Three-head shaver

Abstract

The utility model relates to the field of electric shavers, in particular to a three-head shaver. A three-head shaver comprises a shaver body and a shaver head, the shaver head comprises a shell and three sets of shaver head mechanisms, and each shaver head mechanism comprises an installation frame, a cutter head located on the installation frame, a blade matched with the cutter head, a center frame used for installing the blade, a limiting frame used for limiting the position of the center frame and a transmission assembly used for transmitting power to drive the blade to rotate. The transmission assembly comprises a transmission shaft, a transmission seat connected with the transmission shaft, a transmission piece connected to the transmission seat, a center positioning piece and a spring located between the transmission seat and the center positioning piece, the transmission piece and the transmission seat are in sliding connection in the axial direction of the transmission shaft, and the center positioning piece and the transmission seat are in sliding connection in the axial direction of the transmission shaft; and the central positioning piece is connected with the transmission piece in an inserting manner. And the central positioning piece and the transmission piece which are mutually inserted are in sliding connection with the transmission seat, so that the transmission positioning precision is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric shavers, in particular to a three-head shaver. BACKGROUND

[0002] In order to make the shaver fit the face during use, the existing three-head shaver adopts a floating head structure. The common floating head structure at present is to set a transmission member abutting on the floating head through a spring below the floating head, and then set the transmission member and the transmission shaft into an axially movable structure, so that the power of the transmission shaft can be transmitted to the head through the transmission member without affecting the floating of the head to fit the face.

[0003] However, the above technical solution has the following technical problems: Since the transmission shaft and the transmission member are required to be axially floating, a certain fitting gap needs to be left in the design, resulting in low coaxial precision of the transmission shaft and the transmission member. During the operation of the shaver, the transmission member will have a small radial excursion, resulting in a small amplitude vibration of the blade during rotation and causing wear with the cutter head, which greatly reduces the service life of the head. CONTENT OF THE UTILITY MODEL

[0004] In order to realize high transmission positioning precision of the floating head shaver, the present application provides a three-head shaver

[0005] The three-head shaver provided by the present application adopts the following technical solution:

[0006] A three-head shaver, comprising a body and a head, the head comprising a shell and three sets of head mechanisms, each head mechanism comprising a mounting frame, a cutter head on the mounting frame, a blade cooperating with the cutter head, a center frame for mounting the blade, a limiting frame for limiting the position of the center frame, and a transmission assembly for transmitting power to drive the blade to rotate, the transmission assembly comprising a transmission shaft, a transmission seat connected with the transmission shaft, a transmission member connected to the transmission seat, a center positioning member, and a spring between the transmission seat and the center positioning member, the transmission member being slidably connected with the transmission seat along the axial direction of the transmission shaft, the center positioning member being slidably connected with the transmission seat along the axial direction of the transmission shaft, and the center positioning member being inserted with the transmission member.

[0007] By adopting the above technical solution, since the transmission shaft and the transmission seat are fixedly connected, high fitting precision can be achieved. When the transmission seat outputs rotary power to the blade through the transmission member, since the center positioning member and the transmission member are inserted and cooperated, and both the center positioning member and the transmission member are slidably connected with the transmission seat, the transmission positioning precision is higher under the cooperation and positioning, the radial excursion amplitude is smaller, the blade is not easy to wear, and the service life is long.

[0008] Preferably, the transmission seat is cylindrical, an annular groove is formed on the side of the transmission seat facing the transmission member, a third groove is formed on the side of the center positioning member facing the transmission seat, and the two ends of the spring abut against the bottom surface of the annular groove and the bottom surface of the third groove, respectively.

[0009] By adopting the above technical scheme, the spring is limited in the third groove and the annular groove, so that the position of the spring cannot be deviated and fail.

[0010] Preferably, three first positioning grooves penetrating the side wall of the transmission seat are formed on the inner side wall of the annular groove in a circumferential direction, the first positioning grooves extend axially from the end of the transmission seat facing the transmission member, and the first positioning grooves do not extend to the end surface of the transmission seat away from the transmission member; the center positioning member comprises a center positioning table, the outer diameter of the center positioning table is equal to the large diameter of the annular groove, and three first positioning blocks are uniformly formed on the outer circle of the center positioning table in a circumferential direction, and the width of the first positioning blocks is equal to the width of the first positioning grooves.

