Contra-angle handpiece connection structure and dental contra-angle handpiece

Abstract

The embodiment of the present invention provides a contra-angle handpiece connection structure and a dental contra-angle handpiece, and relates to the technical field of medical devices. The contra-angle handpiece connection structure provided by the embodiment of the present invention includes a connecting sleeve, an insulating sleeve, a handle ring, a conductive ring and a light-emitting component. The two ends of the handle ring are respectively provided with limiting parts of the connecting part, the insulating sleeve is connected to the connecting part, the connecting sleeve is located on the inner side of the handle ring, and the two ends of the connecting sleeve are respectively abutted against the limiting part and the insulating sleeve to limit the connecting sleeve. The light-emitting component is installed in the installation space, and the first opening is used to connect the optical fiber of the contra-angle handpiece head with the installation space, so that the light emitted by the light-emitting component enters the optical fiber through the first opening and is transmitted in the optical fiber for lighting. When the light-emitting component rotates relative to the conductive ring with the connecting sleeve, the light-emitting component and the conductive ring are always connected. The contra-angle handpiece connection structure realizes that the contra-angle handpiece head can rotate 360° relative to the contra-angle handpiece handle. During the rotation process, the lighting function is not affected, and it is easy to use and has good effect.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a contra-angle handpiece connection structure and a dental contra-angle handpiece. Background Art

[0002] Root canal treatment is an important method of tooth repair in the dental field. Root canal treatment refers to a treatment method for pulp disease and periapical periodontitis. The working principle is to remove the inflamed pulp and necrotic tissue in the root canal, flush the gutta-percha and paste into the root canal to prevent bacterial invasion. It can effectively prevent the occurrence of periapical periodontitis and promote the healing of periapical periodontitis. Root canal treatment is currently the first choice and the main treatment method for tooth inflammation.

[0003] When performing root canal treatment, dentists need to observe the human oral cavity to ensure the correct operation position, so they need to set up a light source for illumination during treatment. For example, when performing root canal preparation, the operation is performed through a root canal preparation machine, and doctors generally need to use an external light fixture bracket when using the root canal preparation machine, which is inconvenient to use. Summary of the invention

[0004] The purpose of the present invention includes, for example, providing a bending machine connection structure, which can improve the above-mentioned technical problems existing in the prior art.

[0005] The purpose of the present invention also includes providing a dental contra-angle handpiece, which can improve the above-mentioned technical problems existing in the prior art.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] An embodiment of the present invention provides a contra-angle hand machine connection structure, which is used to connect a contra-angle hand machine head and a contra-angle hand machine handle. The contra-angle hand machine connection structure comprises a connection sleeve, an insulating sleeve, a handle ring, a conductive ring and a light-emitting member. The connection sleeve is used to connect the contra-angle hand machine head, and the insulating sleeve is used to connect the contra-angle hand machine handle; a connection portion and a limiting portion are respectively provided at both ends of the handle ring, the insulating sleeve is connected to the connection portion, the connection sleeve is located on the inner side of the handle ring, and the two ends of the connection sleeve are respectively abutted against the limiting portion and the insulating sleeve, so as to limit the connection sleeve between the insulating sleeve and the limiting portion;

[0008] The connecting sleeve is provided with an installation space and a first opening connected with the installation space, the light-emitting component is installed in the installation space, and the first opening is used to connect the optical fiber of the bending machine head with the installation space; the light-emitting component is electrically connected with the conductive ring, and when the light-emitting component rotates relative to the conductive ring with the connecting sleeve, the light-emitting component and the conductive ring are always connected.

[0009] Optionally, the connecting sleeve includes a fastener and a handle fixing ring, a groove is formed at one end of the handle fixing ring, and the fastener is fastened to the handle fixing ring to form the installation space with the groove; the first opening is formed in the fastener; and the two ends of the handle fixing ring are respectively abutted against the limiting portion and the insulating sleeve.

[0010] Optionally, the connecting sleeve is provided with a first mounting protrusion, which abuts against the insulating sleeve; the insulating sleeve is provided with a second mounting protrusion, which is spaced apart from the first mounting protrusion to form an annular space for accommodating the conductive ring; the connecting sleeve is provided with a second opening connecting the annular space and the mounting space, and the wire of the light-emitting component is passed through the second opening to be electrically connected to the conductive ring.

