Hand-held dental instrument handle

Abstract

The utility model belongs to the technical field of dental instruments, and relates to a handheld dental instrument handle which comprises an upper shell and a lower shell, the upper shell and the lower shell are closed to form a mounting cavity, a circuit board, a fixing piece and a connecting piece are arranged in the mounting cavity, a first connecting part is arranged on the upper shell, and a second connecting part is arranged on the lower shell; the connecting piece penetrates through the first connecting part, the second connecting part and the circuit board and then is fixedly connected with the fixing piece; according to the technical scheme, the upper shell and the lower shell can be fixed together through the fixing piece and the connecting piece which are arranged in the mounting cavity, the circuit board can be fixed in the upper shell and the lower shell, the structure is compact, connection is firm, and the service life is long. Meanwhile, the connecting piece is not arranged on the peripheral face, making contact with the hand in the using process and making contact with the outside in the placing process, of the upper shell or the lower shell, so that the connecting piece does not make contact with a user and external instruments, and the risk that static electricity is transmitted to the interior through the connecting piece, and consequently parts such as an internal circuit board fail is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of dental instruments, and more specifically, to a handheld dental instrument handle. Background Art

[0002] The handle of a handheld dental instrument is a tool used by dentists during diagnosis and treatment. It is usually used to operate dental instruments, such as irrigators, root canal preparation machines, tooth scalers, hot gutta-percha filling machines and hot gutta-percha cutters. The handle of a handheld dental instrument needs to be inserted into the oral cavity and needs to be disinfected after use.

[0003] The prior art discloses a dental mobile phone handle shell structure, including a combined shell composed of a first shell and a second shell, and the first shell and the second shell are fixed by externally mounted mounting bolts. However, during use, when there is static electricity on the outer surface of the handle, it will be transmitted to the inside through the mounting bolts, causing the internal circuit board and other parts to have a risk of failure. Utility Model Content

[0004] The technical problem to be solved by the technical solution of this application is that in the prior art, when the mounting bolts are exposed on the outer surface of the outer handle and static electricity is present, it will be transmitted to the inside through the mounting bolts, causing the risk of failure of parts such as the internal circuit board. At the same time, holes need to be opened on the surface to accommodate the mounting bolts, which is not aesthetically pleasing.

[0005] In order to solve the above technical problems, an embodiment of the present application provides a handheld dental instrument handle, which adopts the technical solution described below, including: an upper shell and a lower shell, the upper shell and the lower shell are covered to form an installation cavity, a circuit board and a fixing part and a connecting part are arranged in the installation cavity, a first connecting part is arranged on the upper shell and a second connecting part is arranged on the lower shell, and the connecting part is fixedly connected to the fixing part after passing through the first connecting part, the second connecting part and the circuit board.

[0006] Furthermore, a support seat is provided in the installation cavity, and the support seat is used to support the circuit board. The connecting member passes through the first connecting part, the second connecting part, the support seat and the circuit board and is fixedly connected to the fixing member.

[0007] Furthermore, the installation cavity is provided with at least one end opening, and the support seat is arranged at the opening of the installation cavity.

[0008] Furthermore, the connecting member is configured as a bolt, the fixing member is configured as a fixing plate, the fixing plate is provided with a screw hole connected to the bolt, and the bolt passes through the first connecting part, the second connecting part and the circuit board and is threadedly connected to the screw hole on the fixing plate.

[0009] Furthermore, the fixing plate has a "U"-shaped structure, and the bolts, screw holes, first connecting parts and second connecting parts are respectively provided with two, and the two screw holes are respectively provided at both ends of the fixing plate, and the bolts pass through the first connecting part, the second connecting part and the circuit board one by one and are threadedly connected with the screw holes.

[0010] Furthermore, a fixing plate groove for placing the fixing plate is provided in the installation cavity.

[0011] Furthermore, a raised support rib is provided in the installation cavity, and a support groove matched with the support rib is provided on the circuit board.

[0012] Furthermore, the connecting member is configured as a bolt, the fixing member is configured as a fixing nut, the fixing nut is fixed in the installation cavity, and the bolt passes through the first connecting part, the second connecting part and the circuit board and is threadedly connected to the fixing nut.

[0013] Furthermore, a nut groove for accommodating the fixing nut is provided in the installation cavity.

[0014] Furthermore, a slot is provided in the installation cavity, and an insert piece matched with the slot is provided on the circuit board, and the insert piece is inserted in the slot to limit the circumferential rotation of the circuit board.

