CN218922849U

CN218922849U - Multifunctional electric toothbrush

Info

Publication number: CN218922849U
Application number: CN202220921311.1U
Authority: CN
Inventors: 何少敏
Original assignee: Wenzhou Lebang Electric Appliance Co ltd
Current assignee: Wenzhou Lebang Electric Appliance Co ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2023-04-28
Anticipated expiration: 2032-04-20

Abstract

The utility model relates to a multifunctional electric toothbrush which comprises a handle body and a toothbrush head, wherein the toothbrush head is arranged on the handle body through a connecting seat, a transmission part is arranged on the handle body, the transmission part can slide along the length direction of the handle body and is arranged on the handle body, the transmission part can be arranged on the handle body in a reciprocating rotation mode around the direction of the transmission part, the connecting seat is in linkage connection with the transmission part, and the multifunctional electric toothbrush further comprises a first transmission mechanism for driving the transmission part to rotate in a reciprocating mode and a second transmission mechanism for driving the transmission part to slide in a reciprocating mode along the length direction of the handle body. By adopting the scheme, the toothbrush head can realize reciprocating rotation and directional reciprocating sliding of the toothbrush head, the two tooth brushing modes can be switched for use, and the tooth cleaning effect is better.

Description

Multifunctional electric toothbrush

Technical Field

The utility model relates to the technical field of toothbrushes, in particular to a multifunctional electric toothbrush.

Background

In daily life, in order to clean the oral cavity, a toothbrush is used for cleaning the oral cavity, but the condition that the teeth are not cleaned is usually caused by a manual toothbrush, and the problems that gum bleeding is caused by the fact that manual operation force and action are not standard, tooth enamel is abraded and the like are caused. Electric toothbrushes are currently available on the market and comprise a handle body and a toothbrush head, wherein a motor core in the handle body rapidly rotates or vibrates to drive the toothbrush head to generate high-frequency vibration, and the vibration is transmitted to bristles of the toothbrush head to brush teeth. However, the brush head can only vibrate irregularly, and can not brush the surface of teeth in a reciprocating manner like a normal toothbrush, and the cleaning effect of the teeth is poor.

Disclosure of Invention

The multifunctional electric toothbrush overcomes the defects of the prior art, can realize the reciprocating rotation of the toothbrush head, can realize the directional reciprocating sliding of the toothbrush head, can be used in a switching way, and has better tooth cleaning effect.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a multifunctional electric toothbrush, includes the handle body and toothbrush head, and the toothbrush head passes through the connecting seat and installs on the handle body, be provided with the driving medium on the handle body, the setting that the driving medium can slide along the length direction of the handle body is on the handle body, and the driving medium can be around the reciprocal pivoted setting in the direction of its center on the handle body, and the connecting seat is connected with the driving medium linkage, still including driving the reciprocal pivoted first drive mechanism of driving medium and driving the reciprocal second drive mechanism who slides of length direction along the handle body of driving medium.

Through adopting above-mentioned scheme, toothbrush head and connecting seat can be integral type structure, also can be split type structure, the driving medium can be integral type structure, also can be split type assembly structure, first drive mechanism drives the reciprocal rotation of driving medium, thereby drive the reciprocal rotation of toothbrush head, second drive mechanism drives the reciprocating slippage of driving medium along the length direction of the handle body, thereby drive the reciprocal slippage of orientation of toothbrush head, first drive mechanism and second drive mechanism can be driven by a driving source, also can be driven by two driving sources respectively, it can not only realize the reciprocal rotation of toothbrush head, can also realize the reciprocal slippage of orientation of toothbrush head, two kinds of tooth brushing modes of toothbrush head can switch the use according to actual need, the cleaning performance of tooth is better.

The utility model is further provided with the following steps: the first transmission mechanism comprises a first rotating seat, a central shaft of the first rotating seat is arranged along the length direction of the handle body, the first rotating seat is directly or indirectly arranged on the handle body in a rotating mode, the first rotating seat is connected with the transmission piece through a first eccentric structure, and the transmission piece can be driven to rotate in a reciprocating mode through the first eccentric structure when the first rotating seat rotates.

Through adopting above-mentioned scheme, first rotation seat can be rotated by the drive source drive, and it drives the reciprocating rotation of driving medium through first eccentric structure, simple structure, reasonable in design.

