Positioning pin mounting structure of electric hair cutter adjusting wrench

Abstract

The utility model discloses a positioning pin mounting structure of an electric hair cutter adjusting wrench, which comprises the adjusting wrench, a mounting hole is arranged on one side of the adjusting wrench close to an electric hair cutter body, and a positioning pin component is inserted in the mounting hole. The positioning pin assembly comprises a positioning sleeve fixedly inserted into the mounting hole, a positioning pin movably inserted into the positioning sleeve and a compression spring arranged on the peripheral side of the positioning pin in a sleeving mode, and the compression spring enables the positioning pin to have the trend of moving towards the direction of the electric hair cutter body all the time; a limiting mechanism is arranged between the positioning pin and the positioning sleeve so as to prevent the positioning pin from disengaging from the positioning sleeve under the elastic acting force of the compression spring. The positioning pin is driven by the elastic acting force of the compression spring to always have the movement trend of being separated from the positioning sleeve, but due to the arrangement of the limiting mechanism, the positioning pin cannot be separated from the positioning sleeve. According to the structural design, the risk of structural failure caused by the fact that the plug is separated from the mounting hole in the prior art is avoided, and the product reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric hair clippers, in particular to a positioning pin installation structure of an adjusting wrench of an electric hair clipper. Background Art

[0002] The existing electric hair clipper includes a body and a cutter head assembly, which is installed at the front end of the body. The cutter head assembly includes a base plate, a fixed blade holder, a movable blade holder, a fixed blade and a movable blade. The base plate is installed at the front end of the body, the fixed blade is fixedly connected to the fixed blade holder, and the movable blade is limitedly inserted into the movable blade holder or fixedly connected to the movable blade holder.

[0003] In order to enable the electric hair clippers to change the front-to-back distance between the fixed blade and the movable blade during use, thereby achieving the effect of controlling the hair cutting length, a wrench adjustment mechanism is generally provided on the electric hair clippers. For the specific structure and principle of the existing wrench adjustment mechanism, please refer to a gear adjustment mechanism disclosed in the Chinese utility model patent (Announcement No.: CN213106940U), which rotates the adjustment wrench to make the gear lever rotate along with the adjustment wrench. Since the movement trajectory of the gear lever is not an arc shape, the push rod connected to the adjustment wrench pushes the lower blade holder to move forward and backward when the adjustment wrench is rotated, thereby causing the fixed blade fixedly connected to the lower blade holder to move forward and backward, thereby changing the front-to-back distance between the fixed blade and the movable blade, thereby achieving the effect of controlling the hair cutting length.

[0004] Common installation methods of the gear lever in the prior art are as follows Figure 1 As shown, the adjusting wrench 100 is provided with a positioning hole 101 on the side close to the fuselage, and the gear lever 200 includes a first rod portion 201, a convex ring 202 and a second rod portion 203. The diameter of the convex ring 202 is larger than the diameters of the first rod portion 201 and the second rod portion 203. A compression spring 300 is sleeved on the outside of the first rod portion 201 and inserted into the positioning hole 101. A plug 400 is movably sleeved on the outside of the second rod portion 203. The plug 400 is tightly fitted with the positioning hole 101. One end of the compression spring 300 abuts against the convex ring 202, and the other end abuts against the bottom of the positioning hole 101. The compression spring 300 is used to drive the gear lever 200 to move in the direction of extending out of the plug 400.

[0005] In the above-described installation method of the shift lever 200, the elastic force of the compression spring 300 causes the shift lever 200 to constantly move out of the positioning hole 101. The shift lever 200 is prevented from moving out of the shift hole 101 only by the blocking action of the plug 400. Therefore, the plug 400 constantly bears the elastic force of the compression spring 300, and under the continuous elastic force, there is a risk of the plug 400 moving out of the positioning hole 101. If the plug 400 moves out of the positioning hole 101 under the continuous elastic force of the compression spring 300, the shift lever 200 will also move out of the positioning hole 101 due to the loss of the blocking action of the plug 400, rendering the installation structure of the shift lever 200 ineffective.

