driver directly or indirectly connected to the vibrating member, and the lower part of the driver made of micro-elastic material has a matching groove that is flexible with the eccentric shaft in interference fit. The damping between the matching walls on the left and right sides of the driver matching groove and the eccentric shaft is greater than the friction damping between the inner knife and the outer knife of the cutting knife group, so as to realize power conversion and output reciprocating power to drive the vibrating member. However, the transmission structure in the prior art is directly connected to the inner knife of the cutting knife group through the eccentric shaft, resulting in unstable connection. At the same time, one eccentric shaft drives one cutting knife group to reciprocate, making it difficult to realize the staggered movement of multiple knife heads. Summary of the invention

[0004] In view of this, the present invention provides a beard trimmer to solve the above technical problems.

[0005] A beard trimmer comprises a base assembly, a transmission assembly arranged on the base, and a cutter head assembly arranged on the transmission assembly. The transmission assembly comprises a rotating seat arranged on the base, a cover plate arranged on the rotating seat, a flexible plate arranged on the cover plate, four limiting pins arranged on the cover plate, two movable plates arranged on the cover plate, two rotating plates arranged on the cover plate, a driving block arranged on the movable plate, a driven block arranged on the movable plate, and four driving rods arranged on the movable plate. The flexible plate is provided with four through holes arranged in a straight line, and one end of the cover plate facing the rotating seat is provided with two fixing columns for rotatingly setting the rotating plates, and four mounting holes for setting the limiting pins. The limiting pins are provided with a circle of limiting grooves, and the two ends of the movable plate are respectively provided with positioning grooves, and the positioning grooves are movably clamped on the limiting grooves, and the two ends of the movable plate are respectively provided with first waist-shaped holes. The first waist-shaped hole is located between the positioning groove and the center position of the movable plate, and the center of the rotating plate is rotatably set on the fixing column. The driving block is arranged on one of the movable plates, and a strip groove is arranged at one end of the driving block facing the rotating seat, and the extension direction of the strip groove is perpendicular to the moving direction of the movable plate. The driven block is arranged on the other movable plate, and the two ends of the driving block and the driven block are respectively provided with second waist-shaped holes. The two ends of the rotating plate are respectively passed through the first waist-shaped holes of the two movable plates and are respectively inserted into the second waist-shaped holes of the driving block and the driven block. The four driving rods are respectively arranged on the driving block and the driven block in pairs, one end of the driving rod is inserted in the movable plate, and the other end of the driving rod passes through the through hole of the flexible plate and is inserted into the tool head assembly.

[0006] Furthermore, the base assembly includes a handle, a drive motor disposed on the handle, an eccentric shaft disposed on the drive motor, and a base disposed on the handle.

[0007] Furthermore, one end of the eccentric shaft is a middle shaft end, and the other end is an eccentric end. The middle shaft end of the eccentric shaft is connected to the output end of the driving motor, and the eccentric end of the eccentric shaft is inserted into the strip groove.

[0008] Furthermore, two ends of the rotating seat are rotatably arranged with the base, and an opening is arranged at the bottom of the rotating seat, and the opening is used for passing the driving block.

[0009] Furthermore, the arrangement direction of the two movable plates is parallel to the arrangement direction of the plurality of perforations, and the sliding direction of the movable plate is perpendicular to the arrangement direction of the plurality of perforations.

[0010] Furthermore, the size of the second waist-shaped hole is larger than the size of the first waist-shaped hole.

[0011] Furthermore, the cutter head assembly includes a cutter seat arranged on the rotating seat, two first cutting mechanisms arranged on the cutter seat, and two second cutting mechanisms arranged on the cutter seat.

[0012] Furthermore, the bottom of the knife holder is provided with four slide grooves for providing a moving space for the driving rod, and the driving rod passes through the slide grooves and is inserted into the first cutting mechanism or the second cutting mechanism.

[0013] Furthermore, the two driving rods on one of the movable plates are respectively connected to a first cutting mechanism and a second cutting mechanism, and the two driving rods on the other movable plate are respectively connected to another first cutting mechanism and another second cutting mechanism.

[0014] Compared with the prior art, the beard trimmer provided by the present invention slides the two ends of the two movable plates on the limiting grooves of the limiting pins, so that the movable plates can slide along the positioning grooves. The center of the rotating plate is rotatably arranged on the fixed column, and the two ends of the rotating plate are respectively inserted into the first waist-shaped holes of the two movable plates, so that when one of the movable plates moves back and forth, the rotating plate will drive the other movable plate to move back and forth, so that the two movable plates can slide in opposite directions at the same time, and the staggered movement of the multiple blades can be achieved, thereby improving the shearing effect. The driving block is arranged on one of the movable plates, and the movable plate, the driving block, and the two driving rods are integrally formed, so that the synchronous movement of the three is ensured during movement, the consistency and stability of the movement are improved, and a better transmission effect is achieved. The eccentric end of the eccentric shaft is inserted into the strip groove, and the moving distance of the eccentric shaft in the direction perpendicular to the moving direction of the movable plate is eliminated through the strip groove, so that the driving block will only be driven to move back and forth along the moving direction of the movable plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic structural diagram of a beard trimmer provided by the present invention.