The utility model is further provided with the following steps: the second transmission mechanism comprises a swinging piece, the swinging piece is directly or indirectly hinged on the handle body through a hinge shaft, the axial direction of the hinge shaft is perpendicular to the length direction of the handle body, the swinging piece is connected with the transmission piece, and the swinging piece can drive the transmission piece to slide back and forth along the length direction of the handle body.

Through adopting above-mentioned scheme, the swinging member can be driven by the actuating source and reciprocate around the articulated shaft, and the swinging member is directly or indirectly connected with the driving medium, and the swinging member drives the reciprocating slippage of driving medium along the length direction of handle body through reciprocating wobbling mode, simple structure, reasonable in design.

The utility model is further provided with the following steps: the second transmission mechanism further comprises a second rotating seat, a central shaft of the second rotating seat is arranged along the length direction of the handle body, the second rotating seat is directly or indirectly arranged on the handle body in a rotating mode, the second rotating seat is connected with the swinging piece through a second eccentric structure, and the second rotating seat can drive the swinging piece to swing in a reciprocating mode through the second eccentric structure.

Through adopting above-mentioned scheme, the second rotates the seat and can be driven by the actuating source and rotate, and it drives the reciprocal swing of swinging member through the second eccentric structure, simple structure, reasonable in design.

The utility model is further provided with the following steps: the first rotating seat synchronously rotates and is provided with a first driving gear, the second rotating seat synchronously rotates and is provided with a second driving gear, the device further comprises a motor, an output shaft of the motor is arranged along the length direction of the handle body, the output shaft of the motor synchronously rotates and is provided with a third driving gear, and when the third driving gear positively rotates, the third driving gear drives the first driving gear to rotate, so that the transmission piece is driven to reciprocally rotate; when the third driving gear rotates reversely, the third driving gear drives the second driving gear to rotate, so that the transmission piece is driven to slide back and forth along the length direction of the handle body.

By adopting the scheme, the first rotating seat and the first driving gear are integrally or separately arranged, the second rotating seat and the second driving gear are integrally or separately arranged, the output shaft of the motor is arranged along the length direction of the handle body, the installation space is saved, and when the third driving gear rotates positively, the third driving gear drives the first driving gear to rotate, and the third driving gear does not drive the second driving gear to rotate; when the third driving gear rotates reversely, the third driving gear drives the second driving gear to rotate, the third driving gear does not drive the first driving gear to rotate, and the output shaft of the motor is switched to rotate positively or reversely, namely, the reciprocating rotation or reciprocating sliding of the transmission piece is realized, so that the switching of two tooth brushing modes can be realized, and compared with the arrangement of two motors to drive respectively, the structure is simplified, the cost is reduced, and the design is more reasonable.

The utility model is further provided with the following steps: the first transmission mechanism further comprises a first transmission gear, the first transmission gear is directly or indirectly rotatably arranged on the handle body, a central shaft of the first transmission gear is arranged along the length direction of the handle body, the first transmission gear can be directly or indirectly slidably arranged on the handle body along the direction of approaching or separating from the first driving gear, the second transmission mechanism further comprises a second transmission gear, the second transmission gear is directly or indirectly rotatably arranged on the handle body, the central shaft of the second transmission gear is arranged along the length direction of the handle body, the second transmission gear can be directly or indirectly slidably arranged on the handle body along the direction of approaching or separating from the second driving gear, the third driving gear is always meshed with the first transmission gear and the second transmission gear, and when the third driving gear rotates positively, the first transmission gear moves to be meshed with the first driving gear, and the second transmission gear moves to be disengaged from the second driving gear; when the third driving gear is reversed, the first driving gear moves to be disengaged from the first driving gear, and the second driving gear moves to be engaged with the second driving gear.