[0006] Therefore it is necessary to improve the existing technology. Utility Model Content

[0007] The purpose of the utility model is to solve the problem in the prior art that the plug always bears the elastic force of the compression spring in a transmission manner, and there is a risk that the plug will fall out of the positioning hole under the continuous elastic force. When the plug falls out of the positioning hole under the continuous elastic force of the compression spring, the gear lever will also fall out of the positioning hole due to the loss of the stopping effect of the plug, making the installation structure of the gear lever invalid. A positioning pin installation structure for the electric hair clipper adjustment wrench is proposed.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A locating pin mounting structure for an electric hair clipper adjusting wrench comprises an adjusting wrench, a mounting hole being provided on a side of the adjusting wrench close to a body of the electric hair clipper, a locating pin assembly being inserted into the mounting hole, the locating pin assembly comprising a locating sleeve fixedly inserted into the mounting hole, a locating pin movably inserted into the locating sleeve, and a compression spring sleeved on the outer peripheral side of the locating pin, one end of the compression spring abuts against the locating sleeve, and the other end of the compression spring abuts against the locating pin, so that the locating pin always has a tendency to move toward the body of the electric hair clipper and one end of the locating pin protrudes from the locating sleeve; a limiting mechanism is provided between the locating pin and the locating sleeve to limit the locating pin from coming out of the locating sleeve under the elastic force of the compression spring.

[0010] Furthermore, the positioning sleeve includes a first end located at the bottom of the mounting hole and a second end located at the mounting hole mouth. The peripheral wall of the positioning sleeve is provided with at least two slits along the circumferential direction. The slits extend from the second end of the positioning sleeve toward the first end, pass through the first end of the positioning sleeve, and end at the second end of the positioning sleeve.

[0011] Furthermore, at least two of the slits divide the first end of the positioning sleeve into at least two positioning pieces, and the limiting mechanism includes a protrusion arranged on the inner circumference of the positioning piece and extending toward the axis of the positioning sleeve, and a conical head arranged at one end of the positioning pin; the protrusions of at least two positioning pieces are located on the same circumference, and the conical head is inserted into the center hole surrounded by the protrusions, and cooperates with the protrusions to limit the positioning pin from falling out of the positioning sleeve.

[0012] Furthermore, the cone head includes a small head end with a smaller diameter close to the bottom of the positioning sleeve, and a large head end with a larger diameter away from the bottom of the positioning sleeve; and the diameter of the large head end of the cone head is larger than the aperture of the center hole surrounded by the protrusions.

[0013] Furthermore, the other end of the positioning pin is provided with a gear head, and the gear head is provided with a convex ring. One end of the compression spring abuts against the convex block, and the other end of the spring abuts against the convex ring.

[0014] Furthermore, the gear head is in the shape of a ball head.

[0015] Furthermore, there are two slits, and the two slits are arranged opposite to each other.

[0016] Furthermore, a step groove is provided on the inner circumference of the mouth of the mounting hole, and a step portion cooperating with the step groove is provided on the outer circumference of the mouth of the positioning sleeve.

[0017] After adopting the above structure, the beneficial effects of the utility model are as follows: the locating pin installation structure of the electric hair clipper adjusting wrench described in the utility model includes an adjusting wrench, and a mounting hole is provided on the side of the adjusting wrench close to the electric hair clipper body, and a locating pin assembly is inserted in the mounting hole, and the locating pin assembly includes a locating sleeve fixedly inserted in the mounting hole, a locating pin movably inserted in the locating sleeve, and a compression spring sleeved on the outer peripheral side of the locating pin, one end of the compression spring abuts against the locating sleeve, and the other end of the compression spring abuts against the locating pin, so that the locating pin always has a tendency to move toward the direction of the electric hair clipper body, and one end of the locating pin protrudes from the locating sleeve; a limiting mechanism is provided between the locating pin and the locating sleeve to limit the locating pin from escaping from the locating sleeve under the elastic force of the compression spring. The positioning sleeve of this utility model is fixedly inserted into the mounting hole. One end of the compression spring abuts the positioning sleeve, and the other end of the compression spring abuts the positioning pin. Driven by the elastic force of the compression spring, the positioning pin always has a tendency to move out of the positioning sleeve. However, the provision of a limiting mechanism prevents the positioning pin from falling out of the positioning sleeve. This structural design avoids the risk of the plug falling out of the positioning hole and causing structural failure in the prior art, thereby improving product reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention, the following will briefly introduce the drawings required for use in the description of the specific implementation methods. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a cross-sectional view of the gear lever mounting structure in the prior art;