[0016] Figure 2 for Figure 1 Schematic diagram of the exploded structure of a beard trimmer.

[0017] Figure 3 for Figure 1 A schematic structural diagram of a transmission assembly of a beard trimmer.

[0018] Figure 4 for Figure 1A schematic diagram of the exploded structure of a transmission assembly of a beard trimmer.

[0019] Figure 5 for Figure 1 A schematic diagram of the exploded structure of the transmission assembly of the beard trimmer shown at another angle.

[0020] Figure 6 for Figure 1 A schematic diagram of the structure of a beard trimmer with a transmission assembly having a rotating seat removed.

[0021] Figure 7 for Figure 1 A schematic diagram of the exploded structure of a cutter head assembly of a beard trimmer.

[0022] Figure 8 for Figure 1 A schematic structural diagram of a movable plate, a driving block, and a driving rod of a beard trimmer. DETAILED DESCRIPTION

[0023] The specific embodiments of the present invention are further described in detail below. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0024] like Figures 1 to 8 , which is a schematic diagram of the structure of the beard trimmer provided by the present invention. The beard trimmer includes a base assembly 10, a transmission assembly 20 disposed on the base 10, and a cutter head assembly 30 disposed on the transmission assembly 20. It is conceivable that the beard trimmer also includes other functional modules, such as an assembly assembly and a battery assembly, etc., which are well known to those skilled in the art and will not be described in detail here.

[0025] The base assembly 10 includes a handle 11 , a driving motor 12 disposed on the handle 11 , an eccentric shaft 13 disposed on the driving motor 12 , and a base 14 disposed on the handle 10 .

[0026] The handle 11 is used to carry the above-mentioned functional modules. The handle 11 is provided with a variety of functional structures, such as screws, bolts, etc. to complete the installation and assembly of the above-mentioned functional modules. It can be arranged according to actual needs and will not be described in detail one by one here.

[0027] One end of the eccentric shaft 13 is a central axis end, and the other end is an eccentric end. The central axis end of the eccentric shaft 13 is connected to the output end of the drive motor 12, and the eccentric end of the eccentric shaft 13 is inserted into the transmission assembly 20. The drive motor 12 drives the eccentric shaft 13 to rotate while the eccentric end of the eccentric shaft 13 moves in a circular motion.

[0028] The transmission assembly 20 includes a rotating seat 21 arranged on the base 14, a cover plate 22 arranged on the rotating seat 21, a flexible plate 23 arranged on the cover plate 22, four limiting nails 24 arranged on the cover plate 22, two movable plates 25 arranged on the cover plate 22, two rotating plates 26 arranged on the cover plate 22, a driving block 27 arranged on the movable plate 25, a driven block 28 arranged on the movable plate 25, and four driving rods 29 arranged on the movable plate 25.

[0029] The two ends of the rotating seat 21 are rotatably arranged with the base 14, so that the transmission assembly 20 and the cutter head assembly 30 arranged on the transmission assembly 20 can be rotated to rotate according to the fitting position of the beard trimmer, ensuring that the cutter head assembly 30 can fit the skin closely and ensure that no corner is missed during shaving. The bottom of the rotating seat 21 is provided with an opening 211, and the opening 211 is used to pass the driving block 28.

[0030] The cover plate 22 is provided with two fixing posts 221 for rotatably setting the rotating plate 26 and four mounting holes 222 for setting the limiting pins 24 at one end thereof facing the rotating seat 21 .

[0031] The flexible plate 23 is arranged at the center of the cover plate 22. The flexible plate 23 is provided with four through holes 231 arranged in a straight line, and the through holes 231 are used to penetrate the driving rod 29. The flexible plate 23 is made of a flexible material, so as to ensure that the movement of the driving rod 29 is not affected. At the same time, the flexible plate 23 is used to seal between the driving rod 29 and the cover plate 22 to prevent beard residues from falling into the transmission assembly 20 and preventing the normal operation of the transmission from being affected.

[0032] The limiting pins 24 are provided with a circle of limiting grooves 241 , and the four limiting pins 24 are arranged in a rectangular distribution. The two ends of the two movable plates 25 are slidably connected to the two limiting pins 24 , and the arrangement direction of the two movable plates 25 is parallel to the arrangement direction of the plurality of through holes 231 .

