Direct-drive toothbrush head and electric toothbrush

Abstract

The utility model relates to the field of electric toothbrushes, and provides a direct-drive toothbrush head and an electric toothbrush, the toothbrush head comprises a shell, a transmission piece and a bristle seat, the shell is provided with a containing cavity with two axial ends opened; one end of the transmission part is provided with a connecting groove and is arranged in the accommodating cavity of the shell, a driving shaft of a toothbrush handle is inserted into the connecting groove, and the other end of the transmission part extends out of the other end of the accommodating cavity; the bristle seat and the shell are arranged at an interval, bristles are arranged on the bristle seat, and the bristle seat is fixedly connected with the other end of the transmission part, so that the bristle seat is in direct driving connection with the driving shaft of the toothbrush handle through the transmission part. The electric toothbrush comprises a toothbrush head and a toothbrush handle. The two ends of the transmission part are suitable for being directly and fixedly connected with the driving shaft and the bristle base of the toothbrush handle, vibration of the driving shaft is directly transmitted to the bristle base through the transmission part, the vibration loss of the bristle base is small, and the vibration transmission efficiency is high; the bristle base and the shell are arranged at intervals, vibration of the bristle base is not transmitted to the shell, and the shell is prevented from vibrating the oral cavity to be numb.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electric toothbrush, further relates to a direct drive toothbrush head and electric toothbrush. BACKGROUND

[0002] In daily life, in order to clean the oral cavity quickly, electric toothbrush is often used, which includes detachable toothbrush handle and toothbrush head, the motor in the toothbrush handle drives the drive shaft to vibrate or rotate quickly, and the drive shaft drives the toothbrush head to vibrate quickly.At this time, the drive shaft of the toothbrush handle is not directly connected with the bristle holder of the toothbrush head, and the toothbrush handle needs to drive the whole toothbrush head to vibrate, and then the vibration is transmitted to the bristle holder of the toothbrush head.This results in that the vibration of the drive shaft cannot be directly transmitted to the bristle holder, the vibration loss of the bristle holder is large, and the vibration transmission efficiency is low. SUMMARY

[0003] In view of the above technical problems, the utility model aims at providing a direct drive toothbrush head and electric toothbrush, the two ends of the transmission part are suitable for directly fixed connection drive shaft of toothbrush handle and bristle holder, the vibration of the drive shaft is directly transmitted to the bristle holder through the transmission part, the vibration loss of the bristle holder is small, and the vibration transmission efficiency is high;The bristle holder is spaced apart from the shell, and the vibration of the bristle holder is not transmitted to the shell, so that the shell is avoided to vibrate the oral cavity.

[0004] In order to achieve the above object, the utility model provides a direct drive toothbrush head, which comprises a shell, a transmission part and a bristle holder, the shell has a containing cavity with two open ends in the axial direction;

[0005] One end of the transmission part is provided with a connecting groove and is arranged in the containing cavity of the shell, the connecting groove is suitable for inserting the drive shaft of the toothbrush handle, and the other end of the transmission part extends out of the other end of the containing cavity;

[0006] The bristle holder is spaced apart from the shell, the bristle holder is provided with bristles, the bristle holder is fixedly connected with the other end of the transmission part, so that the bristle holder and the drive shaft of the toothbrush handle are directly driven and connected through the transmission part.

[0007] In some embodiments, the transmission part comprises a transmission rod and a hard rubber coating, the hard rubber coating is arranged on the outer side of one end of the transmission rod and is located in the containing cavity oppositely, one end of the hard rubber coating away from the bristle holder is provided with the connecting groove, and the other end of the transmission rod is fixedly connected with the bristle holder.

[0008] In some embodiments, the hard rubber coating is any one of POM, PC and PEEK hard materials.

[0009] In some embodiments, the transmission part and the shell are coaxially arranged, and the outer side wall of the transmission part and the inner side wall of the shell are not directly contacted;

[0010] The accommodating cavity is provided with a shaft sleeve at one end, the shaft sleeve is suitable for connecting a toothbrush handle, and the transmission member is not in direct contact with the shaft sleeve.

[0011] In some embodiments, the transmission member is an integral whole, the transmission member is coaxially arranged with the shell, and a gap is left between the inner side walls of the transmission member, the transmission member is directly connected in drive with the bristle holder and the drive shaft of the toothbrush handle.

