CN220446523U - Cutting assembly capable of reducing noise and hair trimmer - Google Patents

Abstract

The application discloses but shear component and hair trimmer of noise reduction, wherein, shear component includes: a base; the shearing module comprises two shearing cutter bodies, the two shearing cutter bodies can move relatively along a first direction to realize shearing, the shearing module is movably connected with the base to reciprocate along a second direction, the first direction is intersected with the second direction, and the shearing module is provided with a matching part; and the limiting piece is fixed with the base, at least part of the limiting piece is provided with a buffer structure, the matching part can be abutted with the buffer structure so as to limit the shearing module to be separated from the base in the second direction, and noise generated when the shearing assembly moves along the second direction is reduced.

Description

Cutting assembly capable of reducing noise and hair trimmer

Technical Field

The present application relates to the field of hair trimmers, and more particularly, to a cutting assembly capable of reducing noise and a hair trimmer.

Background

The hair trimmer cuts beard or hair by driving the cutter to move, the cutter is arranged in a floatable structure to more conform to the body surface contour of a user, and the floating amplitude of the cutter can be controlled by arranging the limiting structure. But the cutter produces the noise easily when contacting with limit structure, influences user experience.

The foregoing is merely provided to facilitate an understanding of the principles of the present application and is not admitted to be prior art.

Disclosure of Invention

The main objective of the present application is to provide a cutting assembly and a hair trimmer capable of reducing noise, which aims to solve the technical problem of loud noise when the cutting assembly floats in the traditional hair trimmer.

To achieve the above object, a shear assembly capable of reducing noise according to the present application includes:

a base;

the shearing module comprises two shearing cutter bodies, the two shearing cutter bodies can move relatively along a first direction to realize shearing, the shearing module is movably connected with the base to reciprocate along a second direction, the first direction is intersected with the second direction, and the shearing module is provided with a matching part; the method comprises the steps of,

and the limiting piece is fixed with the base, at least part of the limiting piece is provided with a buffer structure, and the matching part can be abutted with the buffer structure so as to limit the shearing module to be separated from the base in the second direction.

In some embodiments of the present application, the limiting member includes a main body portion and a limiting portion, the main body portion being disposed around the shear module; the limiting part is arranged on the annular end face of the main body part, and the limiting part is arranged as the buffer structure.

In some embodiments of the present application, the main body portion includes an annular body and a plurality of protruding portions, the plurality of protruding portions are distributed at intervals along a circumferential direction of the annular body, one end of each protruding portion is connected with an end face of the annular body, and the other end of each protruding portion abuts against the base;

the limiting part is arranged at one end of the annular body facing the base, and two opposite ends of the limiting part are correspondingly contacted with the two convex parts.

In some embodiments of the present application, the plurality of convex parts includes a first convex part and a plurality of second convex parts, and at least part of two adjacent second convex parts are provided with one first convex part;

the limiting parts are positioned between two adjacent second convex parts, the limiting parts are provided with avoiding gaps corresponding to the first convex parts, and the first convex parts are positioned in the avoiding gaps.

In some embodiments of the present application, the limiting portion is a soft rubber member, the main body portion is a hard rubber member, and the limiting portion and the main body portion are integrally injection molded.

In some embodiments of the present application, a thickness of the buffer structure along the second direction is greater than or equal to 1mm.

In some embodiments of the present application, the shearing module further comprises a bracket fixed to a side of the shearing blade, the bracket extending in the first direction, the bracket being provided with a lug protruding in a direction away from the shearing blade, the lug forming the mating portion.

In some embodiments of the present application, the shearing module has an elongated structure in the first direction, and two opposite long sides of the shearing module are respectively provided with the matching parts; the two buffer structures are correspondingly arranged, and the two buffer structures are distributed on two opposite sides of the shearing module along the short sides of the shearing module.

In some embodiments of the present application, the shearing assembly further comprises a housing, the housing is formed with an accommodating space and an opening communicated with the accommodating space, the opening is formed in the second direction, the limiting piece and the base are arranged in the accommodating space and distributed in the second direction, the limiting piece is close to the opening, and the shearing module is at least partially protruded out of the opening.