[0011] By adopting the above technical scheme, the coaxiality of the transmission seat and the center positioning member is controlled by the cooperation of the annular groove and the outer circle of the center positioning table, and the two parts can slide axially but cannot rotate relatively in a circumferential direction by the cooperation of the first positioning blocks and the first positioning grooves.

[0012] Preferably, three second positioning grooves are uniformly formed on the outer side wall of the transmission seat in a circumferential direction, each of the second positioning grooves is located between two adjacent first positioning grooves, the second positioning grooves are not connected with the annular groove, the second positioning grooves extend axially from the end of the transmission seat away from the transmission member, and the second positioning grooves do not extend to the end surface of the transmission seat facing the transmission member; the transmission member comprises a cylindrical transmission table and a rotary connecting head connected to the side of the transmission table facing the blade for cooperating with the rotary connecting hole, a circular first groove is formed on the end of the transmission table facing the transmission seat, the inner diameter of the first groove is equal to the outer diameter of the transmission seat, three second positioning blocks are uniformly formed on the inner side wall of the first groove, and the width of the second positioning blocks is equal to the width of the second positioning grooves.

[0013] By adopting the above technical scheme, the coaxiality of the transmission seat and the transmission member is controlled by the cooperation of the inner wall of the first groove and the outer wall of the transmission seat, and the two parts can slide axially but cannot rotate relatively in a circumferential direction by the cooperation of the second positioning blocks and the second positioning grooves.

[0014] Preferably, a second groove in the shape of a conical frustum is formed in the middle of the bottom surface of the first groove, the end of the second groove connected with the first groove is the larger end, the center positioning member further comprises a center positioning column connected to the side of the center positioning table facing the transmission member, and the end of the center positioning column away from the center positioning table is in the shape of a conical frustum with a taper equal to the taper of the second groove.

[0015] By adopting the technical scheme, the coaxiality of the transmission seat and the center positioning column is controlled through the conical second groove and the center positioning column.

[0016] Preferably, the transmission seat is formed with a center hole, and the transmission shaft is formed with a spline matched with the center hole.

[0017] By adopting the technical scheme, the transmission shaft and the transmission seat are connected through the spline.

[0018] Preferably, the center of the mounting frame is formed with a through hole, and two connecting seats are symmetrically arranged along the center of the through hole on the side of the mounting frame facing the limiting frame. Each connecting seat is formed with a circular mounting hole 46 matched with the shell. The mounting holes 46 on the two connecting seats are coaxial.

[0019] By adopting the technical scheme, the mounting frame is connected with the shell through the mounting hole 46, and the mounting frame can be deflected relative to the shell.

[0020] Preferably, the connecting seat is formed with a locking hole located on the side of the mounting hole 46. The locking hole includes a locking section in communication with the mounting hole 46 and a movable section located at the end of the locking section away from the mounting hole 46. The locking section is equal in width. The movable section gradually increases in width from the locking section to the direction away from the locking section. The limiting frame includes a limiting ring. Two locking pieces are symmetrically arranged along the center of the limiting ring. The thickness of the locking piece is equal to the width of the locking hole. The length of the locking piece is greater than the width of the movable section and less than the total length of the movable section and the locking section.

[0021] By adopting the technical scheme, the locking section and the movable section are arranged to realize the assembly of the tool head mechanism. When the locking piece is located in the locking hole, the tool head and the mounting frame can be controlled to deflect relative to each other within a certain angle.

[0022] Preferably, the tool head includes a cover body and a limiting edge located at the edge of the cover body. The outer diameter of the cover body is slightly smaller than the diameter of the through hole. The diameter of the limiting edge is greater than the diameter of the through hole. The limiting edge is formed with an avoiding hole avoiding the connecting seat.