[0012] In some embodiments, the bristle holder comprises a bristle holder body and a bristle support, the bristle support is fixedly installed on the bristle holder body, the bristle holder body is provided with a fixing groove near one side of the transmission member, the fixing groove is suitable for interference fit with the end of the transmission member and fixedly connected with the transmission member.

[0013] In some embodiments, the other end of the transmission member is further provided with a first connecting hole, the side wall of the bristle holder body is also correspondingly provided with a second connecting hole, the first connecting hole and the second connecting hole are suitable for installing a connecting member and fixedly connecting the transmission member and the bristle holder body.

[0014] In some embodiments, the installation direction of the connecting member is perpendicular to the axial direction of the shell, and the connecting member is relatively located at the bottom of the bristle support.

[0015] In some embodiments, the outer side of the bristle holder is further provided with a holder soft shell, the holder soft shell is arranged on the outer side of the bristle holder and exposes the bristles, the holder soft shell is in soft contact with the shell near one end of the bristle holder and shields the gap between the bristle holder and the shell.

[0016] According to another aspect of the present application, an electric toothbrush is further provided, comprising the toothbrush head of any one of the above preferred embodiments and a toothbrush handle, the drive shaft of the toothbrush handle is suitable for fixedly connecting one end of the transmission member, so that the bristle holder is directly connected in drive with the drive shaft.

[0017] Compared with the prior art, the direct drive toothbrush head and the electric toothbrush provided by the present application have at least one of the following beneficial effects:

[0018] 1. The two ends of the transmission member are suitable for directly fixedly connecting the drive shaft of the toothbrush handle and the bristle holder, the vibration of the drive shaft is directly transmitted to the bristle holder through the transmission member, the vibration loss of the bristle holder is small, and the vibration transmission efficiency is high; the bristle holder is arranged in a spaced manner with the shell, the vibration of the bristle holder is not transmitted to the shell, and the shell is prevented from vibrating the oral cavity.

[0019] 2. The transmission member outer side wall and the shell inner side wall are not in direct contact, which can avoid mutual impact between the transmission member and the shell when the transmission member vibrates, reduce the vibration loss of the bristle holder and reduce noise; moreover, the vibration of the transmission member is not transmitted to the shell, the shell does not vibrate during use, and the user's oral cavity is also avoided from being vibrated, so that the use experience is better.

[0020] 3. The transmission member is also not in direct contact with the shaft sleeve, so that the vibration of the transmission member is not transmitted to the shaft sleeve, vibration loss is avoided, the transmission member is avoided from impacting the shaft sleeve, and noise is reduced; the soft shell of the seat body is in soft contact with the shell near one end of the bristle holder and shields the gap between the bristle holder and the shell, so that the appearance of the toothbrush head is more beautiful and more waterproof, and moreover, the soft contact between the soft shell of the seat body and the shell can also avoid the vibration of the bristle holder from being transmitted to the shell through the soft shell of the seat body, so that the shell is avoided from vibrating.

[0021] 4. The hard encapsulation is arranged on the outer side of the transmission rod away from the bristle holder, and the hard encapsulation is provided with a connecting groove at the end away from the bristle holder, the connecting groove being suitable for fixedly connecting the driving shaft of the toothbrush handle, so as to facilitate the direct transmission connection between the transmission member and the driving shaft and improve the durability of the transmission member.

[0022] 5. The bristle holder body connected with the transmission member and the bristle support provided with bristles are fixedly connected, so that the bristle holder body and the bristle support are hard connected, so that the vibration of the transmission member can be directly transmitted to the bristle support through the bristle holder body, and the vibration transmission consumption is small. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above-mentioned characteristics, technical features, advantages and implementation modes of the present application will be further described in the following preferred embodiments in a clear and easy-to-understand manner in combination with the drawings.

[0024] Figure 1 is a whole view of the electric toothbrush;

[0025] Figure 2 is a transmission view of the toothbrush head;

[0026] Figure 3 is a sectional view of the toothbrush head;

[0027] Figure 4 is a position view between the shell and the bristle holder;

[0028] Figure 5 is a structure view of the bristle holder;

[0029] Figure 6 is a structure view of the transmission member.