[0011] Optionally, the bending machine connection structure also includes an insulating ring, the conductive ring includes a first conductive ring and a second conductive ring, and the insulating ring is arranged between the first conductive ring and the second conductive ring to isolate the first conductive ring from the second conductive ring; the wire includes a first wire and a second wire, the first wire is electrically connected to the first conductive ring, and the second wire is electrically connected to the second conductive ring, and when the light-emitting component rotates relative to the conductive ring with the connecting sleeve, the first wire is always connected to the first conductive ring, and the second wire is always connected to the second conductive ring.

[0012] Optionally, the bending machine connection structure also includes a conductive spring sheet, which is fixedly connected to the first mounting protrusion; one end of the conductive spring sheet is connected to the wire, and the other end of the conductive spring sheet is pressed against the conductive ring.

[0013] Optionally, the first mounting protrusion is provided with a positioning groove connected to the second opening and a boss arranged in the positioning groove, the conductive spring sheet includes a connecting arm and an elastic arm connected to each other, the wire and the connecting arm are both connected to the boss to position the conductive spring sheet, and the wire is in conductive contact with the connecting arm; the elastic arm is in close contact with the conductive ring.

[0014] Optionally, a slot extending along the axial direction of the second mounting protrusion is formed on the second mounting protrusion, and the bending machine connection structure also includes a circuit board connecting wire; one end of the circuit board connecting wire is located in the slot and is electrically connected to the conductive ring, and the other end of the circuit board connecting wire is used to extend out of the insulating sleeve to connect to the circuit board.

[0015] Optionally, a pin hole is provided on the connecting sleeve, and the bending machine connection structure also includes a pin installed in the pin hole, and the pin is used to connect with the bending machine head.

[0016] The embodiment of the present invention further provides a dental contra-angle handpiece, which comprises a contra-angle handpiece head, a contra-angle handpiece handle and a contra-angle handpiece connecting structure; the contra-angle handpiece head is connected to a connecting sleeve of the contra-angle handpiece connecting structure, and the contra-angle handpiece handle is connected to an insulating sleeve of the contra-angle handpiece connecting structure.

[0017] Optionally, the bending handpiece includes an optical fiber, a bending handpiece housing and an input gear box, the input gear box is connected to the connecting sleeve, and the bending handpiece housing is fixedly connected to the side of the input gearbox away from the connecting sleeve; a first optical fiber hole is provided on the input gearbox, and a second optical fiber hole is provided on the bending handpiece housing, the first optical fiber hole and the second optical fiber hole are connected to form an installation channel for the optical fiber, and the end of the second optical fiber hole away from the first optical fiber hole has a third opening that penetrates the bending handpiece housing, and the third opening is used to allow the light transmitted by the optical fiber to be emitted for lighting.

[0018] The beneficial effects of the contra-angle handpiece connection structure and the dental contra-angle handpiece according to the embodiments of the present invention include, for example:

[0019] The contraflex machine connection structure provided by the embodiment of the present invention comprises a connecting sleeve, an insulating sleeve, a handle ring, a conductive ring and a light-emitting component. The connecting sleeve is used to connect with the contraflex machine head, and the insulating sleeve is used to connect with the contraflex machine handle. The two ends of the handle ring are respectively provided with limiting parts of the connecting part, the insulating sleeve is connected to the connecting part, the connecting sleeve is located on the inner side of the handle ring, and the two ends of the connecting sleeve are respectively abutted with the limiting part and the insulating sleeve to limit the connecting sleeve between the insulating sleeve and the limiting part. Since the connecting sleeve is positioned by abutting with the limiting part and the insulating sleeve at both ends of the axial direction, the connecting sleeve can rotate relative to the handle ring and the insulating sleeve, thereby realizing the rotation of the contraflex machine head relative to the contraflex machine handle when in use. The connecting sleeve is provided with an installation space and a first opening connected with the installation space. The light-emitting component is installed in the installation space, and the first opening is used to connect the optical fiber of the contraflex machine head with the installation space, so that the light emitted by the light-emitting component enters the optical fiber through the first opening and is transmitted in the optical fiber for lighting. The light-emitting component is electrically connected to the conductive ring to power the light-emitting component through the conductive ring. Furthermore, since the conductive ring is annular, when the light-emitting part rotates relative to the conductive ring with the connecting sleeve, the light-emitting part and the conductive ring are always connected, and then when the contra-angle handpiece head rotates 360°, the first opening always corresponds to the optical fiber to ensure the light transmission effect, and in this process, the conductive ring is always connected to the light-emitting part to provide electrical energy to the light-emitting part. The contra-angle handpiece connection structure has a built-in light source, which can enhance its lighting effect. At the same time, the contra-angle handpiece head can rotate 360° relative to the contra-angle handpiece handle. During the rotation process, the lighting function is not affected, and it is easy to use and has good effects.