[0023] Preferably, the center of the cover body is protrusively formed with a cylindrical rotary positioning column in the direction of the center frame. The center frame includes a large-diameter section and a small-diameter section which are cylindrical and have end faces connected. The end face of the large-diameter section away from the small-diameter section is formed with a rotary positioning hole matched with the rotary positioning column. The limiting frame further includes an abutting ring connected with the limiting ring. The abutting ring abuts against the end face of the large-diameter section close to the end of the small-diameter section.

[0024] By adopting the technical scheme, when the blade rotates relative to the tool head, the centers of the two are aligned through the cooperation of the rotary positioning column and the rotary positioning hole.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. When the transmission seat outputs rotary power to the blade through the transmission part, due to the insertion fit between the center positioning part and the transmission part, and the sliding connection of the center positioning part and the transmission part with the transmission seat, the transmission positioning accuracy is higher, the radial movement range is smaller, the blade is not easy to wear, and the service life is long.

[0027] 2. The setting of the locking segment and the movable segment realizes the assembly of the tool head mechanism at the same time, so that when the locking piece is located in the locking hole, the relative deflection of the cutter head and the mounting frame within a certain angle can be controlled. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of an embodiment;

[0029] Figure 2 is an exploded view of the tool head mechanism part;

[0030] Figure 3 is a structural schematic diagram of the mounting frame;

[0031] Figure 4 is an exploded view of the blade, the blade, the center frame, and the limiting frame;

[0032] Figure 5 is an exploded view of the transmission assembly;

[0033] Figure 6 is a structural schematic diagram of the transmission seat;

[0034] Figure 7 is a structural schematic diagram of the transmission part.

[0035] BRIEF DESCRIPTION OF DRAWINGS: 1, machine body; 2, machine head; 3, shell; 4, tool head mechanism; 5, mounting frame; 6, cutter head; 7, blade; 8, center frame; 9, limiting frame; 10, transmission assembly; 11, through hole; 12, connecting seat; 13, locking hole; 14, locking segment; 15, movable segment; 16, cover body; 17, limiting edge; 18, avoiding hole; 19, rotary positioning column; 20, large diameter segment; 21, small diameter segment; 22, rotary positioning hole; 23, rotary connecting hole; 24, limiting ring; 25, abutting ring; 26, locking piece; 27, transmission shaft; 28, transmission seat; 29, transmission part; 30, center positioning part; 31, spring; 32, spline; 33, center hole; 34, annular groove; 35, first positioning groove; 36, second positioning groove; 37, transmission table; 38, rotary connecting head; 39, first groove; 40, second groove; 41, second positioning block; 42, center positioning table; 43, center positioning column; 44, third groove; 45, first positioning block; 46, mounting hole 46. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0037] This application discloses a three-head shaver. The terms "up", "down", "left" and "right" used in the embodiments are schematic representations of relative directions and are not limitations on the positional relationship.

[0038] like Figure 1 As shown, the three-head shaver includes a body 1 and a head 2. The head 2 includes a housing 3 and three sets of blade mechanisms 4.

[0039] like Figure 2 As shown, the cutter head mechanism 4 includes a mounting frame 5, a cutter head 6 located on the mounting frame 5, a blade 7 that cooperates with the cutter head 6, a central frame 8 for mounting and fixing the blade 7, a limiting frame 9 for limiting the position of the central frame 8, and a transmission assembly 10 for transmitting power to drive the blade 7 to rotate.

[0040] like Figure 2 and Figure 3 As shown, the mounting bracket 5 has a through hole 11 formed in its center. Two connecting seats 12 are symmetrically arranged along the center of the through hole 11 on the side of the mounting bracket 5 facing the limiting bracket 9. Each connecting seat 12 has a mounting hole 46 that mates with the housing 3 and a locking hole 13 located on the side of the mounting hole 46. The shape of the mounting hole 46 is adapted to the mounting parts on the housing 3. In this application, the mounting hole 46 is circular, and the mounting holes 46 on the two connecting seats 12 are coaxial. The locking hole 13 includes a locking section 14 communicating with the mounting hole 46, and a movable section 15 located at the end of the locking section 14 away from the mounting hole 46. The locking section 14 has a uniform width, and the movable section 15 gradually increases in width from near the locking section 14 to away from the locking section 14.