[0020] Figure 2 yes Figure 1 A magnified schematic diagram of the structure at A;

[0021] Figure 3 It is a cross-sectional view of the overall structure of the utility model;

[0022] Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at B;

[0023] Figure 5 It is an exploded view of the overall structure of the utility model;

[0024] Figure 6 This is an exploded view of the positioning pin assembly of the utility model;

[0025] Figure 7 It is a three-dimensional schematic diagram of the positioning pin of the utility model;

[0026] Figure 8 It is a three-dimensional schematic diagram of the positioning sleeve of the utility model;

[0027] Figure 9 It is a sectional view of the adjusting wrench of the present utility model.

[0028] Figures 1 to 9 The winning bid number is:

[0029] 1. Adjusting wrench; 2. Mounting hole; 21. Step groove; 3. Locating pin assembly; 31. Locating sleeve; 311. First end; 312. Second end; 313. Slit; 314. Locating piece; 3141. Bump; 315. Step portion; 32. Locating pin; 321. Conical head; 3211. Small head end; 3212. Large head end; 322. Shift head; 3221. Raised ring; 33. Compression spring; 100. Adjusting wrench; 101. Locating hole; 200. Shift lever; 201. First lever portion; 202. Raised ring; 203. Second lever portion; 300. Compression spring; 400. Plug. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] Furthermore, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0033] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," etc., should be understood in a broad sense. For example, they can refer to fixed connection, removable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediary; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0034] In this utility model, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, "above," "above," and "above" a first feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this utility model are for illustrative purposes only and do not represent the only embodiment.

[0036] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] like Figures 1 to 9 As shown, a locating pin mounting structure of an electric hair clipper adjusting wrench includes an adjusting wrench 1, a mounting hole 2 is provided on the side of the adjusting wrench 1 close to the electric hair clipper body, a locating pin assembly 3 is inserted in the mounting hole 2, the locating pin assembly 3 includes a locating sleeve 31 fixedly inserted in the mounting hole 2, a locating pin 32 movably inserted in the locating sleeve 31 and a compression spring 33 sleeved on the outer peripheral side of the locating pin 32, one end of the compression spring 33 abuts against the locating sleeve 31, and the other end of the compression spring 33 abuts against the locating pin 32, so that the locating pin 32 always has a tendency to move toward the electric hair clipper body, and one end of the locating pin 32 protrudes from the locating sleeve 31; a limiting mechanism is provided between the locating pin 32 and the locating sleeve 31 to limit the locating pin 32 from escaping from the locating sleeve 31 under the elastic action force of the compression spring 33.

[0038] Based on the above embodiments, the present invention aims to solve the problem of providing a positioning pin installation structure for an electric hair clipper adjusting wrench, including an adjusting wrench 1, a mounting hole 2 is provided on the side of the adjusting wrench 1 close to the electric hair clipper body, a positioning pin assembly 3 is inserted in the mounting hole 2, the positioning pin assembly 3 includes a positioning sleeve 31 fixedly inserted in the mounting hole 2, a positioning pin 32 movably inserted in the positioning sleeve 31 and a compression spring 33 sleeved on the outer peripheral side of the positioning pin 32, one end of the compression spring 33 abuts against the positioning sleeve 31, and the other end of the compression spring 33 abuts against the positioning pin 32, so that the positioning pin 32 always has a tendency to move toward the direction of the electric hair clipper body, and one end of the positioning pin 32 protrudes from the positioning sleeve 31; a limiting mechanism is provided between the positioning pin 32 and the positioning sleeve 31 to limit the positioning pin 32 from escaping from the positioning sleeve 31 under the elastic action force of the compression spring 33. The positioning sleeve 31 of the present invention is fixedly inserted into the mounting hole 2. One end of the compression spring 33 abuts against the positioning sleeve 31, and the other end of the compression spring 33 abuts against the positioning pin 32. Driven by the elastic force of the compression spring 33, the positioning pin 32 always has a tendency to move out of the positioning sleeve 31. However, due to the provision of a limiting mechanism, the positioning pin 32 cannot fall out of the positioning sleeve 31. This structural design avoids the risk of the plug 400 falling out of the positioning hole 101 in the prior art, resulting in structural failure, and improves product reliability.