Through adopting the scheme, the support is integrally or separately arranged in the handle body, the first driving gear is rotationally arranged on the support through the first rotating shaft, the support is provided with the first guide groove, the first guide groove is arranged along the direction close to or far away from the first driving gear, the first rotating shaft can slide along the first guide groove, the second driving gear is rotationally arranged on the support through the second rotating shaft, the support is provided with the second guide groove, the second guide groove is arranged along the direction close to or far away from the second driving gear, the second rotating shaft can slide along the second guide groove, the third driving gear is always meshed with the first driving gear and the second driving gear, and when the third driving gear positively rotates, the third driving gear can move the first driving gear to the meshing position with the first driving gear and can move the second driving gear to the position which is separated from the second driving gear, and at the moment, the first rotating seat can drive the driving piece to reciprocally rotate; when the third driving gear rotates reversely, the third driving gear can move the second transmission gear to the meshing position with the second driving gear, and can move the first transmission gear to the meshing position which is separated from the first driving gear, and at the moment, the second rotating seat can drive the transmission piece to slide in a reciprocating manner, so that the structure is simple, and the design is reasonable.

The utility model is further provided with the following steps: the first eccentric structure comprises a first eccentric shaft which is fixedly or integrally arranged on the first rotating seat, the first eccentric shaft is arranged deviating from the central shaft of the first rotating seat, a jack for the first eccentric shaft to be inserted is arranged at the position of the transmission part deviating from the central shaft, the first rotating seat drives the first eccentric shaft to do eccentric motion, and the first eccentric shaft abuts against the side wall of the jack to drive the transmission part to rotate reciprocally.

Through adopting above-mentioned scheme, first rotation seat drives first eccentric shaft and makes eccentric motion, and first eccentric shaft supports the lateral wall that leans on the jack and can drive the reciprocating rotation of driving medium in certain angle range, simple structure, reasonable in design.

The utility model is further provided with the following steps: the swing piece is provided with a collision part, the transmission piece is provided with a containing cavity for inserting the collision part, and when the swing piece swings reciprocally, the upper end face and the lower end face of the containing cavity can be propped by the collision part on the swing piece, so that the transmission piece is driven to slide reciprocally.

Through adopting above-mentioned scheme, the setting in holding chamber not only can supply the conflict portion conflict of swinging member to reciprocating rotation setting at the driving medium, swinging member can not influence driving medium normal operating, simple structure, reasonable in design.

The utility model is further provided with the following steps: the second eccentric structure comprises a second eccentric shaft which is fixed or integrally arranged on the second rotating seat, the second eccentric shaft deviates from the central shaft of the second rotating seat, a placing groove for inserting the second eccentric shaft is arranged on the swinging piece, the second rotating seat drives the second eccentric shaft to do eccentric motion, and the second eccentric shaft abuts against the side wall of the placing groove to drive the swinging piece to swing reciprocally.

Through adopting above-mentioned scheme, the second rotates the seat and drives the second eccentric shaft and do eccentric motion, and the second eccentric shaft supports the lateral wall that leans on the standing groove and can drive the reciprocating pendulum of swinging member in certain angle range to drive the reciprocating slippage of driving medium in certain stroke range, simple structure, reasonable in design.

The utility model is further provided with the following steps: the connecting seat is connected with the transmission piece through the installation sleeve, one end of the installation sleeve is in plug-in fit with the connecting seat, and the other end of the installation sleeve is in plug-in fit with the transmission piece.

Through adopting above-mentioned scheme, the connected mode of connecting seat and driving medium is simple, easy dismounting, and the transmission is stable.

The utility model is further described below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of the explosive structure of FIG. 1;

FIG. 3 is a schematic view of the structure of the interior of the handle body;

FIG. 4 is a schematic diagram of the mating structure of the motor, the first transmission mechanism and the second transmission mechanism;

FIG. 5 is a schematic diagram of the mating structures of the third drive gear, the first drive gear, and the second drive gear;

FIG. 6 is a schematic diagram showing a third driving gear driving the first driving gear to rotate;

fig. 7 is a schematic structural view of the first guide groove and the second guide groove;

FIG. 8 is a schematic diagram of a driving member;

fig. 9 is a schematic structural view of the swinging member.