The embodiment of the application also provides a hair trimmer, which comprises a driving device and a shearing assembly, wherein an output shaft of the driving device is connected with the shearing blade body so as to drive at least one shearing blade body to reciprocate along the first direction.

According to the technical scheme, at least one part of the limiting piece is arranged to be of the buffer structure, after the shearing module moves a certain distance along the second direction, the matching part on the shearing module can be abutted against the buffer structure, so that the shearing module is limited to move continuously in the second direction, and the shearing module is prevented from being separated from the base relatively in the second direction. Because the limited part of the matching part butt with the shearing module is set as the buffer structure, the buffer structure is softer and has better elastic deformation, when the matching part butt of the shearing module is on the buffer structure, the buffer structure can generate certain elastic deformation to buffer the collision of the matching part, the kinetic energy generated by the collision can be absorbed, and the noise is reduced. Meanwhile, after the buffer structure absorbs vibration generated by collision, the vibration can be reduced and transmitted to other parts of the limiting piece and other structures connected with the limiting piece, so that noise is further reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a hair trimmer in an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of the hair trimmer of FIG. 1;

FIG. 3 is another schematic cross-sectional view of the hair trimmer of FIG. 1;

FIG. 4 is a schematic view of a portion of the structure of the hair trimmer of FIG. 1;

fig. 5 is a schematic view of a part of the structure of the hair trimmer of fig. 1 seen from a second direction;

FIG. 6 is a schematic view of the shear module of FIG. 1;

FIG. 7 is a schematic view of a portion of the housing and stop member of FIG. 1;

FIG. 8 is a schematic view of the stopper shown in FIG. 7;

FIG. 9 is a schematic view of the stopper shown in FIG. 8 at another angle;

FIG. 10 is an exploded view of the stop member of FIG. 8;

fig. 11 is a schematic view of a portion of the shear assembly of fig. 1.

Reference numerals illustrate:

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that, in the description of the present application, if the terms "first," "second," and the like are used merely for convenience in describing different components or names, they should not be construed as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" is present throughout, it is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme where a and B meet at the same time.

Referring to fig. 1 in combination, a cutting assembly 100 is provided in an embodiment of the present application, and the cutting assembly 100 can be applied to a hair trimmer for trimming hair.

In order to be able to more conform to the surface contour of an object to be trimmed, such as a human body, the trimming effect is improved, and thus the trimming module 20 of the trimming assembly 100 is configured as a movable structure that can be moved closer to and farther away from the object to be trimmed, i.e., the trimming module 20 can reciprocate in a second direction, which is a direction approaching or moving away from the object to be trimmed. Taking the object to be trimmed as a human beard as an example, the second direction may refer to the up-down direction.

Referring to fig. 4 in combination, typically, the shear assembly 100 is further provided with a stop 30 to control the amplitude of movement of the shear module 20 in the second direction. However, the shearing assembly 100 is easy to generate noise when contacting the limiting member 30, which affects the user experience. The reason for this is that the conventional stopper 30 is made of a hard material, such as metal or hard rubber, and when the shear assembly 100 collides with the hard material, a large collision sound or scratch sound occurs.

Referring to fig. 2 to 5 in combination, a shear assembly 100 according to an embodiment of the present application includes: the base 10, the shearing module 20 and the limiting piece 30, the shearing module 20 includes two shearing cutter bodies, the two shearing cutter bodies can relatively move along a first direction to realize shearing, the shearing module 20 is movably connected with the base 10 so as to reciprocate along a second direction, the first direction is intersected with the second direction, and the shearing module 20 is provided with a matching part 23 (shown in fig. 6). The limiting piece 30 is fixed relative to the base 10, at least part of the limiting piece 30 is provided with a buffer structure, and the matching part 23 can be abutted with the buffer structure so as to limit the shearing module 20 to be separated relative to the base 10 in the second direction.