[0033] The two ends of the movable plate 25 are respectively provided with positioning grooves 251, and the positioning grooves 251 are movably clamped on the limiting grooves 241, so that the movable plate 25 can slide along the positioning grooves 251. The sliding direction of the movable plate 25 is perpendicular to the arrangement direction of the plurality of through holes 231. The two movable plates 25 are respectively used to drive the driven block 27 and the driving block 28 to move. The two ends of the movable plate 25 are respectively provided with first waist-shaped holes 252, and the first waist-shaped holes 252 are located between the positioning grooves 251 and the center position of the movable plate 25.

[0034] The center of the rotating plate 26 is rotatably arranged on the fixed column 221, and the two ends of the rotating plate 26 are respectively inserted into the first waist-shaped holes 252 of the two movable plates 25, so that when one of the movable plates 25 moves back and forth, it will drive one end of the rotating plate 26 to move in an arc, and the other end of the rotating plate 26 to move in an arc in the opposite direction, thereby driving the other movable plate 25 to move back and forth, and realizing the opposite sliding of the moving directions of the two movable plates 25. In addition, since the rotating plate 26 is a rotational movement, and the movable plate 25 is a horizontal movement, in order to avoid the problem of mutual interference, the first waist-shaped hole 252 has a certain movable space to avoid mutual interference.

[0035] The driving block 27 is arranged on one of the movable plates 25. A strip groove 271 is arranged at one end of the driving block 27 facing the rotating seat 21, and the extending direction of the strip groove 271 is perpendicular to the moving direction of the movable plate 25. The eccentric end of the eccentric shaft 13 is inserted into the strip groove 271, and the moving distance of the eccentric shaft 13 in the direction perpendicular to the moving direction of the movable plate 25 is eliminated by the strip groove 271, so that the driving block 27 is only driven to reciprocate along the moving direction of the movable plate 25. The driven block 28 is arranged on the other movable plate 25. The two ends of the driving block 27 and the driven block 28 are respectively provided with a second waist-shaped hole 281, and the two ends of the rotating plate 26 are respectively passed through the first waist-shaped holes 252 of the two movable plates 25 and inserted into the second waist-shaped holes 281 of the driving block 27 and the driven block 28. The size of the second waist-shaped hole 281 is larger than the size of the first waist-shaped hole 252. Since the driving block 27 and the driven block 28 also move in a straight line, the second waist-shaped hole 281 can further prevent the movement from interfering with each other. The movable plate 25, the driving block 27, and the two driving rods 29 are integrally formed, and the other movable plate 25, the driven block 28, and the other two driving rods 29 are integrally formed. The three can be set together by injection molding or later assembly connection, so as to ensure the synchronous movement of the three during movement, improve the consistency and stability of movement, and have a better transmission effect.

[0036] The four driving rods 29 are respectively arranged on the driving block 27 and the driven block 28 in pairs, one end of the driving rod 29 is inserted in the movable plate 25 and is chamfered, and the other end of the driving rod 29 passes through the through hole 231 of the flexible plate 23 and is inserted into the cutter head assembly 30. The movement of the two movable plates 25 can drive one end of the driving rod 29 to move, thereby driving the other end inserted in the cutter head assembly 30 to swing back and forth, so as to realize the movement of the movable blade in the cutter head assembly 30, and the specific description will be described below in conjunction with the cutter head assembly 30.

[0037] The cutter head assembly 30 includes a cutter seat 31 disposed on the rotating seat 21 , two first cutting mechanisms 32 disposed on the cutter seat 31 , and two second cutting mechanisms 33 disposed on the cutter seat 31 .

[0038] The bottom of the knife holder 31 is provided with four slide grooves 311 for providing a moving space for the driving rod 29. The driving rod 29 passes through the slide grooves 311 and is inserted into the first cutting mechanism 32 or the second cutting mechanism 33. The first cutting mechanism 32 and the second cutting mechanism 33 are used to trim beards or hair. The first cutting mechanism 32 is used to cut longer hair such as long beards, and the second cutting mechanism 33 is used to cut shorter hair such as short beards. Its structure is the same as the blade assembly and cutting unit in the knife head and hair trimmer of the patent application number CN202322096770.8. The beard or hair extending between the moving knife and the static knife is cut by reciprocating movement of the moving knife. Its structure and principle should be the prior art and will not be repeated here. The reciprocating movement of the movable knife is achieved by the reciprocating swinging of the driving rod 29, wherein the two driving rods 29 on one movable plate 25 are respectively connected to a first cutting mechanism 32 and a second cutting mechanism 33, and the two driving rods 29 on another movable plate 25 are respectively connected to another first cutting mechanism 32 and another second cutting mechanism 33, so that one movable plate 25 drives a first cutting mechanism 32 and a second cutting mechanism 33.