[0039] As another preferred embodiment of the present invention, the positioning sleeve 31 includes a first end 311 located at the bottom of the mounting hole 2 and a second end 312 located at the mouth of the mounting hole 2. The peripheral wall of the positioning sleeve 31 is provided with at least two slits 313 along the circumferential direction. The slits 313 extend from the second end 312 of the positioning sleeve 31 toward the first end 311, and pass through the first end 311 of the positioning sleeve 31 and end at the second end 312 of the positioning sleeve 31. At least two slits 313 divide the first end 311 of the positioning sleeve 31 into at least two positioning pieces 314. The limiting mechanism includes a protrusion 3141 disposed on the inner circumference of the positioning piece 314 and extending toward the axis of the positioning sleeve 31, and a conical head 321 disposed at one end of the positioning pin 32. The protrusions 3141 of the at least two positioning pieces 314 are located on the same circumference. The conical head 321 is inserted into the center hole surrounded by the protrusions 3141 and cooperates with the protrusions 3141 to prevent the positioning pin 32 from being dislodged from the positioning sleeve 31. The conical head 321 includes a small end 3211 with a smaller diameter, located near the bottom of the positioning sleeve 31, and a large end 3212 with a larger diameter, located away from the bottom of the positioning sleeve 31. The diameter of the large end 3212 of the conical head 321 is larger than the diameter of the center hole surrounded by the protrusions 3141. The other end of the positioning pin 32 is provided with a gear head 322, and the gear head 322 is provided with a convex ring 3221. One end of the compression spring 33 abuts against the protrusion 3141, and the other end of the spring abuts against the convex ring 3221. There are two slits 313, and the two slits 313 are arranged opposite to each other.

[0040] In this embodiment, if Figure 8 As shown, the first end 311 of the positioning sleeve 31 is expandable by the setting of the slit 313. During installation, the compression spring 33 is sleeved on the outer peripheral side of the positioning pin 32, and then the conical head 321 of the positioning pin 32 is inserted into the center hole surrounded by the protrusion 3141 to form the positioning pin assembly 3. At this time, the first end 311 of the positioning sleeve 31 is stretched open by the conical head 321 due to the existence of the slit 313. After the conical head 321 passes over the protrusion 3141, the first end 311 of the positioning sleeve 31 returns to its original shape under the action of its own elastic force, and the protrusion 3141 and the large head end 3212 of the conical head 321 form a stop fit. Then insert the locating pin assembly 3 into the mounting hole 2. At this time, the first end 311 of the locating sleeve 31 cannot be opened by the conical head 321 due to the restriction of the inner wall of the mounting hole 2, so that the protrusion 3141 and the conical head 321 form a stable and reliable anti-slip fit, preventing the locating pin 32 from falling out of the mounting hole 2 under the elastic force of the compression spring 33.

[0041] In a further embodiment, Figure 8As shown, there are two slits 313, and the two slits 313 are arranged opposite each other. The two slits 313 divide the first end 311 of the positioning sleeve 31 into two positioning pieces 314. The inner circumferential walls of the two positioning pieces 314 are each provided with a protrusion 3141. When the cone head 321 is inserted into the center hole surrounded by the protrusions 3141, the resistance encountered by the cone head 321 when passing over the protrusions 3141 is evenly distributed to each positioning piece 314, thereby preventing the positioning piece 314 from being damaged due to uneven force.

[0042] As another preferred embodiment of the present invention, the gear head 322 is in the shape of a ball head. Figure 7 As shown, the gear head 322 of the positioning pin 32 cooperates with the gear slot located on one side of the fuselage, and the ball-shaped setting facilitates the positioning pin 32 to slide in the gear slot.