According to the technical scheme, at least one part of the limiting piece 30 is set to be of the buffer structure, after the shearing module 20 moves a certain distance along the second direction, the matching part 23 on the shearing module 20 can be abutted against the buffer structure, so that the shearing module 20 is limited to move continuously in the second direction, and the shearing module 20 is prevented from being separated from the base 10 in the second direction. Because the part which is in butt joint with the matching part 23 of the shearing module 20 is arranged into a buffer structure, the buffer structure is softer and has better elastic deformation, when the matching part 23 of the shearing module 20 is in butt joint with the buffer structure, the buffer structure can generate certain elastic deformation to buffer the collision of the matching part 23, the kinetic energy generated by the collision can be absorbed, and the noise is reduced. Meanwhile, after the buffer structure absorbs the vibration generated by collision, the vibration can be reduced and transmitted to other parts of the limiting piece 30 and other structures connected with the limiting piece 30, so that the noise is further reduced.

Optionally, the first direction is perpendicular to the second direction, or the first direction forms an included angle smaller than 90 ° with the second direction.

Referring to fig. 8 to 10 in combination, in some embodiments, the limiting member 30 includes a main body 31 and a limiting portion 32, the main body 31 is disposed around the shear module 20, the limiting portion 32 is disposed on an annular end surface of the main body 31, and the limiting portion 32 is configured as a buffer structure. Since the body portion 31 is disposed around the shear module 20, the body portion 31 has a ring-like structure, such as a closed loop or a non-closed loop. The body 31 is wrapped around the shear module 20, with the circumference of the body 31 intersecting a second direction, such as both perpendicular or approximately perpendicular, or with the circumference of the body 31 at a 70 ° or other angle to the second direction. When the circumferential direction of the main body 31 is perpendicular or approximately perpendicular to the second direction, which corresponds to the fact that the shear module 20 reciprocates in the main body 31 substantially along the central axis of the main body 31, the second direction may be regarded as being parallel or substantially parallel to the central axis of the main body 31, and the main body 31 may also play a certain limiting role on the shear module 20, so as to reduce the vibration amplitude of the shear module 20 in the direction perpendicular to the second direction. In the present embodiment, the circumferential direction of the main body portion 31 is parallel to the first direction.

In the embodiment of the present application, the whole circle of end surface of the main body 31 may be covered by the limiting portion 32, that is, the limiting portion 32 is in a closed-loop structure; alternatively, only part of the end surface of the main body 31 is covered with the stopper 32, and thus the stopper 32 may be provided in a long strip shape.

Specifically, in some embodiments, the main body 31 includes an annular body 311 and a plurality of protrusions 312, the plurality of protrusions 312 are distributed at intervals along the circumferential direction of the annular body 311, one end of the protrusions 312 is connected to an end surface of the annular body 311, and the other end of the protrusions 312 abuts against the base 10 (as shown in fig. 4). The limiting portion 32 is disposed on a side of the annular body 311 facing the base 10, one end of the limiting portion 32 contacts one of the protruding portions 312, and the other end of the limiting portion 32 contacts the other protruding portion 312. In the present embodiment, the second direction refers to the direction in which the base 10 points to the annular body 311. The stopper 32 extends between the two protrusions 312, is formed in a long strip shape, and can be mounted, positioned, and stopped by being in contact with the two protrusions 312.

In some embodiments, when the other end of the protrusion 312 abuts against the base 10, the annular body 311 and the base 10 are disposed at intervals in the second direction, and the intervals form spaces for the shear module 20 to reciprocate, so that when the shear module 20 moves to a certain distance along the second direction, the shear module can abut against the buffer structure on the annular body 311 to limit the shear module 20 from continuing to move in the second direction. When the shear module 20 moves a certain distance in the opposite direction of the second direction, it can abut against the base 10 or other structure disposed adjacent to the base 10 to limit the shear module 20 from continuing to move in the opposite direction of the second direction.

In some embodiments, the plurality of protrusions 312 includes a first protrusion 3121 and a plurality of second protrusions 3122, with one first protrusion 3121 disposed between at least a portion of two adjacent second protrusions 3122; the limiting portion 32 is located between two adjacent second protruding portions 3122, and the limiting portion 32 is provided with an avoidance gap 321 corresponding to the first protruding portion 3121, and the first protruding portion 3121 is located at the avoidance gap 321. By forming the avoidance notch 321 in the limiting portion 32, not only the first protruding portion 3121 can be avoided, but also the limiting portion 32 can be positioned and mounted by utilizing the engagement relationship between the first protruding portion 3121 and the avoidance notch 321, and the limiting portion 32 can be limited to move along the circumferential direction of the annular body 311. Further, providing a plurality of protruding portions 312 enables a plurality of support points to be formed in the circumferential direction, and can improve the support stability to the annular body 311.