Detailed Description

As shown in fig. 1-9, a multifunctional electric toothbrush comprises a handle body 1 and a toothbrush head 2, wherein the toothbrush head 2 is arranged on the handle body 1 through a connecting seat 3, the toothbrush head and the toothbrush head 2 can be of an integrated structure or a split structure, a transmission part 4 is arranged on the handle body 1, the transmission part 4 can be of an integrated structure or a split assembly structure, the transmission part 4 can be arranged on the handle body 1 in a sliding manner along the length direction of the handle body 1, the transmission part 4 can be rotationally arranged on the handle body 1 around the direction of a central shaft thereof, the connecting seat 3 is connected with the transmission part 4 in a linkage manner, the connecting seat 3 and the transmission part 4 synchronously move and synchronously rotate, and the multifunctional electric toothbrush further comprises a first transmission mechanism for driving the transmission part 4 to reciprocally rotate and a second transmission mechanism for driving the transmission part 4 to reciprocally slide along the length direction of the handle body 1. The first transmission mechanism and the second transmission mechanism can be driven by one driving source or two driving sources respectively, and the two tooth brushing modes of the toothbrush head 2 can be switched to be used according to actual needs, so that the tooth cleaning effect is better.

In this embodiment, the first transmission mechanism includes a first rotating seat 51, a central shaft of the first rotating seat 51 is disposed along a length direction of the handle body 1, the first rotating seat 51 is directly or indirectly rotatably disposed on the handle body 1, the first rotating seat 51 is connected with the transmission member 4 through a first eccentric structure, and the first rotating seat 51 can rotate to drive the transmission member 4 to reciprocally rotate through the first eccentric structure. Of course, the transmission piece can be driven to rotate reciprocally through the structure of gear engagement.

In this embodiment, the second transmission mechanism includes a swinging member 61, the swinging member 61 is directly or indirectly hinged on the handle body 1 through a hinge shaft 611, the axial direction of the hinge shaft 611 is perpendicular to the length direction of the handle body 1, the swinging member 61 is directly or indirectly connected with the transmission member 4, and the swinging member 61 swings reciprocally to drive the transmission member 4 to slide reciprocally along the length direction of the handle body 1. Of course, the transmission part 4 can also be driven to slide back and forth along the length direction of the handle body 1 by the structure of the gear and the rack.

In this embodiment, the second transmission mechanism further includes a second rotating seat 62, a central axis of the second rotating seat 62 is disposed along the length direction of the handle body 1, the second rotating seat 62 is directly or indirectly rotatably disposed on the handle body 1, the second rotating seat 62 is connected with the swinging member 61 through a second eccentric structure, and the swinging member 61 can be driven to swing reciprocally by the rotation of the second rotating seat 62 through the second eccentric structure. Of course, the driving source can directly drive the swinging piece to swing reciprocally.

In this embodiment, the first rotating seat 51 is provided with the first driving gear 52 in a synchronous rotation manner, the first rotating seat 51 and the first driving gear 52 are integrally or separately provided, the second rotating seat 62 is provided with the second driving gear 63 in a synchronous rotation manner, the second rotating seat 62 and the second driving gear 63 are integrally or separately provided, the second rotating seat further comprises a motor 7, an output shaft of the motor 7 is arranged along the length direction of the handle body 1, a third driving gear 71 is synchronously arranged on the output shaft of the motor 7, and when the third driving gear 71 positively rotates, the third driving gear 71 drives the first driving gear 52 to rotate, and the third driving gear 71 does not drive the second driving gear 63 to rotate, so as to drive the transmission member 4 to reciprocally rotate; when the third driving gear 71 is reversed, the third driving gear 71 drives the second driving gear 63 to rotate, and the third driving gear 71 does not drive the first driving gear 52 to rotate, so that the driving member 4 is driven to slide back and forth along the length direction of the handle body.

In this embodiment, a bracket 8 is integrally or separately disposed in the handle body 1, the first transmission mechanism further includes a first transmission gear 53, the first transmission gear 53 is rotatably disposed on the bracket 8 through a first rotating shaft 531, a central axis of the first transmission gear 53 is disposed along a length direction of the handle body 1, a first guide groove 81 is disposed on the bracket 8, the first guide groove 81 is disposed along a direction approaching or separating from the first driving gear 52, the first rotating shaft 531 can slide along the first guide groove 81, the second transmission mechanism further includes a second transmission gear 64, the second transmission gear 64 is rotatably disposed on the bracket 8 through a second rotating shaft 641, a central axis of the second transmission gear 64 is disposed along a length direction of the handle body 1, a second guide groove 82 is disposed on the bracket 8, the second guide groove 82 is disposed along a direction approaching or separating from the second driving gear 63, the second rotating shaft 641 can slide along the second guide groove 82, the third driving gear 71 is always engaged with the first transmission gear 53 and the second transmission gear 64, and the third driving gear 71 is rotated forward and backward, the first transmission gear 53 is moved to be disengaged from the first transmission gear 52, and the second transmission gear 64 is driven to be engaged with the second transmission gear 63, and the first transmission gear 64 is reciprocally rotated; when the third driving gear 71 is reversed, the first driving gear 53 moves to disengage from the first driving gear 52, and the second driving gear 64 moves to engage with the second driving gear 63, and at this time, the second rotating seat 62 can drive the driving member 4 to slide reciprocally.