[0020] The embodiment of the present invention further provides a dental contra-angle handpiece, which comprises the contra-angle handpiece connection structure described above. Since the dental contra-angle handpiece comprises the contra-angle handpiece connection structure described above, it also has all the beneficial effects of the contra-angle handpiece connection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the structure of a dental contra-angle handpiece provided by an embodiment of the present invention;

[0023] Figure 2 An exploded structural diagram of a bending machine connection structure provided by an embodiment of the present invention;

[0024] Figure 3 A schematic cross-sectional structure diagram of a bending machine connection structure at a first position provided by an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the structure of an angled handpiece in a dental angled handpiece provided by an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the structure of a handle fixing ring in a contra-angle bending machine connection structure provided by an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of the structure of an insulating sleeve in a bending machine connection structure provided by an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of the structure of a conductive spring in a bending machine connection structure provided by an embodiment of the present invention;

[0029] Figure 8 A schematic diagram of the cross-sectional structure of the bending machine connection structure at a second position provided by an embodiment of the present invention.

[0030] Icons: 10-dental contra-angle handpiece; 100-contra-angle handpiece connection structure; 110-connecting sleeve; 111-handle fixing ring; 1111-first buckling part; 1112-groove; 1113-second opening; 1114-positioning groove; 1115-convex column; 1116-first mounting protrusion; 112-fastener; 1121-first opening; 1122-pin hole; 113-installation space; 120-handle ring; 121-connecting part; 122-limiting part; 130-insulating sleeve; 131-external thread; 132-second mounting protrusion; 133-notch; 13 4-bolt hole; 141-first conductive ring; 142-second conductive ring; 143-insulating ring; 144-annular space; 151-light-emitting element; 153-second wire; 154-wire; 155-circuit board connecting wire; 160-conductive spring; 161-connecting arm; 162-elastic arm; 163-bend; 170-motor connecting part; 200-bend machine head; 210-bend machine head housing; 211-second optical fiber hole; 212-third opening; 220-input gear box; 221-first optical fiber hole; 230-optical fiber; 300-bend machine handle. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0036] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0037] Figure 1 This is a schematic diagram of the structure of the dental contra-angle handpiece 10 provided in this embodiment. Figure 2 The exploded structural diagram of the bending machine connection structure 100 provided in this embodiment is as follows: Figure 3 This is a schematic diagram of the cross-sectional structure of the bending machine connection structure 100 provided in this embodiment at the first position. Figure 1-Figure 3 This embodiment provides a contra-angle handpiece connection structure 100, and accordingly, provides a dental contra-angle handpiece 10.

[0038] The dental contra-angle handpiece 10 comprises a contra-angle handpiece connection structure 100, and the dental contra-angle handpiece 10 also comprises a contra-angle handpiece head 200 and a contra-angle handpiece handle 300. The contra-angle handpiece head 200 and the contra-angle handpiece handle 300 are respectively located on both sides of the contra-angle handpiece connection structure 100, and the connecting sleeve 110 of the contra-angle handpiece connection structure 100 is connected to the contra-angle handpiece head 200, and the insulating sleeve 130 of the contra-angle handpiece connection structure 100 is connected to the contra-angle handpiece handle 300.

[0039] The contra-angle handpiece connection structure 100 includes a connection sleeve 110, an insulating sleeve 130, a handle ring 120, a conductive ring and a light-emitting member 151. The connection sleeve 110 is used to connect with the contra-angle handpiece head 200, and the insulating sleeve 130 is used to connect with the contra-angle handpiece handle 300. The two ends of the handle ring 120 are respectively provided with the limiting parts 122 of the connection part 121, and the insulating sleeve 130 is connected to the connection part 121. The connection sleeve 110 is located inside the handle ring 120, and the two ends of the connection sleeve 110 are respectively abutted with the limiting parts 122 and the insulating sleeve 130 to limit the connection sleeve 110 between the insulating sleeve 130 and the limiting parts 122. Since the connection sleeve 110 is positioned by abutting the limiting parts 122 and the insulating sleeve 130 at the two axial ends, the connection sleeve 110 can rotate relative to the handle ring 120 and the insulating sleeve 130, thereby realizing the rotation of the contra-angle handpiece head 200 relative to the contra-angle handpiece handle 300 when in use. The connecting sleeve 110 is provided with an installation space 113 and a first opening 1121 communicating with the installation space 113. The light emitting member 151 is installed in the installation space 113, and the first opening 1121 is used to connect the optical fiber 230 of the contra-angle handpiece 200 with the installation space 113, so that the light emitted by the light emitting member 151 enters the optical fiber 230 through the first opening 1121 and is transmitted in the optical fiber 230 for illumination.