[0030] BRIEF DESCRIPTION OF DRAWINGS

[0031] Toothbrush head 1, shell 11, accommodating cavity 110, transmission member 12, transmission rod 121, hard encapsulation 122, connecting groove 1221, bristle seat 13, bristle seat body 131, fixing groove 1311, bristle holder 132, bristle 1321, connecting member 133, seat body soft shell 134, shaft sleeve 14, toothbrush handle 2, drive shaft 21, connecting seat 22. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creating labor, and other embodiments can also be obtained.

[0033] In order to make the drawing simple, only the parts related to the present application are shown in the drawings, and they do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0034] It should be further understood that the term "and / or" used in the specification and claims of the present application means one or more of the associated listed terms in any combination and all possible combinations, and includes these combinations.

[0035] In this paper, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. It should be noted that the above embodiments can be freely combined according to the needs. The above is only the preferred embodiment of the present application, and it should be pointed out that for those skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

[0037] Reference Figures 1 to 3The utility model provides a kind of direct drive toothbrush head 1, including shell 11, transmission member 12 and bristle holder 13, shell 11 has the containing cavity 110 of axial both ends opening;Transmission member 12 one end is equipped with connecting groove 1221 and is arranged in the containing cavity 110 of shell 11, the drive shaft 21 of toothbrush handle 2 is suitable for inserting in connecting groove 1221, the other end of transmission member 12 extends containing cavity 110 other end;Bristle holder 13 is spaced apart from shell 11, and bristle holder 13 is equipped with bristle 1321, and bristle holder 13 is fixedly connected the other end of transmission member 12, so that bristle holder 13 and the drive shaft 21 of toothbrush handle 2 are directly driven and connected by transmission member 12.

[0038] In the embodiment, the two ends of the transmission member 12 are suitable for directly fixedly connecting the drive shaft 21 of the toothbrush handle 2 and the bristle holder 13, the vibration of the drive shaft 21 is directly transmitted to the bristle holder 13 through the transmission member 12, the vibration loss of the bristle holder 13 is small, and the vibration transmission efficiency is high; the bristle holder 13 is spaced apart from the shell 11, and the vibration of the bristle holder 13 is not transmitted to the shell 11, avoiding the shell 11 from vibrating the mouth and the lips.

[0039] Specifically, one end of the transmission member 12 penetrates through one end of the shell 11 in the axial direction and is fixedly connected with the bristle holder 13, and the other end of the transmission member 12 is located inside the shell 11 and is adapted to be fixedly connected with the drive shaft 21 of the toothbrush handle 2, so that the bristle holder 13, the transmission member 12 and the drive shaft 21 are all rigidly connected, i.e., are all directly drivingly connected. The vibration of the drive shaft 21 can be directly transmitted to the bristle holder 13 through the transmission member 12. The accommodating cavity 110 of the shell 11 is open at both ends, and the accommodating cavity 110 is provided with a shaft sleeve 14 at one end, and the shaft sleeve 14 is fixedly connected with the inner side wall of the shell 11. The cross section of the shell 11 gradually decreases along the axial direction thereof from the end far away from the bristle holder 13 to the end close to the bristle holder 13. The connecting seat 22 of the toothbrush handle 2 is adapted to be fixedly connected with the shaft sleeve 14 inside the shell 11, so that the drive shaft 21 of the toothbrush handle 2 is connected into the connecting groove 1221 of the transmission member 12 after penetrating through the end opening of the shell 11 and the shaft sleeve 14, so that the transmission member 12 is rigidly connected with the drive shaft 21, and the drive shaft 21 directly transmits the vibration to the transmission member 12. At this time, a gap is also left between the drive shaft 21 and the shaft sleeve 14 to avoid the vibration impact between the drive shaft 21 and the shaft sleeve 14. The specific structure of the shaft sleeve 14 of the connecting seat 22 will not be described further herein, as long as the toothbrush handle 2 can be fixedly connected with the toothbrush head 1. The other end of the transmission member 12 is fixedly connected with the bristle holder 13 provided with the bristles 1321 after penetrating through the other end of the accommodating cavity 110 of the shell 11, so that the transmission member 12 is rigidly connected with the bristle holder 13, and the vibration on the transmission member 12 is directly transmitted to the bristle holder 13, thereby directly driving the bristle holder 13, the transmission member 12 and the drive shaft 21 to vibrate, directly driving the bristle holder 13 to vibrate and reducing the vibration loss of the bristle holder 13. The bristle holder 13 is spaced apart from the shell 11, i.e., the bristle holder 13 is not in direct contact with the shell 11, and the vibration of the bristle holder 13 is not transmitted to the shell 11, thereby avoiding the vibration of the shell 11 to the oral cavity. In the present application, a certain gap space is provided between the end of the bristle holder 13 and the end of the shell 11, so that the end of the bristle holder 13 is not in contact with the end of the shell 11. Of course, a soft rubber member can also be provided between the bristle holder 13 and the shell 11 to fill the gap between the bristle holder 13 and the shell 11 and eliminate the vibration transmission between the bristle holder 13 and the shell 11, thereby achieving the soft contact between the bristle holder 13 and the shell 11.