[0015] Furthermore, a circuit board is sleeved on the upper shell and the lower shell, and bipolar circuits are spaced apart on the circuit board. A silicone sleeve is sleeved outside the circuit board, and a conductive spring is sleeved inside the silicone sleeve. When the silicone sleeve is not subjected to force, the circuit board and the conductive spring are in a non-contact state. When the silicone sleeve is pressed, the silicone sleeve is deformed and drives the conductive spring to contact the circuit board, so that the bipolar circuits on the circuit board are conductive.

[0016] Furthermore, the upper shell and the lower shell are connected by a first buckle, and the front ends of the upper shell and the lower shell are also provided with a snap ring for fixing the upper shell and the lower shell, and the snap ring is connected to the upper shell and the lower shell by a second buckle or thread.

[0017] Furthermore, the connecting member is axially arranged along the central axis of the upper shell and the lower shell.

[0018] Compared with the prior art, the present application has the following beneficial effects: the connecting member in the present application passes through the first connecting part, the second connecting part and the circuit board and is fixedly connected with the fixing member, so that the fixing member and the connecting member arranged in the installation cavity fix the upper shell and the lower shell together, and can also connect the circuit board with the above-mentioned connection structure together, with a compact structure and a firm connection. At the same time, the connecting member is not arranged on the outer peripheral surface of the upper shell or the lower shell that contacts the hand when in use and contacts the outside when placed, so the connecting member will not contact the user and external equipment, avoiding the risk of static electricity being transmitted to the inside through the connecting member, causing failure of parts such as the internal circuit board. At the same time, there is no need to open holes on the outer peripheral surface of the handle, so that the upper shell and the lower shell can be arranged as one piece, thereby enhancing the strength of the upper shell and the lower shell and facilitating various designs of the upper shell and the lower shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the scheme of the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is an exploded view of the first embodiment of the handheld dental instrument handle of the present application;

[0021] Figure 2 is a transverse cross-sectional view of the first embodiment of the handheld dental instrument handle of the present application;

[0022] Figure 3 yes Figure 2 A is an enlarged schematic diagram;

[0023] Figure 4 yes Figure 2 A magnified schematic diagram of B;

[0024] Figure 5 is a longitudinal cross-sectional view of the first embodiment of the handheld dental instrument handle of the present application;

[0025] Figure 6 It is a front view of the circuit board in an unfolded state;

[0026] Figure 7 is an exploded view of the second embodiment of the handheld dental instrument handle of the present application;

[0027] Figure 8 is a transverse cross-sectional view of the second embodiment of the handheld dental instrument handle of the present application;

[0028] Fig. 9 yes Figure 8 A magnified schematic diagram of middle C;

[0029] Fig.10 It is a longitudinal cross-sectional view of the second embodiment of the handheld dental instrument handle of the present application.

[0030] Figure numerals: 1. shell; 2. circuit board; 3. support seat; 4. bolt; 5. fixing plate; 6. fixing nut; 7. circuit board; 8. silicone sleeve; 9. conductive spring; 10. snap ring; 11. installation cavity; 12. fixing plate groove; 13. supporting rib; 15. nut groove; 16. slot; 20. supporting groove; 30. insert; 51. screw hole; 101. upper shell; 102. lower shell; 103. first connecting part; 104. second connecting part; 121. convex rib; 200. first buckle; 300. second buckle. DETAILED DESCRIPTION

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0034] Embodiment 1 of the handheld dental instrument handle of the present application

[0035] As attached Figures 1 to 6As shown, an embodiment of the present application provides a handheld dental instrument handle, comprising: an upper shell 101 and a lower shell 102, wherein the upper shell 101 and the lower shell 102 are covered to form an installation cavity 11, wherein a circuit board 2, a fixing member and a connecting member are arranged in the installation cavity 11, a first connecting portion 103 is arranged on the upper shell 101, and a second connecting portion 104 is arranged on the lower shell 102, wherein the connecting member passes through the first connecting portion 103, the second connecting portion 104 and the circuit board 2 and is fixedly connected to the fixing member.