Of course, in other embodiments, the limiting portion 32 may be disposed between the adjacent first protruding portion 3121 and second protruding portion 3122, or the limiting portion 32 may not contact the first protruding portion 3121 and second protruding portion 3122.

Referring to fig. 4 and 9 in combination, further, the plurality of protruding portions 312 further includes a third protruding portion 3123, and the third protruding portion 3123 is fixed to the base 10 by a fastener 40. The fastener 40 may be a screw or pin or rivet, or the like. In some embodiments, the shearing module 20 has an elongated structure in a direction perpendicular to the second direction, the annular body 311 is correspondingly shaped like a racetrack, the plurality of protrusions 312 includes two third protrusions 3123, the two third protrusions 3123 are distributed on two short sides of the annular body 311, and the first protrusions 3121 and the second protrusions 3122 are distributed on the long sides of the annular body 311. Alternatively, two first protrusions 3121 and one second protrusion 3122 are provided for each long side of the annular body 311. Accordingly, the stopper 32 is provided on the long side of the annular body 311.

In some embodiments, the limiting portion 32 extends along the circumferential direction of the main body portion 31 to be long, so that the coverage area in the circumferential direction is large, and even when the shear module 20 swings in the length direction of the limiting portion 32, the engaging portion 23 is not caused to pass over the limiting portion 32 in the length direction of the limiting portion 32 and contact the main body portion 31. In addition, when the shear module 20 is provided with the plurality of mating portions 23 along the circumferential direction thereof, the plurality of mating portions 23 may share one limiting portion 32 without providing one limiting portion 32 for each mating portion 23, which corresponds to a reduction in the number of limiting portions 32, an increase in size, and a reduction in the number of assembly times and difficulty.

In some embodiments, two opposite sides of the limiting portion 32 are flush with the inner and outer peripheral surfaces of the main body portion 31, respectively. The inner peripheral surface and the outer peripheral surface of the main body 31 are respectively connected to the end surfaces, and the inner peripheral surface is disposed facing the shear module 20. One side surface of the stopper 32 is flush with the inner peripheral surface, and the other side surface of the stopper 32 is flush with the outer peripheral surface, whereby the stopper 32 does not protrude outside the main body 31 in a direction perpendicular to the second direction, and thus does not hinder the reciprocation of the shear module 20 in the second direction. At the same time, the risk that the limit part 32 falls off due to collision of other objects can be reduced.

Referring to fig. 8 in combination, in some embodiments, the thickness B of the limiting portion 32 along the second direction is greater than or equal to 1mm, so that the limiting portion 32 has a larger thickness, which can achieve better buffering and noise reduction effects. Of course, the thickness of the limiting portion 32 is not limited in the embodiment of the present application.

In some embodiments, the main body 31 is made of hard plastic, so the main body 31 has high strength and hardness, and can better support and fix the limiting part 32. In addition, when the main body 31 is fixed to the base 10, the harder main body 31 can also secure the connection strength with the base 10.

Specifically, the main body 31 may be made of ABS, PC, or a mixture of ABS, PC and PTE, or the like.

The cushioning structure refers to a structure having a superior cushioning property, typically having an elastic property. In some embodiments, the cushioning structure is a soft gel, such as a thermoplastic elastomer (TPE) or silicone, or the like. Of course, the cushioning structure may also be a sponge.

In some embodiments, the stop 32 is integrally injection molded with the body 31. When the main body 31 and the limiting part 32 are both plastic structures, they can be integrally injection molded by using a bicolor mold. When the main body 31 is of a metal structure, the limiting portion 32 may be integrally injection molded on the main body 31. In addition, the stopper portion 32 and the main body portion 31 may be bonded or fastened.