[0040] Further, referring to Figure 4 and Figure 6 , the transmission member 12 comprises a transmission rod 121 and a hard rubber coating 122, the hard rubber coating 122 is arranged on one end of the transmission rod 121 and is located in the accommodating cavity 110, the end of the hard rubber coating 122 far away from the bristle holder 13 is provided with a connecting groove 1221, and the other end of the transmission rod 121 is fixedly connected with the bristle holder 13.

[0041] In the embodiment, the hard encapsulation 122 is arranged outside the transmission rod 121 away from the bristle holder 13, and the end of the hard encapsulation 122 away from the bristle holder 13 is provided with a connecting groove 1221 adapted to fixedly connect the driving shaft 21 of the toothbrush handle 2, so as to facilitate the direct transmission connection between the transmission member 12 and the driving shaft 21 and improve the durability of the transmission member 12.

[0042] Specifically, the hard encapsulation 122 is arranged outside the part of the transmission rod 121 located in the accommodating cavity 110, and the hard encapsulation 122 is formed outside the transmission rod 121. The hard encapsulation 122 is made of any one of POM, PC and PEEK. Preferably, the hard encapsulation 122 is made of POM. POM is also called racing steel material, which is easy to process and has the characteristics of good rigidity, good toughness and good wear resistance. The transmission rod 121 is preferably made of metal.

[0043] It is worth noting that in the deformed embodiment, the transmission member 12 can also be a whole, and the transmission member 12 is coaxially arranged with the shell 11 and a gap is left between the inner side walls of the transmission member 12. The transmission member 12 directly transmits the driving shaft 21 of the bristle holder 13 and the toothbrush handle 2. At this time, the transmission member 12 is preferably made of metal, and it can also be made of hard materials such as POM. The difference between the present embodiment and the previous embodiment is that the material of the transmission member 12 in the present embodiment is one, i.e. the transmission member 12 is a whole.

[0044] Further, referring to Figure 3 and Figure 4 , the transmission member 12 is coaxially arranged with the shell 11 and the outer side wall of the transmission member 12 is not in direct contact with the inner side wall of the shell 11. Specifically, the outer side wall of the transmission member 12 is not in direct contact with the inner side wall of the shell 11, which can avoid the mutual impact between the transmission member 12 and the shell 11 when the transmission member 12 vibrates, reduce the vibration loss of the bristle holder 13 and reduce the noise. Moreover, it also makes the vibration of the transmission member 12 not transmitted to the shell 11, so that the shell 11 does not vibrate during use, and the user's oral cavity is not vibrated by the shell 11, and the use experience is better.

[0045] In the embodiment, the non-direct contact between the outer side wall of the transmission member 12 and the inner side wall of the shell 11 is achieved by the damping member, which is sleeved on the outer side wall of the transmission member 12 and located between the inner side wall of the shell 11 and the outer side wall of the transmission member 12, and the damping member is in soft contact with the inner side wall of the shell 11. The damping member is arranged in the damping groove on the outer side of the transmission rod 121 of the transmission member 12. When the transmission member 12 vibrates, the damping member is deformed by being pressed, and direct contact between the transmission member 12 and the shell 11 is avoided. The damping member can be arranged on the entire transmission member 12 or on several parts of the transmission member 12, which is not limited in the present application. The damping member eliminates the hard contact between the transmission member 12 and the shell 11, and avoids the influence of the shell 11 on the vibration transmission of the transmission member 12. In the deformed embodiment, the outer side wall of the transmission member 12 except the damping member is spaced apart from the inner side wall of the shell 11, so that the transmission member 12 is not in contact with the shell 11. The present application is not limited in this regard, as long as the two are not in direct contact.