[0036] The present application fixes the upper shell 101 and the lower shell 102 together by means of fixing parts and connecting parts arranged in the installation cavity 11, and can also connect the circuit board 2 to the above-mentioned connection structure. The structure is compact and the connection is firm. At the same time, the connecting parts are not arranged on the outer peripheral surface of the upper shell 101 or the lower shell 102 that contacts the hand when in use and contacts the outside when placed. Therefore, the connecting parts will not contact the user and external equipment, avoiding the risk of static electricity being transmitted to the inside through the connecting parts, causing failure of parts such as the internal circuit board. At the same time, there is no need to open holes on the outer peripheral surface of the handle, so that the upper shell 101 and the lower shell 102 can be arranged as a whole, thereby enhancing the strength of the upper shell 101 and the lower shell 102 and facilitating various designs of the upper shell 101 and the lower shell 102.

[0037] As attached Figures 1 to 6 As shown, further, a support seat 3 is also provided in the installation cavity 11, and the support seat 3 is used to support the circuit board 2. The connector passes through the first connecting portion 103, the second connecting portion 104, the support seat 3 and the circuit board 2 and is fixedly connected to the fixing member. The installation cavity 11 is provided with at least one opening, and the support seat 3 covers the opening of the installation cavity 12. The opening at one end is convenient for installing other structures, such as the handle battery structure, the handle tail and other structures, so as to realize the assembly of various parts from the installation cavity 11 with one end opening, which is convenient for assembly. The support seat 3 is used to support the circuit board 2 and protect the circuit board 2. At the same time, electrical connectors such as guide ejectors are installed on the support seat 3. The guide ejectors are electrically connected to the circuit board 2, and the guide ejectors are used to take electricity and receive signals. The fixing member and the connector are used to fix the upper shell 101 and the lower shell 102 together and fix the circuit board 2 in the installation cavity 11 of the upper shell 101 and the lower shell 102.

[0038] As attached Figures 1 to 3As shown, further, the connecting member is configured as a bolt 4, the fixing member is configured as a fixing plate 5, the fixing plate 5 is arranged in the installation cavity 11, and a screw hole 51 connected to the bolt 4 is arranged on the fixing plate 5. The bolt 4 passes through the first connecting portion 103, the second connecting portion 104 and the circuit board 2 and is threadedly connected with the screw hole 51 on the fixing plate 5. By providing the fixing plate 5, the bolt 4 has an anchor point that can be fixed, so that the bolt 4 can fix the circuit board 2 and the support seat 3 on the upper shell 101 and the lower shell 102.

[0039] Furthermore, the circuit board 2 and the support seat 3 are respectively provided with through holes for the bolts 4 to pass through, and the bolts 4 pass through the first connection portion 103, the second connection portion 104, the support seat 3 and the circuit board 2 and are threadedly connected with the screw holes 51 on the fixing plate 5. The fixing plate 5 is made of metal material, which enhances the strength of the fixing plate 5, prevents the bolts 4 from being screwed on materials such as plastic, and prevents the problem of thread slippage due to long-term use, thereby extending the service life.

[0040] Furthermore, the fixing plate 5 is in a "U"-shaped structure, and the bolt 4, the screw hole 51, the first connection part 103 and the second connection part 104 are respectively provided with two, and the two screw holes 51 are respectively provided at the two ends of the fixing plate 5, and the bolt 4 passes through the first connection part 103, the second connection part 104, the support seat 3 and the circuit board 2 one by one and then is threadedly connected with the screw hole 51. The fixing plate 5 with a "U"-shaped structure not only reduces the overall volume of the fixing plate 5, which is conducive to reducing the overall weight of the handheld dental instrument handle and reducing the manufacturing cost, but also the "U"-shaped structure allows the fixing plate 5 to fit closely to the inner wall of the mounting cavity 11, and the middle vacant position of the "U"-shaped structure can be very conveniently connected by wires from the circuit board 2, and the structure is more compact and firmly fixed, which effectively prevents the loosening of the circuit board 2, the support seat 3 and the fixing plate 5 and other parts.

[0041] Furthermore, a fixing plate slot 12 for placing the fixing plate 5 to limit its axial movement is provided in the installation cavity 11. The fixing plate 5 is detachably connected to the upper shell 101 and the lower shell 102, and the fixing plate slot 12 is provided as a structure with one side open, which is convenient for the disassembly and assembly of the fixing plate 5. At the same time, a raised rib 121 for forming the fixing plate slot 12 is provided on the inner wall of the installation cavity 11. The rib 121 can not only limit the axial movement of the fixing plate 5, so as to limit the axial movement of the circuit board 2 and the support seat 3 after connection, and prevent the circuit board 2 and the support seat 3 from falling out, but also the rib 121 can strengthen the strength of the upper shell 101 and the lower shell 102, and prevent the upper shell 101 and the lower shell 102 from deformation.