[0041] like Figure 2 and Figure 4 As shown, the cutter head 6 includes a cover 16 and a limiting edge 17 located at the edge of the cover 16. The outer diameter of the cover 16 is slightly smaller than the diameter of the through hole 11, and the diameter of the limiting edge 17 is larger than the diameter of the through hole 11. A clearance hole 18 for the clearance connecting seat 12 is formed on the limiting edge 17. A cylindrical rotating positioning post 19 is formed protruding from the center of the cover 16 towards the center frame 8.

[0042] like Figure 2 and Figure 4 As shown, the center frame 8 includes a cylindrical large-diameter section 20 and a small-diameter section 21 connected at their ends. The end face of the large-diameter section 20 facing away from the small-diameter section 21 is formed with a rotary positioning hole 22 that mates with the rotary positioning post 19, and the end face of the small-diameter section 21 facing away from the large-diameter section 20 is formed with a rotary connection hole 23.

[0043] As Figure 2 and Figure 4 shown, the limiting frame 9 includes a limiting ring 24 and an abutting ring 25, the diameter of the limiting ring 24 is larger than that of the abutting ring 25, the limiting ring 24 is connected with the abutting ring 25, and the abutting ring 25 abuts against the end face of the large-diameter section 20 close to the small-diameter section 21 of the center frame 8. The outer ring of the limiting ring 24 is provided with two locking pieces 26 which are symmetrically arranged at the center of the limiting ring 24, the thickness of the locking piece 26 is equal to the width of the locking hole 13, and the length of the locking piece 26 is slightly larger than the width of the movable section 15.

[0044] As Figure 2 , Figure 5 and Figure 6 shown, the transmission assembly 10 includes a transmission shaft 27, a transmission seat 28 connected with the transmission shaft 27, a transmission piece 29 connected with the transmission seat 28, a center positioning piece 30, and a spring 31 located between the transmission seat 28 and the center positioning piece 30. The transmission shaft 27 is formed with a spline 32 which is connected and positioned with the transmission seat 28. The transmission seat 28 is in the shape of a cylinder as a whole and is formed with a center hole 33 which cooperates with the transmission shaft 27 in the center, an annular groove 34 is formed on the side of the transmission seat 28 facing the transmission piece 29 at a position outside the center hole 33, the spring 31 is located in the annular groove 34 and abuts against the bottom surface of the annular groove 34. Three first positioning grooves 35 which penetrate through the side wall of the transmission seat 28 are formed on the inner side wall of the annular groove 34 in a circumferential direction, the first positioning groove 35 extends axially along the transmission seat 28 from the end of the transmission seat 28 facing the transmission piece 29, and the first positioning groove 35 does not extend to the end face of the transmission seat 28 away from the transmission piece 29. Three second positioning grooves 36 are uniformly formed on the outer side wall of the transmission seat 28 in a circumferential direction, each of the second positioning grooves 36 is located between two adjacent first positioning grooves 35, the second positioning groove 36 does not communicate with the annular groove 34, and the second positioning groove 36 extends axially along the transmission seat 28 from the end of the transmission seat 28 away from the transmission piece 29 and does not extend to the end face of the transmission seat 28 facing the transmission piece 29.

[0045] As Figure 2 , Figure 5 and Figure 7As shown, the transmission member 29 comprises a cylindrical transmission base 37, a rotary connecting head 38 connected to the side of the transmission base 37 facing the center frame 8 for cooperating with the rotary connecting hole 23, and a circular first recess 39 formed at the end of the transmission base 37 facing the transmission seat 28, the inner diameter of the first recess 39 being equal to the outer diameter of the transmission seat 28. A conical second recess 40 is formed in the middle of the bottom surface of the first recess 39, and the end of the second recess 40 connected to the first recess 39 is the larger end. Three second positioning blocks 41 are uniformly formed on the inner side wall of the first recess 39. The width of the second positioning blocks 41 is equal to the width of the second positioning groove 36, and the side surface of the second positioning blocks 41 facing outward from the side wall of the first recess 39 is inclined toward the center of the first recess 39 to the second recess 40.