[0040] The light-emitting member 151 is electrically connected to the conductive ring so as to supply power to the light-emitting member 151 through the conductive ring. Moreover, since the conductive ring is annular, when the light-emitting member 151 rotates relative to the conductive ring along with the connecting sleeve 110, the light-emitting member 151 and the conductive ring are always connected, and then when the contraflex handpiece 200 rotates 360°, the first opening 1121 always corresponds to the optical fiber 230 to ensure the light transmission effect, and in this process, the conductive ring is always connected to the light-emitting member 151 to provide power to the light-emitting member 151. The contraflex handpiece connection structure 100 has a built-in light source, which can enhance its lighting effect. At the same time, the contraflex handpiece 200 can rotate 360° relative to the contraflex handpiece handle 300. During the rotation process, the lighting function is not affected, and it is easy to use and has a good effect.

[0041] The dental contra-angle handpiece 10 provided in this embodiment is further described below:

[0042] Figure 4 This is a schematic diagram of the structure of the contra-angle handpiece 200 in the dental contra-angle handpiece 10 provided in this embodiment. Figure 1 and Figure 4 In this embodiment, the contraflex handpiece 200 includes an optical fiber 230, a contraflex handpiece housing 210 and an input gearbox 220. The input gearbox 220 is connected to the connecting sleeve 110. The contraflex handpiece housing 210 is fixedly connected to the side of the input gearbox 220 away from the connecting sleeve 110, that is, the contraflex handpiece housing 210 is connected to the contraflex handpiece connecting structure 100 through the input gearbox 220. A first optical fiber hole 221 is provided on the input gearbox 220, and a second optical fiber hole 211 is provided on the contraflex handpiece housing 210. The first optical fiber hole 221 and the second optical fiber hole 211 are connected to form an installation channel for the optical fiber 230. That is, when the optical fiber 230 is installed in the installation channel, a part of the optical fiber 230 is located in the first optical fiber hole 221, and another part of the optical fiber 230 is located in the second optical fiber hole 211. In this way, the optical fiber 230 can be well protected and has a good waterproof effect.

[0043] The second optical fiber hole 211 has a third opening 212 that penetrates the contra-angle handpiece housing 210 at one end away from the first optical fiber hole 221, and the light transmitted by the optical fiber 230 is emitted through the third opening 212 for illumination. Specifically, the third opening 212 is arranged near the working end of the contra-angle handpiece 200, and the third opening 212 is located on the side wall of the contra-angle handpiece housing 210. The first optical fiber hole 221 is a through hole that penetrates the input gear box 220 at both ends, one end of which is connected to the second optical fiber hole 211, and the other end corresponds to the first opening 1121 of the contra-angle handpiece connection structure 100, so that one end of the optical fiber 230 can receive the light emitted by the light-emitting component 151 in the installation space 113. Optionally, the optical fiber 230 is inserted into the installation space 113 through the first opening 1121 to ensure stable transmission of light.

[0044] Figure 5 This is a schematic diagram of the structure of the handle fixing ring 111 in the bending machine connection structure 100 provided in this embodiment. Figure 1-Figure 5 In this embodiment, the connecting sleeve 110 includes a fastener 112 and a handle fixing ring 111. A groove 1112 is opened on one side of the handle fixing ring 111. The fastener 112 is buckled with the handle fixing ring 111 to form an installation space 113 with the groove 1112. The first opening 1121 is opened on the fastener 112. When the fastener 112 is buckled with the handle fixing ring 111, the first opening 1121 is connected to the installation space 113. The two ends of the handle fixing ring 111 are respectively in contact with the limiting portion 122 and the insulating sleeve 130.