[0042] Furthermore, a raised support rib 13 is provided in the installation cavity 11, and a support groove 20 matching the support rib 13 is provided on the circuit board 2. A support groove 20 matching the support rib 13 is also provided on the support seat 3. When connected, the support rib 13 is inserted into the support groove 20, which limits the circumferential rotation of the circuit board 2 and the support seat 3, and further fixes the circuit board 2 and the support seat 3.

[0043] Furthermore, the upper shell 101 and the lower shell 102 are also sleeved with a circuit board 7, on which two-pole circuits are arranged at intervals, and a silicone sleeve 8 is arranged outside the circuit board 7, and a conductive spring 9 is arranged inside the silicone sleeve 8; when the silicone sleeve 8 is not subjected to force, the circuit board 7 and the conductive spring 9 are in a non-contact state; when the silicone sleeve 8 is pressed, the silicone sleeve 8 is deformed and drives the conductive spring 9 to contact the circuit board 7, so that the two-pole circuits on the circuit board 7 are conductive. When in use, the silicone sleeve 8 can be pressed at any angle position on its outer circumference to energize, and when the hand is released, the conductive spring 9 returns to its original state with the rebound of the silicone sleeve 8, which can facilitate doctors to frequently adjust the use angle of the handle of the handheld dental instrument when treating teeth, avoid the inconvenience caused by the dead angle of the button during continuous operation, and allow doctors to adjust the angle 360 ​​degrees arbitrarily during the operation, uninterrupted treatment, shorten the treatment time, and improve the treatment efficiency. At the same time, it also reduces the space occupied by the switch, facilitates the user's operation, and improves the user experience.

[0044] Furthermore, the circuit board 7 is a flexible circuit board. In the prior art, the circuit board is installed in a groove opened on the elastic rubber sleeve. The groove is provided to ensure that the elastic rubber sleeve always has a certain elasticity. The circuit board 7 of the present application is directly on the outer peripheral surface of the upper shell 101 and the lower shell 102, and is located outside the groove of the silicone sleeve 8. The width of the circuit board 7 is greater than the width of the groove of the silicone sleeve 8. Compared with the prior art solution, the installation method of the circuit board 7 of the present application is convenient for welding and wiring at both ends of the circuit board 7. At the same time, the wiring area is larger, the wiring is firm, and the reliability is higher.

[0045] Furthermore, the upper shell 101 and the lower shell 102 are connected by a first buckle 200, and the front ends of the upper shell 101 and the lower shell 102 are also provided with a snap ring 10 for fixing the upper shell 101 and the lower shell 102, and the snap ring 10 is connected to the upper shell 101 and the lower shell 102 by threads. The upper shell 101 and the lower shell 102 are covered to form the housing 1, and after the connection, the buckle and the thread are all arranged inside the upper shell 101 and the lower shell 102 or the snap ring 10, and the buckle, thread and bolt are not exposed on the outside of the handle, and there is no need to open holes on the outer peripheral surface of the handle, so that the upper shell 101 and the lower shell 102 can be arranged as a whole, the strength of the upper shell 101 and the lower shell 102 is enhanced, and various designs of the upper shell 101 and the lower shell 102 are convenient.

[0046] Furthermore, in this embodiment, the clamping ring 10 is connected to the upper shell 101 and the lower shell 102 by threads, and after the connection, the silicone sleeve 8 is also sleeved on the clamping ring 10 to improve the overall aesthetics. At the same time, a circle of notched grooves or raised structures are provided on the outer circumference of the silicone sleeve 8, and the notched grooves or raised structures are provided corresponding to the conductive spring 9, which is convenient for the user's hand to sense the pressing position during use and accurately press to turn on the power.

[0047] Furthermore, the first connecting portion 103 and the second connecting portion 104 are staggered on the axis of the handheld dental instrument handle, and the first connecting portion 103 and the second connecting portion 104 are also located between the circuit board 2 and the fixing plate 5. When connected, the bolt 4 passes through the support seat 3, the circuit board 2, the first connecting portion 103 and the second connecting portion 104 in sequence and is threadedly connected to the screw hole 51.