In some embodiments, the shear module 20 has an elongated structure in the first direction, and two opposite long sides of the shear module 20 are respectively provided with a mating portion 23; the buffer structure corresponds to be set up to two, and two buffer structures distribute at the opposite sides of shearing module 20 along the minor face of shearing module 20, consequently the opposite sides of shearing module 20 all can be spacing, and shearing module 20 atress is more balanced, can prevent that shearing module 20 from turning on one's side. The long sides of the shearing module 20 extend along a first direction, and the short sides of the shearing module 20 are perpendicular to the first direction and the second direction respectively.

Referring to fig. 6 again, in the above description, the engaging portion 23 may be a lug or a bump. In some embodiments, the shear module 20 comprises a shear blade and a support 22 for mounting the shear blade, the support 22 being arranged in a first direction along the circumference of the shear blade, the support 22 being provided with lugs to form mating portions 23, the lugs projecting in a direction away from the shear blade. The holder 22 may be provided in one turn in the circumferential direction of the shear blade, or the holder 22 may be provided only at a part of the shear blade. The support 22 may be a unitary structure or may be detachably assembled from a plurality of separate structures. The provision of the support 22 allows for the mounting of the shear blade to other structures such as the base 10. The bracket 22 can be made of metal, and the lug is formed by integrally bending the bracket 22, so that the bracket has higher strength.

Referring to fig. 2 in combination, further, the shear assembly 100 further includes a housing 50, the housing 50 is formed with an accommodating space 51 and an opening 52 communicating with the accommodating space 51, the opening 52 is opened along a second direction, the base 10 and the limiting members 30 are disposed in the accommodating space 51 and distributed along the second direction, the limiting members 30 are disposed near the opening 52, the shear module 20 at least partially protrudes out of the opening 52 and can reciprocate in the opening 52, and after moving out of the opening 52, the mating portion 23 can abut against the buffer structure to limit the shear assembly 100 from disengaging out of the opening 52. The second direction is thus referred to as the opening 52 direction. The shear module 20 may reciprocate within the opening 52 in the second direction so that the projection height of the shear module 20 outside the opening 52 may be varied to more closely conform to the body surface contour of the user. When the body surface of the user abuts the shear module 20, the shear module 20 can be pressed down into the opening 52; when the shear module 20 is not pressed by the body surface of the user, the shear module 20 can move outside the opening 52.

Of course, in other embodiments, the second direction may also refer to a direction in which the opening 52 points into the accommodating space 51, so the buffer structure may limit the distance that the shear module 20 moves into the opening 52.

Referring to fig. 2, 7 and 9, further, the main body 31 is further fixed to the housing 50, for example, the fastener 40 may be simultaneously inserted through the third protrusion 3123 of the main body 31, the housing 50 and the base 10, thereby fixing the three. Alternatively, the body portion 31 is in contact with the inner wall of the housing 50, i.e. the body portion 31 is disposed along the inner wall of the housing 50.

In addition, the stopper 30 may be a part of the housing 50, for example, the main body 31 of the stopper 30 and the housing 50 may be integrally formed.

The housing 50 may be in one unitary housing or the housing 50 may be formed from a combination of multiple sub-housings, such as in fig. 1, the housing 50 being formed from a combination of two sub-housings distributed along the second direction. In some embodiments, the second direction refers to a bottom-up direction.

Referring again to fig. 2, further, some guiding structures may be disposed between the shear module 20 and the base 10 to guide the shear module 20 to reciprocate in the second direction relative to the base 10. For example, the shear module 20 is provided with a guide hole 24, the base 10 is provided with a guide post 11, and the guide post 11 is movably fitted with the guide hole 24 in the second direction, so that the shear module 20 can move up and down along the guide post 11.

Further, a resilient structure 12 may be provided between the shear module 20 and the base 10 to reset the shear module 20 in the second direction. For example, the elastic structure 12 is a spring that is sleeved on the guide post 11, and is compressed when the shear module 20 is pressed by a user to move in the opposite direction of the second direction. When the pressing force is lost or reduced, the spring gradually returns to elastic deformation, and the shear module 20 is lifted up in the second direction. The shear module 20 may thus create a resilient float to more closely conform to the body surface characteristics.