[0045] Specifically, the handle fixing ring 111 and the fastener 112 are both annular parts. A first fastening portion 1111 is provided on the end surface of the handle fixing ring 111 close to the fastener 112, and the first fastening portion 1111 is an annular protruding structure provided along the outer edge of the end surface. A second fastening portion is provided on the outer edge of one end of the fastener 112, and the second fastening portion is fastened with the first fastening portion 1111 to connect the handle fixing ring 111 with the fastener 112, and at the same time, the fastener 112 contacts the end surface of the handle fixing ring 111 to enclose the installation space 113 with the groove 1112. The through hole formed on the fastener 112 is connected to the installation space 113 as a first opening 1121, and the cross-sectional area of ​​the first opening 1121 is smaller than the cross-sectional area of ​​the installation space 113, so that the light-emitting member 151 is limited in the installation space 113, and the end of the optical fiber 230 can extend into the installation space 113 through the first opening 1121, so as to ensure that when the optical fiber 230 rotates with the contra-angle handpiece 200, the handle fixing ring 111 rotates synchronously with the optical fiber 230, so that the optical fiber 230 maintains good transmission of the light emitted by the light-emitting member 151. Optionally, the light-emitting member 151 is an LED lamp.

[0046] The upper end surface of the first buckling portion 1111 is located radially outside the fastener 112, so the upper end surface of the first buckling portion 1111 and the outer peripheral surface of the fastener 112 form a step portion, which abuts against the limiting portion 122 to limit the axial position of the handle fixing ring 111.

[0047] In this embodiment, a pin hole 1122 is provided on the connecting sleeve 110, and the contraflex handpiece connection structure 100 further includes a pin (not shown) installed in the pin hole 1122, and the pin is used to connect with the contraflex handpiece 200, so that the contraflex handpiece 200 is connected to the connecting sleeve 110 through the pin. Specifically, the pin hole 1122 is provided on the fastener 112, and a corresponding hole is provided on the input gear box 220 of the contraflex handpiece 200, so that the fastener 112 and the input gear box 220 are fixedly connected and positioned through the pin.

[0048] In this embodiment, the connecting sleeve 110 is provided with a first mounting protrusion 1116, and the first mounting protrusion 1116 abuts against the insulating sleeve 130. The insulating sleeve 130 is formed with a second mounting protrusion 132, and the second mounting protrusion 132 is spaced apart from the first mounting protrusion 1116 to form an annular space 144 for accommodating the conductive ring between the first mounting protrusion 1116 and the second mounting protrusion 132. The connecting sleeve 110 is provided with a second opening 1113 that connects the annular space 144 and the mounting space 113, and the wire 154 of the light-emitting member 151 passes through the second opening 1113 to be electrically connected to the conductive ring.

[0049] Figure 6 This is a schematic diagram of the structure of the insulating sleeve 130 in the bending machine connection structure 100 provided in this embodiment. Figure 1-Figure 6 Specifically, a first mounting protrusion 1116 is provided on the outer edge of the end face of the handle fixing ring 111 away from the fastener 112. The first mounting protrusion 1116 is an annular protrusion formed by the outer edge portion of the end face of the handle fixing ring 111 protruding outward along the axial direction. The outer peripheral surface of the first mounting protrusion 1116 and the outer peripheral surface of the first buckling portion 1111 are coplanar. The insulating sleeve 130 is an annular member, and the insulating sleeve 130, the handle ring 120 and the connecting sleeve 110 are all coaxially arranged. An external thread 131 is provided on the radially outer peripheral wall of the insulating sleeve 130, and the connecting portion 121 of the handle ring 120 is an internal thread provided on the inner peripheral surface of the handle ring 120, and the internal thread is screwed to the external thread 131 to fix the insulating sleeve 130 to the handle ring 120. The end surface of the insulating sleeve 130 close to the handle fixing ring 111 abuts against the end surface of the first mounting protrusion 1116 away from the fastener 112, so that the handle fixing ring 111 is limited by the combined action of the insulating sleeve 130 and the limiting portion 122.

[0050] Since the handle fixing ring 111, the insulating sleeve 130 and the limiting portion 122 are all annular, and the insulating sleeve 130 and the limiting portion 122 only limit the axial position of the handle fixing ring 111, the handle fixing ring 111 can move in the circumferential direction relative to the insulating sleeve 130 and the limiting portion 122. In other words, the handle fixing ring 111 and the fastener 112 buckled thereon can rotate 360° around the axis relative to the insulating sleeve 130 and the handle ring 120, thereby realizing a 360° rotation of the contralateral handpiece head 200 relative to the contralateral handpiece handle 300.