In this embodiment, the first eccentric structure includes a first eccentric shaft 511 fixed or integrally disposed on a first rotating seat 51, the first eccentric shaft 511 is disposed offset from a central axis of the first rotating seat 51, the transmission member 4 is provided with a jack 41 for inserting the first eccentric shaft 511 at a position offset from the central axis, the first rotating seat 51 drives the first eccentric shaft 511 to make an eccentric motion, and the first eccentric shaft 511 abuts against a side wall of the jack 41 to drive the transmission member 4 to reciprocally rotate. Of course, the transmission piece can be provided with a plug, the first rotating seat is provided with a slot, and the first rotating seat rotates to drive the transmission piece to rotate reciprocally.

In this embodiment, the swinging member 61 is provided with the abutting portion 612, the driving member 4 is provided with the accommodating cavity 42 into which the abutting portion 612 is inserted, and when the swinging member 61 swings reciprocally, the abutting portion 612 on the swinging member can abut against the upper and lower end surfaces of the accommodating cavity 42, so as to drive the driving member 4 to reciprocate, and when the driving member 4 rotates reciprocally, the abutting portion 612 of the swinging member 61 does not touch the driving member 4, and normal operation of the driving member 4 is not affected. Of course, the transmission piece can be provided with a connecting block, the swinging piece is provided with a connecting groove for the connecting block to be inserted, and the connecting block is inserted into the slot to realize the connection between the swinging piece and the transmission piece.

In this embodiment, the second eccentric structure includes a second eccentric shaft 621 fixedly or integrally disposed on the second rotating seat 62, the second eccentric shaft 621 is disposed offset from the central axis of the second rotating seat 62, the swinging member 61 is provided with a placement groove 613 in which the second eccentric shaft 621 is inserted, the second rotating seat 62 drives the second eccentric shaft 621 to make an eccentric motion, and the second eccentric shaft 621 abuts against a side wall of the placement groove 613 to drive the swinging member 61 to swing reciprocally.

In this embodiment, the connecting seat 3 is connected with the transmission member 4 through the mounting sleeve 9, one end of the mounting sleeve 9 is in plug-in fit with the connecting seat 3, and the other end of the mounting sleeve 9 is in plug-in fit with the transmission member 4. Of course, the connection base 3 may be directly connected to the transmission member 4.

The above embodiments are only preferred embodiments of the present utility model, and common variations and substitutions by those skilled in the art within the scope of the technical solution of the present utility model are included in the scope of the present utility model.

Claims

1. The utility model provides a multifunctional electric toothbrush, includes the handle body and toothbrush head, and the toothbrush head passes through the connecting seat to be installed on the handle body, its characterized in that: the handle body is provided with a transmission part, the transmission part can slide along the length direction of the handle body and is arranged on the handle body, the transmission part can reciprocate around the direction of the center of the transmission part and is arranged on the handle body, the connecting seat is connected with the transmission part in a linkage manner, and the handle further comprises a first transmission mechanism for driving the transmission part to reciprocate and a second transmission mechanism for driving the transmission part to slide along the length direction of the handle body.

2. A multi-functional electric toothbrush according to claim 1, wherein: the first transmission mechanism comprises a first rotating seat, a central shaft of the first rotating seat is arranged along the length direction of the handle body, the first rotating seat is directly or indirectly arranged on the handle body in a rotating mode, the first rotating seat is connected with the transmission piece through a first eccentric structure, and the transmission piece can be driven to rotate in a reciprocating mode through the first eccentric structure when the first rotating seat rotates.