The embodiments of the present application also provide a hair trimmer, which may specifically be a shaver, a hair clipper, a hair trimmer, etc., and is not specifically limited herein. Referring to fig. 1 and 11 in combination, the hair trimmer includes a driving device 60 and a cutting assembly 100, and the specific structure of the cutting assembly 100 is shown in the above embodiment, which is not repeated here.

Wherein an output shaft of the driving device 60 is connected to the shearing module 20 of the shearing assembly 100 to be capable of driving at least one shearing blade to reciprocate in the first direction.

Referring to fig. 3 in combination, specifically, one of the shearing cutter bodies is a movable cutter head 25, the other shearing cutter body is a static cutter head 26, and the driving device 60 is connected with the movable cutter head 25 to drive the movable cutter head 25 to reciprocate in a first direction relative to the static cutter head 26, so that the movable cutter head 25 and the static cutter head 26 can cut hair. Alternatively, the two shearing cutter bodies are movable cutter heads 25, and the two movable cutter heads 25 reciprocate in opposite directions respectively to realize shearing.

The driving device 60 may be disposed in the receiving space 51 of the housing 50 and located at a side of the base 10 facing away from the stopper 30. The driving device 60 may be a linear actuator or other device capable of generating a driving force.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A noise-reducing shear assembly, comprising:

a base;

the shearing module comprises two shearing cutter bodies, the two shearing cutter bodies can move relatively along a first direction to realize shearing, the shearing module is movably connected with the base to reciprocate along a second direction, the first direction is intersected with the second direction, and the shearing module is provided with a matching part; the method comprises the steps of,

and the limiting piece is fixed with the base, at least part of the limiting piece is provided with a buffer structure, and the matching part can be abutted with the buffer structure so as to limit the shearing module to be separated from the base in the second direction.

2. The shear assembly of claim 1, wherein the stop comprises a body portion and a stop portion, the body portion disposed about the shear module; the limiting part is arranged on the annular end face of the main body part, and the limiting part is arranged as the buffer structure.

3. The shear assembly of claim 2, wherein said main body portion comprises an annular body and a plurality of projections spaced apart circumferentially of said annular body, one end of said projections being connected to an end face of said annular body, the other end of said projections abutting said base;

the limiting part is arranged at one end of the annular body facing the base, and two opposite ends of the limiting part are correspondingly contacted with the two convex parts.

4. A shear assembly according to claim 3, wherein a plurality of said projections comprises a first projection and a plurality of second projections, at least a portion of two adjacent ones of said second projections being disposed with one of said first projections therebetween;

the limiting parts are positioned between two adjacent second convex parts, the limiting parts are provided with avoiding gaps corresponding to the first convex parts, and the first convex parts are positioned in the avoiding gaps.

5. The shear assembly of claim 2, wherein the stop portion is a soft gel piece and the body portion is a hard gel piece, the stop portion being integrally injection molded with the body portion.

6. The shear assembly of claim 1, wherein the thickness of the cushioning structure in the second direction is greater than or equal to 1mm.

7. The shear assembly of claim 1, wherein the shear module further comprises a bracket secured to a side of the shear blade, the bracket extending in the first direction, the bracket being provided with a tab projecting away from the shear blade, the tab forming the mating portion.

8. The shear assembly of claim 1, wherein the shear module has an elongated configuration in the first direction, the mating portions being provided on two opposing long sides of the shear module, respectively; the two buffer structures are correspondingly arranged, and the two buffer structures are distributed on two opposite sides of the shearing module along the short sides of the shearing module.

9. A shear assembly as claimed in any one of claims 1 to 8, further comprising a housing defining a receiving space and an opening in communication with the receiving space, the opening being open in the second direction, the stop and the base being disposed in the receiving space and distributed in the second direction, the stop being disposed adjacent the opening, the shear module at least partially protruding out of the opening.

10. A hair trimmer according to any one of claims 1 to 9 including drive means and a cutting assembly, the output shaft of said drive means being connected to said cutting blade body to enable reciprocating movement of at least one of said cutting blade bodies in said first direction.