[0051] The inner edge of the end surface of the insulating sleeve 130 near the handle fixing ring 111 protrudes outward along the axial direction to form an annular second mounting protrusion 132. The second mounting protrusion 132 and the first mounting protrusion 1116 are arranged radially spaced apart, so that an annular space 144 is formed between the first mounting protrusion 1116 and the second mounting protrusion 132. The conductive ring is installed in the annular space 144 and is coaxially arranged with the annular space 144. In other words, the conductive ring is sleeved on the second mounting protrusion 132.

[0052] In this embodiment, the contraflex machine connection structure 100 further includes an insulating ring 143, and the number of the conductive rings is two, and the two conductive rings are respectively a first conductive ring 141 and a second conductive ring 142. The insulating ring 143 is arranged between the first conductive ring 141 and the second conductive ring 142, thereby preventing the first conductive ring 141 from being electrically connected to the second conductive ring 142. The light-emitting member 151 is provided with a first wire and a second wire 153, the first wire is electrically connected to the first conductive ring 141, and the second wire 153 is electrically connected to the second conductive ring 142. When the light-emitting member 151 rotates with the connecting sleeve 110, the first wire is always electrically connected to the first conductive ring 141, and the second wire 153 is always electrically connected to the second conductive ring 142, thereby ensuring the light-emitting stability of the light-emitting member 151 during the rotation of the contraflex machine head 200. Specifically, the first conductive ring 141 , the second conductive ring 142 and the insulating ring 143 are coaxially arranged, and the first conductive ring 141 , the insulating ring 143 and the second conductive ring 142 are sequentially arranged along the axial direction of the annular space 144 .

[0053] Figure 7 This is a schematic diagram of the structure of the conductive spring 160 in the bending machine connection structure 100 provided in this embodiment. Figure 1-Figure 7 In this embodiment, the bending machine connection structure 100 also includes a conductive spring 160, which is fixedly connected to the first mounting protrusion 1116 so as to rotate synchronously with the handle fixing ring 111 when the handle fixing ring 111 rotates. One end of the conductive spring 160 is connected to the wire 154, and the other end is pressed against the conductive ring to achieve electrical connection between the wire 154 and the conductive ring. Specifically, the wire 154 includes a first wire and a second wire 153. Accordingly, the number of the conductive springs 160 is two, and the first wire is energized with the first conductive ring 141 through one of the conductive springs 160, and the second wire 153 is energized with the second conductive ring 142 through the other conductive spring 160.

[0054] Further, the conductive spring piece 160 includes a connecting arm 161 and an elastic arm 162 connected to each other, the wire 154 is connected to the connecting arm 161, and the elastic arm 162 is in close contact with the conductive ring, thereby realizing the electrical connection between the wire 154 and the conductive ring. Since the elastic arm 162 is elastic, it can ensure good contact with the conductive ring under the action of elastic force during the rotation process, thereby ensuring the conductive effect. Specifically, the connecting arm 161 and the elastic arm 162 are connected to each other to form a V-shaped conductive spring piece 160. Optionally, the connecting arm 161 and the elastic arm 162 are formed as a whole by bending. Further, the conductive spring piece 160 also includes two bends 163 arranged on the connecting arm 161, and the two bends 163 are relatively arranged on both sides of the connecting arm 161 to enclose the wire 154, thereby realizing the positioning of the wire 154.

[0055] Furthermore, the first mounting protrusion 1116 is also provided with a positioning groove 1114 communicating with the second opening 1113 and a boss 1115 disposed in the positioning groove 1114. The wire 154 and the connecting arm 161 of the conductive spring 160 are both connected to the boss 1115 to position the conductive spring 160. Specifically, a clamping hole is provided on the connecting arm 161, and the boss 1115 is passed through the clamping hole to be connected with the connecting arm 161.

[0056] Figure 8 This is a schematic diagram of the cross-sectional structure of the bending machine connection structure 100 provided in this embodiment at the second position. Figure 1-Figure 8 In this embodiment, a notch 133 extending along the axial direction of the second mounting protrusion 132 is formed on the second mounting protrusion 132. The bending machine connection structure 100 further includes a circuit board connection wire 155, one end of which is located in the notch 133 and is electrically connected to the conductive ring; the other end of the circuit board connection wire 155 is used to extend out of the insulating sleeve 130 to be connected to a circuit board (not shown).