[0039] Compared with the prior art, the beard trimmer provided by the present invention slides the two ends of the two movable plates 25 on the limiting grooves 241 of the limiting pins 24, so that the movable plates 25 can slide along the positioning grooves 251. The center of the rotating plate 26 is rotatably arranged on the fixed column 221, and the two ends of the rotating plate 26 are respectively inserted into the first waist-shaped holes 252 of the two movable plates 25, so that when one of the movable plates 25 moves back and forth, the rotating plate 26 will drive the other movable plate 25 to move back and forth, so that the two movable plates 25 can slide in opposite directions at the same time, and the staggered movement of multiple blades can be achieved, thereby improving the shearing effect. The driving block 27 is arranged on one of the movable plates 25, and the movable plate 25, the driving block 27, and the two driving rods 29 are integrally formed, so that the three can move synchronously during movement, improve the consistency and stability of movement, and have a better transmission effect. The eccentric end of the eccentric shaft 13 is inserted into the strip groove 271 , and the strip groove 271 eliminates the moving distance of the eccentric shaft 13 in a direction perpendicular to the moving direction of the movable plate 25 , thereby only driving the driving block 27 to reciprocate along the moving direction of the movable plate 25 .

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. A beard trimmer, characterized in that: The beard trimmer includes a base assembly, a transmission assembly arranged on the base, and a cutter head assembly arranged on the transmission assembly, the transmission assembly includes a rotating seat arranged on the base, a cover plate arranged on the rotating seat, a flexible plate arranged on the cover plate, four limiting nails arranged on the cover plate, two movable plates arranged on the cover plate, two rotating plates arranged on the cover plate, a driving block arranged on the movable plate, a driven block arranged on the movable plate, and four driving rods arranged on the movable plate, the flexible plate is provided with four through holes arranged in a straight line, the cover plate is provided with two fixing columns for rotatably setting the rotating plate, and four mounting holes for setting the limiting nails, the limiting nails are provided with a circle of limiting grooves, and positioning grooves are respectively provided at both ends of the movable plate, and the positioning grooves are movably clamped in On the limiting groove, two ends of the movable plate are respectively provided with a first waist-shaped hole, the first waist-shaped hole is located between the positioning groove and the center position of the movable plate, the center rotation of the rotating plate is set on the fixed column, the driving block is set on one of the movable plates, and the driving block is provided with a strip groove at one end facing the rotating seat, the extension direction of the strip groove is perpendicular to the moving direction of the movable plate, the driven block is set on the other movable plate, and the two ends of the driving block and the driven block are respectively provided with a second waist-shaped hole, the two ends of the rotating plate are respectively passed through the first waist-shaped holes of the two movable plates and are respectively inserted into the second waist-shaped holes of the driving block and the driven block, the four driving rods are respectively arranged on the driving block and the driven block in pairs, one end of the driving rod is inserted in the movable plate, and the other end of the driving rod passes through the through hole of the flexible plate and is inserted into the tool head assembly.

2. The beard trimmer according to claim 1, characterized in that: The base assembly includes a handle, a driving motor arranged on the handle, an eccentric shaft arranged on the driving motor, and a base arranged on the handle.

3. The beard trimmer according to claim 2, characterized in that: One end of the eccentric shaft is a center shaft end, and the other end is an eccentric end. The center shaft end of the eccentric shaft is connected to the output end of the driving motor, and the eccentric end of the eccentric shaft is inserted in the strip groove.

4. The beard trimmer according to claim 1, characterized in that: The two ends of the rotating seat are rotatably arranged with the base, and the bottom of the rotating seat is provided with an opening, and the opening is used for passing the driving block.

5. The beard trimmer according to claim 1, characterized in that: The arrangement direction of the two movable plates is parallel to the arrangement direction of the plurality of through holes, and the sliding direction of the movable plate is perpendicular to the arrangement direction of the plurality of through holes.

6. The beard trimmer according to claim 1, characterized in that: The size of the second waist-shaped hole is larger than that of the first waist-shaped hole.

7. The beard trimmer according to claim 1, characterized in that: The cutter head assembly comprises a cutter seat arranged on the rotating seat, two first cutting mechanisms arranged on the cutter seat, and two second cutting mechanisms arranged on the cutter seat.

8. The beard trimmer according to claim 7, characterized in that: The bottom of the knife seat is provided with four sliding grooves for providing a moving space for the driving rod, and the driving rod passes through the sliding grooves and is inserted into the first cutting mechanism or the second cutting mechanism.

9. The beard trimmer according to claim 7, characterized in that: The two driving rods on one of the movable plates are respectively connected to a first cutting mechanism and a second cutting mechanism, and the two driving rods on the other movable plate are respectively connected to another first cutting mechanism and another second cutting mechanism.

10. The beard trimmer according to claim 1, characterized in that: The movable plate, the driving block, and the two driving rods are integrally formed, and the other movable plate, the driven block, and the other two driving rods are integrally formed.

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