[0046] Meanwhile, referring to Figure 6 , the transmission member 12 is also not in direct contact with the shaft sleeve 14, so that the vibration of the transmission member 12 is not transmitted to the shaft sleeve 14, the vibration loss is reduced, the transmission member 12 is prevented from impacting the shaft sleeve 14, and the noise is reduced. In the embodiment, the non-direct contact between the end of the transmission member 12 and the shaft sleeve 14 can be achieved by the damping member or by the gap, which is similar to the non-direct hard contact between the transmission member 12 and the shell 11, and the present application is not limited in this regard.

[0047] Further, referring to Figure 5 , the bristle holder 13 includes a bristle holder body 131 and a bristle support 132, the bristle support 132 is fixedly installed on the bristle holder body 131, and the bristle holder body 131 is provided with a fixing groove 1311 on the side close to the transmission member 12, which is suitable for interference fit with the end of the transmission member 12 and fixedly connected with the transmission member 12.

[0048] In the embodiment, the bristle holder body 131 connected with the transmission member 12 and the bristle support 132 provided with the bristles 1321 are fixedly connected, so that the bristle holder body 131 and the bristle support 132 are hard connected, and the vibration of the transmission member 12 can be directly transmitted to the bristle support 132 through the bristle holder body 131, and the vibration transmission loss is small.

[0049] Specifically, the bristle seat body 131 and the bristle holder 132 are connected by ultrasonic welding, so the bristle seat 13 and the bristle holder 132 can be regarded as a whole. The connection between the bristle seat body 131 and the transmission member 12 is fixedly connected by the connecting member 133. The other end of the transmission member 12 is also provided with a first connecting hole, and the side wall of the bristle seat body 131 is also provided with a corresponding second connecting hole, and the first connecting hole and the second connecting hole are adapted to install the connecting member 133 and fixedly connect the transmission member 12 and the bristle seat body 131. The connecting member 133 includes but is not limited to a latch, a pin shaft, etc.

[0050] The installation direction of the connecting member 133 is perpendicular to the axial direction of the shell 11, and the connecting member 133 is located opposite to the bottom of the bristle holder 132. The connecting member 133 plays a role of a counterweight to some extent, so that the center of gravity of the bristle seat 13 matches the axis of the transmission member 12, the center of gravity of the bristle seat 13 is more balanced, and the vibration of the bristle seat 13 is more regular and orderly. The side of the bristle seat body 131 close to the transmission member 12 is provided with a fixing groove 1311, and the fixing groove 1311 is adapted to be interference-fitted with the end of the transmission member 12 and fixedly connected with the transmission member 12. The end of the transmission member 12 and the part of the bristle seat body 131 provided with the fixing groove 1311 are fixedly connected by the connecting member 133.

[0051] It is worth noting that the bristle seat body 131 and the bristle holder 132, and the fixed connection mode of the transmission member 12 and the bristle seat body 131 are various, which will not be described here.

[0052] Further, referring to Figure 4 , the bristle seat 13 is further provided with a seat soft shell 134 outside, and the seat soft shell 134 is arranged outside the bristle seat 13 and exposes the bristles 1321. The seat soft shell 134 is in soft contact with the end of the shell 11 close to the bristle seat 13 and shields the gap between the bristle seat 13 and the shell 11.

[0053] In the embodiment, the seat soft shell 134 is in soft contact with the end of the shell close to the bristle seat 13 and shields the gap between the bristle seat 13 and the shell 11, so that the appearance of the toothbrush head 1 is more beautiful and more waterproof. Moreover, the soft contact between the seat soft shell 134 and the shell 11 can also avoid the vibration of the bristle seat 13 being transmitted to the shell 11 through the seat soft shell 134, thereby avoiding the vibration of the shell 11.