[0048] Furthermore, the connector is axially arranged along the central axis of the upper shell and the lower shell, so that the various parts can be assembled from the installation cavity 11 with an opening at one end, which is convenient for assembly. At the same time, the connector is arranged at the opening of the installation cavity 11, and the connector is not arranged on the outer peripheral surface of the upper shell 101 or the lower shell 102 that contacts the hand when in use and contacts the outside when placed, so the connector will not contact the user and external equipment, avoiding the risk of static electricity being transmitted to the inside through the connector, causing the internal circuit board and other parts to fail. At the same time, there is no need to open holes on the outer peripheral surface of the handle, so that the upper shell 101 and the lower shell 102 can be arranged as a whole, thereby enhancing the strength of the upper shell 101 and the lower shell 102, and facilitating various designs of the upper shell 101 and the lower shell 102.

[0049] During assembly, first put the fixing plate 5 into the fixing plate groove 12 of the lower shell 102, then insert the circuit board 2 and the support seat 3 into the lower shell 102 respectively, so that the support rib 13 of the lower shell 102 is inserted into the support groove 20, and then the upper shell 101 is buckled on the lower shell 102 through the first buckle 200, and then the bolt 4 is screwed into the rear end of the upper shell 101 and the lower shell 102, so that the bolt 4 passes through the support seat 3, the circuit board 2, the first connecting part 103 and the second connecting part 104 in sequence and is threadedly connected with the screw hole 51; then the retaining ring 10 is threadedly connected to the front end of the upper shell 101 and the lower shell 102, and then the circuit board 7 is pasted to the front end of the upper shell 101 and the lower shell 102 with double-sided tape, and finally, the conductive spring 9 is installed in the corresponding groove of the silicone sleeve 8, and then the silicone sleeve 8 is sleeved on the front end of the upper shell 101 and the lower shell 102 to complete the assembly.

[0050] Embodiment 2 of the handheld dental instrument handle of the present application

[0051] As attached Figures 7 to 10 As shown, the difference between the second embodiment and the first embodiment is the fixing member. The first embodiment has a fixing plate 5 , while the second embodiment has a fixing nut 6 .

[0052] Further, the connecting member is configured as a bolt 4, the fixing member is configured as a fixing nut 6, the fixing nut 6 is fixed in the installation cavity 11, and the bolt 4 passes through the first connecting portion 103, the second connecting portion 104, the support seat 3 and the circuit board 2 and is threadedly connected with the fixing nut 6. By providing the fixing nut 6, the bolt 4 has an anchor point that can be fixed, so that the bolt 4 can fix the circuit board 2 and the support seat 3 on the upper shell 101 and the lower shell 102.

[0053] Furthermore, the circuit board 2 and the support base 3 are respectively provided with through holes for the bolt 4 to pass through, and the fixing nut 6 is made of metal material, which enhances the strength of the fixing nut 6, prevents the bolt 4 from being screwed on plastic and other materials, and prevents the problem of thread slippage due to long-term use, thereby extending the service life.

[0054] Furthermore, a nut slot 15 for placing the fixing nut 6 to limit its circumferential rotation is provided in the installation cavity 11. The fixing nut 6 is detachably connected to the upper shell 101 and the lower shell 102, and the nut slot 15 is provided with a structure with one end open to facilitate the disassembly and assembly of the fixing nut 6. At the same time, a raised limiting portion is provided on the fixing nut 6, and the limiting portion is adapted to the limiting hole in the nut slot 15 to prevent the fixing nut 6 from circumferentially rotating when the bolt 4 is screwed in.

[0055] Furthermore, a slot 16 is further provided in the installation cavity 11, a plug 30 matching the slot 16 is provided on the circuit board 2, and a plug 30 matching the slot 16 is also provided on the support seat 3, and the plug 30 is inserted in the slot 16 to limit the circumferential rotation of the circuit board 2 and the support seat 3. When connected, the plug 30 is inserted in the slot 16, limiting the circumferential rotation of the circuit board 2 and the support seat 3, and further fixing the circuit board 2 and the support seat 3.