[0057] Specifically, the bending machine connection structure 100 also includes a motor connector 170. One end of the motor connector 170 is inserted into the insulating sleeve 130, and the other end is used to connect to the motor (not shown). Specifically, the bending machine handle 300 includes a handle housing and a motor and a circuit board arranged in the handle housing. The insulating sleeve 130 is provided with a bolt hole 134, and one end of the handle housing is fixedly connected to the insulating sleeve 130 by a bolt, and one end of the motor connector 170 located in the handle housing is connected to the motor. A notch is provided on the motor connector 170 that is connected to the notch 133, and the other end of the circuit board connecting line 155 is arranged in the notch, and extends out of the insulating sleeve 130 along the notch and then extends into the handle housing, and is connected to the circuit board in the handle housing.

[0058] According to a dental contra-angle handpiece 10 provided in this embodiment, the working principle of the dental contra-angle handpiece 10 is as follows:

[0059] The circuit board, the circuit board connecting wire 155, the first conductive ring 141, the second conductive ring 142, the first wire, the second guide and the light emitting member 151 form a conductive loop. When the circuit board supplies power to the light emitting member 151, the light emitting member 151 emits light, and the light emitted by the light emitting member 151 is transmitted through the optical fiber 230 and emitted from the third opening 212, thereby providing illumination for easy observation during operation. At the same time, during use, the operation position is changed by rotating the contraflex handpiece 200. When the contraflex handpiece 200 rotates relative to the contraflex handpiece handle 300, the contraflex handpiece 200 drives the fastener 112 and the handle fixing ring 111 to rotate synchronously, so that one end of the optical fiber 230 always passes through the first opening 1121 to be located in the installation space 113, thereby transmitting the light emitted by the light emitting member 151 through the optical fiber 230. Furthermore, when the handle fixing ring 111 rotates, the first wire, the second wire 153 and the two conductive springs 160 rotate synchronously, and the spring arms of the conductive springs 160 are pressed against the conductive rings to ensure the conductive stability of the first wire and the first conductive ring 141, and the conductive stability of the second wire 153 and the second conductive ring 142. In this way, the lighting effect will not be affected during the rotation of the contra-angle handpiece 200.

[0060] The bending machine connection structure 100 provided in this embodiment has at least the following advantages:

[0061] The contra-angle handpiece connection structure 100 provided in this embodiment has a built-in light-emitting component 151 for lighting during operation. At the same time, since the light-emitting component 151 is built-in, its lighting effect can be enhanced to prevent the inconvenience of observation caused by the external light source. The light emitted by the built-in light-emitting component 151 is transmitted through the optical fiber 230 on the contra-angle handpiece head 200. The optical fiber 230 is arranged inside the contra-angle handpiece head 200. The optical fiber 230 can be well protected during cleaning and has a good waterproof effect. The connecting sleeve 110 is limited between the limiting portion 122 and the insulating sleeve 130 by the abutment on both sides of the axial direction, and the connecting sleeve 110 can rotate 360° relative to the insulating sleeve 130, so that the contraflex handpiece 200 connected to the connecting sleeve 110 can rotate 360° relative to the contraflex handpiece handle 300 connected to the insulating sleeve 130. At the same time, the contraflex handpiece connection structure 100 is provided with a conductive ring, and the conductive ring is electrically connected to the wire 154 of the light-emitting member 151 through the conductive spring 160, which ensures the conductive stability when the light-emitting member 151 rotates with the connecting sleeve 110, thereby ensuring that the lighting effect is not affected by the rotation. At the same time, the contraflex handpiece connection structure 100 has a simple structure and is easy to assemble.

[0062] This embodiment also provides a dental contra-angle handpiece 10 , which includes the contra-angle handpiece connection structure 100 described above, and thus also has all the beneficial effects of the contra-angle handpiece connection structure 100 .