3. A multi-functional electric toothbrush as claimed in claim 2, wherein: the second transmission mechanism comprises a swinging piece, the swinging piece is directly or indirectly hinged on the handle body through a hinge shaft, the axial direction of the hinge shaft is perpendicular to the length direction of the handle body, the swinging piece is connected with the transmission piece, and the swinging piece can drive the transmission piece to slide back and forth along the length direction of the handle body.

4. A multi-functional electric toothbrush according to claim 3, wherein: the second transmission mechanism further comprises a second rotating seat, a central shaft of the second rotating seat is arranged along the length direction of the handle body, the second rotating seat is directly or indirectly arranged on the handle body in a rotating mode, the second rotating seat is connected with the swinging piece through a second eccentric structure, and the second rotating seat can drive the swinging piece to swing in a reciprocating mode through the second eccentric structure.

5. A multi-functional electric toothbrush as claimed in claim 4, wherein: the first rotating seat synchronously rotates and is provided with a first driving gear, the second rotating seat synchronously rotates and is provided with a second driving gear, the device further comprises a motor, an output shaft of the motor is arranged along the length direction of the handle body, the output shaft of the motor synchronously rotates and is provided with a third driving gear, and when the third driving gear positively rotates, the third driving gear drives the first driving gear to rotate, so that the transmission piece is driven to reciprocally rotate; when the third driving gear rotates reversely, the third driving gear drives the second driving gear to rotate, so that the transmission piece is driven to slide back and forth along the length direction of the handle body.

6. A multi-functional electric toothbrush as claimed in claim 5, wherein: the first transmission mechanism further comprises a first transmission gear, the first transmission gear is directly or indirectly rotatably arranged on the handle body, a central shaft of the first transmission gear is arranged along the length direction of the handle body, the first transmission gear can be directly or indirectly slidably arranged on the handle body along the direction of approaching or separating from the first driving gear, the second transmission mechanism further comprises a second transmission gear, the second transmission gear is directly or indirectly rotatably arranged on the handle body, the central shaft of the second transmission gear is arranged along the length direction of the handle body, the second transmission gear can be directly or indirectly slidably arranged on the handle body along the direction of approaching or separating from the second driving gear, the third driving gear is always meshed with the first transmission gear and the second transmission gear, and when the third driving gear rotates positively, the first transmission gear moves to be meshed with the first driving gear, and the second transmission gear moves to be disengaged from the second driving gear; when the third driving gear is reversed, the first driving gear moves to be disengaged from the first driving gear, and the second driving gear moves to be engaged with the second driving gear.

7. A multi-functional electric toothbrush according to claim 2 or 3 or 4 or 5 or 6, characterized in that: the first eccentric structure comprises a first eccentric shaft which is fixedly or integrally arranged on the first rotating seat, the first eccentric shaft is arranged deviating from the central shaft of the first rotating seat, a jack for the first eccentric shaft to be inserted is arranged at the position of the transmission part deviating from the central shaft, the first rotating seat drives the first eccentric shaft to do eccentric motion, and the first eccentric shaft abuts against the side wall of the jack to drive the transmission part to rotate reciprocally.

8. A multi-functional electric toothbrush according to claim 3 or 4 or 5 or 6, characterized in that: the swing piece is provided with a collision part, the transmission piece is provided with a containing cavity for inserting the collision part, and when the swing piece swings reciprocally, the upper end face and the lower end face of the containing cavity can be propped by the collision part on the swing piece, so that the transmission piece is driven to slide reciprocally.

9. A multi-functional electric toothbrush according to claim 4 or 5 or 6, characterized in that: the second eccentric structure comprises a second eccentric shaft which is fixed or integrally arranged on the second rotating seat, the second eccentric shaft deviates from the central shaft of the second rotating seat, a placing groove for inserting the second eccentric shaft is arranged on the swinging piece, the second rotating seat drives the second eccentric shaft to do eccentric motion, and the second eccentric shaft abuts against the side wall of the placing groove to drive the swinging piece to swing reciprocally.

10. A multi-functional electric toothbrush according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that: the connecting seat is connected with the transmission piece through the installation sleeve, one end of the installation sleeve is in plug-in fit with the connecting seat, and the other end of the installation sleeve is in plug-in fit with the transmission piece.