[0056] Furthermore, the upper shell 101 and the lower shell 102 are also sleeved with a circuit board 7, on which a bipolar circuit is arranged, and a silicone sleeve 8 is provided outside the circuit board 7, and a conductive spring 9 is arranged inside the silicone sleeve 8; when the silicone sleeve 8 is not subjected to force, the circuit board 7 and the conductive spring 9 are in a non-contact state; when the silicone sleeve 8 is pressed, the silicone sleeve 8 is deformed and drives the conductive spring 9 to contact the circuit board 7, so that the bipolar circuit on the circuit board 7 is conductive. Furthermore, the circuit board 7, the silicone sleeve 8, and the conductive spring 9 are not shown in the drawings of the second embodiment. When in use, the silicone sleeve 8 can be pressed at any position on its 360-degree outer circumference to energize it. When the hand is released, the conductive spring 9 returns to its original state as the silicone sleeve 8 rebounds. This makes it convenient for doctors to frequently adjust the use angle of the handle of the handheld dental instrument when treating teeth, avoiding the inconvenience caused by dead angles of buttons during continuous operation. During the operation, the doctor can adjust the angle 360 ​​degrees at will, provide uninterrupted treatment, shorten treatment time, and improve treatment efficiency. At the same time, it also reduces the space occupied by the switch, facilitates the user's operation, and improves the user experience.

[0057] Furthermore, the upper shell 101 and the lower shell 102 are connected by a first buckle 200, and the front ends of the upper shell 101 and the lower shell 102 are also provided with a buckle 10 for fixing the upper shell 101 and the lower shell 102, and the buckle 10 and the upper shell 101 and the lower shell 102 are connected by a second buckle 300. The upper shell 101 and the lower shell 102 are covered to form the housing 1, and after the connection, the buckle and the thread are all arranged inside the upper shell 101 and the lower shell 102 or the buckle 10, and the buckle, thread and bolt are not exposed outside. At the same time, there is no need to open a hole on the outer peripheral surface of the handle, so that the upper shell 101 and the lower shell 102 can be arranged as a whole, the strength of the upper shell 101 and the lower shell 102 is enhanced, and various designs of the upper shell 101 and the lower shell 102 are convenient.

[0058] Furthermore, in this embodiment, the clamping ring 10 is connected to the upper shell 101 and the lower shell 102 via a second buckle 300. The mounting cavity 11 is also provided with a first connecting portion 103 located on the upper shell 101 and a second connecting portion 104 located on the lower shell 102. The first connecting portion 103 and the second connecting portion 104 are staggered on the axis of the handle of the handheld dental instrument. At the same time, the first connecting portion 103 is located on the end of the nut groove 15 away from the second connecting portion 104. The first connecting portion 103 is connected to the nut groove 15. The second connecting portion 104 is located between the nut groove 15 and the circuit board 2. When connected, the bolt 4 passes through the support seat 3, the circuit board 2 and the second connecting portion 104 in sequence and is threadedly connected to the screw hole 51. The protruding bolt 4 after connection is inserted into the first connecting portion 103; the lower shell 102 can also fix the fixing nut 6 in the nut groove 15 to limit the movement of the fixing nut 6 along its axial direction.

[0059] Furthermore, the connector is axially arranged along the central axis of the upper shell and the lower shell, so that the various parts can be assembled from the installation cavity 11 with an opening at one end, which is convenient for assembly. At the same time, the connector is arranged at the opening of the installation cavity 11, and the connector is not arranged on the outer peripheral surface of the upper shell 101 or the lower shell 102 that contacts the hand when in use and contacts the outside when placed, so the connector will not contact the user and external equipment, avoiding the risk of static electricity being transmitted to the inside through the connector, causing the internal circuit board and other parts to fail. At the same time, there is no need to open holes on the outer peripheral surface of the handle, so that the upper shell 101 and the lower shell 102 can be arranged as a whole, strengthening the strength of the upper shell 101 and the lower shell 102, and facilitating various designs of the upper shell 101 and the lower shell 102.

[0060] During assembly, first place the fixing nut 6 into the nut groove 15 of the lower shell 102, then insert the circuit board 2 and the support seat 3 into the lower shell 102 respectively, so that the inserts 30 of the circuit board 2 and the support seat 3 are respectively inserted into the slots 16 of the lower shell 102, and the upper shell 101 is buckled on the lower shell 102 through the first buckle 200, and then the bolt 4 is screwed in from the rear end of the upper shell 101 and the lower shell 102, so that the bolt 4 passes through the support seat 3, the circuit board 2 and the second connecting part 104 in turn and is threadedly connected to the screw hole 51, and the protruding bolt 4 after connection is inserted into the first connecting part 103; then the retaining ring 10 is connected to the second buckle 300 at the front end of the upper shell 101 and the lower shell 102 to complete the assembly.