[0063] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A contra-angle hand connection structure, used to connect the contra-angle hand head and the contra-angle hand handle, It is characterized in that The contra-angle machine connection structure comprises a connecting sleeve, an insulating sleeve, a handle ring, a conductive ring and a light-emitting member, wherein the connecting sleeve is used to connect with the contra-angle machine head, and the insulating sleeve is used to connect with the contra-angle machine handle; a connecting portion and a limiting portion are respectively provided at both ends of the handle ring, the insulating sleeve is connected to the connecting portion, the connecting sleeve is located on the inner side of the handle ring, and the two ends of the connecting sleeve are respectively in contact with the limiting portion and the insulating sleeve, so as to limit the connecting sleeve between the insulating sleeve and the limiting portion; The connecting sleeve is provided with an installation space and a first opening connected with the installation space, the light emitting element is installed in the installation space, and the first opening is used to connect the optical fiber of the contra-angle handpiece with the installation space; the light emitting element is electrically connected with the conductive ring, and when the light emitting element rotates with the connecting sleeve relative to the conductive ring, the light emitting element and the conductive ring are always connected; The connecting sleeve is provided with a first mounting protrusion, and the first mounting protrusion abuts against the insulating sleeve; the insulating sleeve is provided with a second mounting protrusion, and the second mounting protrusion is spaced apart from the first mounting protrusion to form an annular space for accommodating the conductive ring; the connecting sleeve is provided with a second opening connecting the annular space and the mounting space, and the wire of the light-emitting element passes through the second opening to be electrically connected with the conductive ring; The connecting sleeve comprises a fastener and a handle fixing ring, one end of the handle fixing ring is provided with a groove, the fastener is buckled with the handle fixing ring to form the installation space with the groove; the first opening is provided in the fastener; the two ends of the handle fixing ring are respectively in contact with the limiting portion and the insulating sleeve; The bending machine connection structure also includes an insulating ring, the conductive ring includes a first conductive ring and a second conductive ring, and the insulating ring is arranged between the first conductive ring and the second conductive ring to isolate the first conductive ring from the second conductive ring; the wire includes a first wire and a second wire, the first wire is electrically connected to the first conductive ring, the second wire is electrically connected to the second conductive ring, and when the light-emitting member rotates relative to the conductive ring with the connecting sleeve, the first wire is always connected to the first conductive ring, and the second wire is always connected to the second conductive ring; The bending machine connection structure also includes a conductive spring sheet, which is fixedly connected to the first mounting protrusion; one end of the conductive spring sheet is connected to the wire, and the other end of the conductive spring sheet is pressed against the conductive ring.

2. The bending machine connection structure according to claim 1, It is characterized in that The first mounting protrusion is provided with a positioning groove communicating with the second opening and a convex column arranged in the positioning groove, the conductive spring sheet includes a connecting arm and an elastic arm connected to each other, the wire and the connecting arm are both connected to the convex column to position the conductive spring sheet, and the wire is in conductive contact with the connecting arm; The elastic arm is in close contact with the conductive ring.

3. The bending machine connection structure according to claim 1, It is characterized in that The second mounting protrusion is provided with a slot extending along the axial direction of the second mounting protrusion, and the bending machine connection structure also includes a circuit board connecting wire; one end of the circuit board connecting wire is located in the slot and is electrically connected to the conductive ring, and the other end of the circuit board connecting wire is used to extend out of the insulating sleeve to be connected to the circuit board.

4. The bending machine connection structure according to any one of claims 1 to 3, It is characterized in that The connecting sleeve is provided with a pin hole, and the contra-angle machine connection structure further comprises a pin installed in the pin hole, and the pin is used to be connected with the contra-angle machine head.

5. A dental contra-angle handpiece, It is characterized in that The dental contra-angle handpiece comprises a contra-angle handpiece head, a contra-angle handpiece handle and a contra-angle handpiece connecting structure according to any one of claims 1 to 4; the contra-angle handpiece head is connected to a connecting sleeve of the contra-angle handpiece connecting structure, and the contra-angle handpiece handle is connected to an insulating sleeve of the contra-angle handpiece connecting structure.

6. The dental contra-angle handpiece according to claim 5, It is characterized in that The bending handpiece includes an optical fiber, a bending handpiece housing and an input gear box, wherein the input gear box is connected to the connecting sleeve, and the bending handpiece housing is fixedly connected to a side of the input gearbox away from the connecting sleeve; a first optical fiber hole is provided on the input gearbox, and a second optical fiber hole is provided on the bending handpiece housing, the first optical fiber hole and the second optical fiber hole are connected to form an installation channel for the optical fiber, and an end of the second optical fiber hole away from the first optical fiber hole has a third opening penetrating the bending handpiece housing, and the third opening is used to emit light transmitted by the optical fiber for lighting.

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