[0046] As shown in Figure 2 and Figure 5 the center positioning member 30 comprises a center positioning base 42 and a center positioning column 43 connected to the side of the center positioning base 42 facing the transmission member 29, and the end of the center positioning column 43 away from the center positioning base 42 is a conical base with a taper equal to that of the second recess 40. A circular third recess 44 is formed in the center of the side of the center positioning base 42 facing away from the center positioning column 43, and the outer diameter of the center positioning base 42 is equal to the large diameter of the annular recess 34, and the inner diameter of the third recess 44 is greater than the small diameter of the annular recess 34. Three first positioning blocks 45 are uniformly formed on the outer circle of the center positioning base 42 in the circumferential direction, and the width of the first positioning blocks 45 is equal to the width of the first positioning groove 35.

[0047] As shown in Figure 2 the transmission assembly 10 is sequentially combined in the order of the transmission shaft 27, the transmission seat 28, the spring 31, the center positioning member 30, and the transmission member 29, and the transmission shaft 27 is connected to the center hole 33 of the transmission seat 28 through the spline 32. One end of the spring 31 abuts against the bottom surface of the annular recess 34, the other end of the spring 31 abuts against the third recess 44 of the center positioning member 30, the center positioning member 30 is inserted into the annular recess 34, and the three first positioning blocks 45 of the center positioning member 30 are inserted and positioned with the first positioning groove 35. The transmission member 29 is sleeved on the center positioning member 30 and the transmission seat 28, and the second positioning blocks 41 on the transmission member 29 are clamped into the second positioning groove 36, so that the transmission member 29 and the transmission seat 28 are positioned. At this time, the top of the center positioning column 43 of the center positioning member 30 is inserted into the second recess 40, so that the transmission member 29 and the center positioning member 30 are positioned.

[0048] In use, the cutter head 6 is adjusted by changing the angle of the face of the user, and in the process of changing, the transmission member 29 is always connected to the center frame 8 to transmit power under the action of the spring 31, and the positioning accuracy of the transmission member 29 is higher due to the cooperation of the center positioning member 30, the vibration is reduced, and the service life of the cutter blade 7 is prolonged.

[0049] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A three-headed shaver comprising a body (1) and a head (2), the head (2) comprising a housing (3) and three groups of head mechanisms (4), characterized in that, The cutter head mechanism (4) comprises a mounting frame (5), a cutter disc (6) on the mounting frame (5), a cutter blade (7) matched with the cutter disc (6), a center frame (8) for mounting the cutter blade (7), a limiting frame (9) for limiting the position of the center frame (8), and a transmission assembly (10) for transmitting power to drive the cutter blade (7) to rotate, the transmission assembly (10) comprising a transmission shaft (27), a transmission seat (28) connected with the transmission shaft (27), a transmission piece (29) connected with the transmission seat (28), a center positioning piece (30), and a spring (31) between the transmission seat (28) and the center positioning piece (30), the transmission piece (29) and the transmission seat (28) being in axial sliding connection along the transmission shaft (27), the center positioning piece (30) and the transmission seat (28) being in axial sliding connection along the transmission shaft (27), and the center positioning piece (30) being inserted with the transmission piece (29).

2. A three head shaver according to claim 1 characterized in that, The transmission seat (28) is in the shape of a cylinder, an annular groove (34) is formed on the side of the transmission seat (28) facing the transmission piece (29), a third groove (44) is formed on the side of the center positioning piece (30) facing the transmission seat (28), and the two ends of the spring (31) abut against the bottom surface of the annular groove (34) and the bottom surface of the third groove (44) respectively.

3. A three head shaver according to claim 2, characterized in that Three first positioning grooves (35) penetrating the side wall of the transmission seat (28) are formed on the inner side wall of the annular groove (34) in one circumferential direction, the first positioning grooves (35) extend axially from the end of the transmission seat (28) facing the transmission piece (29), and the first positioning grooves (35) do not extend to the end surface of the transmission seat (28) facing away from the transmission piece (29); the center positioning piece (30) comprises a center positioning platform (42), the outer diameter of the center positioning platform (42) is equal to the large diameter of the annular groove (34), and three first positioning blocks (45) are uniformly formed in the circumferential direction on the outer circle of the center positioning platform (42), the width of the first positioning blocks (45) is equal to the width of the first positioning grooves (35).