[0054] Specifically, the shell 11 is provided with a placing groove outside one end close to the bristle holder 13, and the part of the seat soft shell 134 exceeding the bristle holder 13 is sleeved in the placing groove, so that the overall toothbrush head 1 is in a streamline shape, and the appearance of the toothbrush head 1 is more beautiful. The seat soft shell 134 is in soft contact with the shell 11, that is, when the bristle holder 13 vibrates, the seat soft shell 134 itself deforms to adapt to the vibration of the bristle holder 13, and does not transmit the vibration to the shell 11. Moreover, the seat soft shell 134 just covers the gap between the bristle holder 13 and the shell 11, avoiding liquid from seeping into the gap. The seat soft shell 134 is made of soft rubber material, which is not limited further herein. The seat soft shell 134 is further provided with a third connecting hole, which is suitable for inserting the connecting piece 133.

[0055] Further, referring to Figure 1 The application provides an electric toothbrush, which comprises the toothbrush head 1 and the toothbrush handle 2 of any one of the above preferred embodiments, and the driving shaft 21 of the toothbrush handle 2 is suitable for fixedly connecting one end of the transmission piece 12, so that the bristle holder 13 is directly driven and connected with the driving shaft 21.

[0056] It should be noted that the above embodiments can be freely combined according to needs. The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A direct drive toothbrush head, characterized by, The utility model relates to a direct drive toothbrush head, comprising: a shell having an accommodating cavity open at both axial ends; a transmission member provided in the accommodating cavity of the shell and having a connecting groove at one end for inserting a drive shaft of a toothbrush handle, the other end of the transmission member extending out of the other end of the accommodating cavity; a bristle holder spaced apart from the shell and having bristles, the bristle holder being fixedly connected to the other end of the transmission member so that the bristle holder and the drive shaft of the toothbrush handle are directly drivingly connected through the transmission member.

2. The direct drive toothbrush head according to claim 1, wherein: the transmission member comprises a transmission rod and a hard encapsulation, the hard encapsulation being provided outside one end of the transmission rod and located opposite in the accommodating cavity, the hard encapsulation being provided with the connecting groove at the end away from the bristle holder, and the other end of the transmission rod being fixedly connected to the bristle holder.

3. The direct drive toothbrush head according to claim 2, wherein: the hard encapsulation is made of any one of POM, PC and PEEK.

4. The direct drive toothbrush head according to claim 2, wherein: the transmission member is coaxially arranged with the shell, and the outer wall of the transmission member is not in direct contact with the inner wall of the shell; one end of the accommodating cavity is provided with a shaft sleeve adapted to connect the toothbrush handle, and the transmission member is not in direct contact with the shaft sleeve.

5. The direct drive toothbrush head according to claim 1, wherein: the transmission member is an integral whole, the transmission member is coaxially arranged with the shell, and a gap is left between the inner walls of the transmission member, the transmission member directly drivingly connecting the bristle holder and the drive shaft of the toothbrush handle.

6. The direct drive toothbrush head according to any one of claims 1-5, wherein: the bristle holder comprises a bristle holder body and a bristle support, the bristle support being fixedly mounted on the bristle holder body, the bristle support being provided with bristles, and the bristle holder body being provided with a fixing groove on the side close to the transmission member, the fixing groove being adapted to be in interference fit with the end of the transmission member and fixedly connected to the transmission member.

7. The direct drive toothbrush head according to claim 6, wherein: the other end of the transmission member is further provided with a first connecting hole, and the side wall of the bristle holder body is also correspondingly provided with a second connecting hole, the first connecting hole and the second connecting hole being adapted to mount a connecting member and fixedly connect the transmission member and the bristle holder body.

8. The direct drive toothbrush head according to claim 7, wherein: the mounting direction of the connecting member is perpendicular to the axial direction of the shell, and the connecting member is located opposite to the bottom of the bristle support.

9. The direct drive toothbrush head according to claim 6, wherein: the bristle holder is further provided with a seat body soft shell outside, the seat body soft shell being provided outside the bristle holder and exposing the bristles, the seat body soft shell being in soft contact with the shell at the end close to the bristle holder and shielding the gap between the bristle holder and the shell.

10. An electric toothbrush characterized by comprising: The toothbrush head of any one of claims 1-9 and a toothbrush handle, the drive shaft of the toothbrush handle being adapted to fixedly connect one end of the transmission member such that the bristle carrier is directly drivingly connected to the drive shaft.

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