[0061] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A handheld dental instrument handle, comprising: An upper shell (101) and a lower shell (102), wherein the upper shell (101) and the lower shell (102) are covered to form an installation cavity (11), characterized in that a circuit board (2) and a fixing member and a connecting member are arranged in the installation cavity (11), a first connecting portion (103) is arranged on the upper shell (101) and a second connecting portion (104) is arranged on the lower shell (102), and the connecting member passes through the first connecting portion (103), the second connecting portion (104) and the circuit board (2) and is fixedly connected to the fixing member.

2. The handheld dental instrument handle according to claim 1, characterized in that: A support seat (3) is also provided in the installation cavity (11), and the support seat (3) is used to support the circuit board (2). The connecting member passes through the first connecting portion (103), the second connecting portion (104), the support seat (3) and the circuit board (2) and is fixedly connected to the fixing member.

3. The handheld dental instrument handle according to claim 2, characterized in that: The installation cavity (11) is provided with at least one end opening, and the support seat (3) is arranged at the opening of the installation cavity (11).

4. The handheld dental instrument handle according to claim 1, characterized in that: The connecting member is configured as a bolt (4), the fixing member is configured as a fixing plate (5), the fixing plate (5) is provided with a screw hole (51) connected to the bolt (4), and the bolt (4) passes through the first connecting portion (103), the second connecting portion (104) and the circuit board (2) and is threadedly connected to the screw hole (51) on the fixing plate (5).

5. The handheld dental instrument handle according to claim 4, characterized in that: The fixing plate (5) is in a "U"-shaped structure. The bolts (4), screw holes (51), first connecting parts (103) and second connecting parts (104) are respectively provided with two. The two screw holes (51) are respectively provided at two ends of the fixing plate (5). The bolts (4) pass through the first connecting part (103), the second connecting part (104) and the circuit board (2) one by one and are then threadedly connected with the screw holes (51).

6. The handheld dental instrument handle according to claim 4, characterized in that: A fixing plate groove (12) for placing the fixing plate (5) is provided in the installation cavity (11).

7. The handheld dental instrument handle according to claim 2, characterized in that: A raised support rib (13) is also provided in the installation cavity (11), and a support groove (20) adapted to the support rib (13) is provided on the circuit board (2).

8. The handheld dental instrument handle according to claim 1, characterized in that: The connecting member is configured as a bolt (4), the fixing member is configured as a fixing nut (6), the fixing nut (6) is fixed in the installation cavity (11), and the bolt (4) passes through the first connecting portion (103), the second connecting portion (104) and the circuit board (2) and is threadedly connected to the fixing nut (6).

9. The handheld dental instrument handle according to claim 8, characterized in that: A nut groove (15) for accommodating the fixing nut (6) is provided in the installation cavity (11).

10. The handheld dental instrument handle according to claim 7, characterized in that: A slot (16) is also provided in the installation cavity (11), and an inserting piece (30) adapted to the slot (16) is provided on the circuit board (2); the inserting piece (30) is inserted in the slot (16) to limit the circumferential rotation of the circuit board (2).

11. The handheld dental instrument handle according to any one of claims 1 to 8, characterized in that: A circuit board (7) is also sleeved on the upper shell (101) and the lower shell (102), and two-pole circuits are arranged at intervals on the circuit board (7). A silicone sleeve (8) is provided on the outer shell of the circuit board (7), and a conductive spring (9) is arranged inside the silicone sleeve (8); when the silicone sleeve (8) is not subjected to force, the circuit board (7) and the conductive spring (9) are in a non-contact state; when the silicone sleeve (8) is pressed, the silicone sleeve (8) is deformed and drives the conductive spring (9) to contact the circuit board (7), so that the two-pole circuits on the circuit board (7) are conductive.

12. The handheld dental instrument handle according to any one of claims 1 to 8, characterized in that: The upper shell (101) and the lower shell (102) are connected via a first buckle (200); a buckle ring (10) for fixing the upper shell (101) and the lower shell (102) is also provided at the front end of the upper shell (101) and the lower shell (102); the buckle ring (10) and the upper shell (101) and the lower shell (102) are connected via a second buckle (300) or a thread.

13. The handheld dental instrument handle according to any one of claims 1 to 8, characterized in that: The connecting member is axially arranged along the central axis of the upper shell (101) and the lower shell (102).

Images