4. A three head shaver according to claim 3, characterized in that The outer side wall of the transmission seat (28) is uniformly formed with three second positioning grooves (36) in a circumferential direction, each of the second positioning grooves (36) is located between two adjacent first positioning grooves (35), and the second positioning groove (36) is not communicated with the annular groove (34), the second positioning groove (36) extends along the axial direction of the transmission seat (28) from the end of the transmission seat (28) away from the transmission member (29), and does not extend to the end face of the transmission seat (28) facing the transmission member (29); the transmission member (29) comprises a cylindrical transmission table (37), a rotary connecting head (38) connected to the side of the transmission table (37) facing the blade (7) for cooperating with the rotary connecting hole (23), a circular first groove (39) is formed at the end of the transmission table (37) facing the transmission seat (28), the inner diameter of the first groove (39) is equal to the outer diameter of the transmission seat (28), and three second positioning blocks (41) are uniformly formed on the inner side wall of the first groove (39), the width of the second positioning block (41) is equal to the width of the second positioning groove (36).

5. A three-headed shaver according to Claim 4, characterized in that The middle part of the bottom surface of the first groove (39) is formed with a conical second groove (40), one end of the second groove (40) connected with the first groove (39) is a larger end, the central positioning member (30) further comprises a central positioning column (43) connected to the side of the central positioning table (42) facing the transmission member (29), the end of the central positioning column (43) away from the central positioning table (42) is a conical table with a taper equal to that of the second groove (40).

6. A three-headed shaver according to any one of claims 1 to 5, characterized in that The transmission seat (28) is formed with a center hole (33), and the transmission shaft (27) is formed with a spline (32) matched and connected with the center hole (33).

7. A three-headed shaver according to any one of claims 1 to 5, characterized in that The center of the mounting frame (5) is formed with a through hole (11), and two connecting seats (12) are symmetrically arranged along the center of the through hole (11) on the side of the mounting frame (5) facing the limiting frame (9), a circular mounting hole (46) matched with the shell (3) is formed on each of the connecting seats (12), and the mounting holes (46) on the two connecting seats (12) are coaxial.

8. A three-headed shaver according to Claim 7, characterized in that A locking hole (13) is formed on the connecting seat (12) and located on the side of the mounting hole (46), the locking hole (13) comprises a locking section (14) communicated with the mounting hole (46) and a movable section (15) located at the end of the locking section (14) away from the mounting hole (46), the locking section (14) has the same width, and the width of the movable section (15) gradually increases from the locking section (14) to the direction away from the locking section (14); the limiting frame (9) comprises a limiting ring (24), two locking pieces (26) are symmetrically arranged on the outer ring of the limiting ring (24) and along the center of the limiting ring (24), the thickness of the locking piece (26) is equal to the width of the locking hole (13), and the length of the locking piece (26) is greater than the width of the movable section (15) and less than the total length of the movable section (15) and the locking section (14).

9. A three-headed shaver according to Claim 8, characterized in that The cutter head (6) comprises a cover body (16) and a limiting edge (17) at the edge of the cover body (16), the outer diameter of the cover body (16) is slightly smaller than the diameter of the through hole (11), the diameter of the limiting edge (17) is larger than the diameter of the through hole (11), and the limiting edge (17) is formed with a relief hole (18) avoiding the connecting seat (12).

10. A three-headed shaver according to Claim 9, characterized in that The center of the cover body (16) is protrusively formed with a cylindrical rotation positioning column (19) towards the center frame (8), the center frame (8) comprises a large-diameter section (20) and a small-diameter section (21) with connected end faces, the end face of the large-diameter section (20) away from the small-diameter section (21) is formed with a rotation positioning hole (22) matched with the rotation positioning column (19), and the limiting frame (9) further comprises an abutting ring (25) connected with the limiting ring (24), and the abutting ring (25) abuts against the end face of the large-diameter section (20) of the center frame (8) close to one end of the small-diameter section (21).

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