[0043] As another preferred embodiment of the present invention, the inner circumference of the mouth of the mounting hole 2 is provided with a stepped groove 21, and the outer circumference of the mouth of the positioning sleeve 31 is provided with a stepped portion 315 that matches the stepped groove 21. Figure 4 、 Figure 8 and Figure 9 As shown, the cooperation between the step portion 315 and the step groove 21 enables the positioning pin assembly 3 and the mounting hole 2 to be quickly positioned and installed, thereby avoiding excessive installation of the positioning pin assembly 3 and restricting the movement of the positioning pin 32.

[0044] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A positioning pin mounting structure for an electric hair clipper adjusting wrench, comprising an adjusting wrench (1), wherein a mounting hole (2) is provided on a side of the adjusting wrench (1) close to the electric hair clipper body, and characterized in that: A positioning pin assembly (3) is inserted into the mounting hole (2), and the positioning pin assembly (3) comprises a positioning sleeve (31) fixedly inserted into the mounting hole (2), a positioning pin (32) movably inserted into the positioning sleeve (31), and a compression spring (33) sleeved on the outer peripheral side of the positioning pin (32), one end of the compression spring (33) abuts against the positioning sleeve (31), and the other end of the compression spring (33) abuts against the positioning pin (32), so that the positioning pin (32) always has a tendency to move toward the direction of the electric hair clipper body, and one end of the positioning pin (32) protrudes from the positioning sleeve (31); a limiting mechanism is provided between the positioning pin (32) and the positioning sleeve (31) to limit the positioning pin (32) from coming out of the positioning sleeve (31) under the elastic force of the compression spring (33).

2. The positioning pin mounting structure of the adjusting wrench of an electric hair clipper according to claim 1, characterized in that: The positioning sleeve (31) comprises a first end (311) located at the bottom of the mounting hole (2) and a second end (312) located at the mouth of the mounting hole (2). The peripheral wall of the positioning sleeve (31) is provided with at least two slits (313) along the circumferential direction. The slits (313) extend from the second end (312) of the positioning sleeve (31) toward the first end (311), penetrate through the first end (311) of the positioning sleeve (31), and terminate at the second end (312) of the positioning sleeve (31).

3. The positioning pin mounting structure of the electric hair clipper adjusting wrench according to claim 2, characterized in that: At least two of the slits (313) divide the first end (311) of the positioning sleeve (31) into at least two positioning pieces (314), and the limiting mechanism comprises a protrusion (3141) provided on the inner circumference of the positioning piece (314) and extending toward the axis of the positioning sleeve (31) and a conical head (321) provided at one end of the positioning pin (32); the protrusions (3141) of at least two positioning pieces (314) are located on the same circumference, and the conical head (321) is inserted into the center hole surrounded by the protrusions (3141) and cooperates with the protrusion (3141) to limit the positioning pin (32) from coming out of the positioning sleeve (31).

4. The positioning pin mounting structure of the adjusting wrench of an electric hair clipper according to claim 3, characterized in that: The conical head portion (321) comprises a small head end (3211) with a smaller diameter, close to the bottom of the positioning sleeve (31), and a large head end (3212) with a larger diameter, away from the bottom of the positioning sleeve (31); and the diameter of the large head end (3212) of the conical head portion (321) is larger than the diameter of the central hole surrounded by the protrusion (3141).

5. The positioning pin mounting structure of the adjusting wrench of an electric hair clipper according to claim 3, characterized in that: The other end of the positioning pin (32) is provided with a gear head (322), and the gear head (322) is provided with a convex ring (3221). One end of the compression spring (33) abuts against the convex block (3141), and the other end of the spring abuts against the convex ring (3221).

6. The positioning pin mounting structure of the adjusting wrench of an electric hair clipper according to claim 5, characterized in that: The gear head (322) is in the shape of a ball head.

7. The positioning pin mounting structure of the adjusting wrench of an electric hair clipper according to claim 2, characterized in that: There are two slits (313), and the two slits (313) are arranged opposite to each other.

8. The positioning pin mounting structure of the adjusting wrench of an electric hair clipper according to claim 1, characterized in that: A step groove (21) is provided on the inner peripheral side of the mouth of the mounting hole (2), and a step portion (315) that cooperates with the step groove (21) is provided on the outer peripheral side of the mouth of the positioning sleeve (31).

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