Dental medical strong and weak suction handle switch knob

Abstract

A dental medical strong and weak suction handle switch knob comprises a hard valve element, and a valve hole penetrating through the hard valve element in the radial direction is formed in the hard valve element. An annular soft sleeve synchronously rotating along with the hard valve element is arranged on the peripheral face of the hard valve element, a sealing structure is arranged on the outer ring wall face of the annular soft sleeve, the sealing structure comprises two annular protruding parts located on the two sides of the receding hole respectively, and the annular protruding parts and the annular soft sleeve are of an integrally-formed structure. According to the structure, through soft and hard combination of the hard valve element and the annular soft sleeve, the hard valve element can serve as a support to drive the annular soft sleeve to rotate synchronously, the annular soft sleeve fills and seals a machining gap between the hard valve element and the strong suction head, and the sealing effect is guaranteed; and the annular convex part and the annular soft sleeve are integrally formed, so that the problem that a traditional sealing structure is easily scratched is solved, and the service life and the sealing effect of the sealing structure are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of dental treatment instruments, in particular to a dental medical strong and weak suction handle switch knob. Background Art

[0002] The dental strong and weak suction handle is usually installed on a dental chair and connected to a negative pressure pump. During oral clinical treatment operations, it is used to suck out liquids from the patient's mouth, assist in isolating the treatment area, and pull the patient's oral soft tissue.

[0003] The dental treatment suction device disclosed in the Chinese patent of reference CN202220981630.1 includes a suction body, the suction body includes a suction head section and a handle section connected in sequence, the two ports of the suction body are a connecting port and a suction port, a suction channel connecting the connecting port and the suction port is arranged in the suction body, a valve core block is rotatably arranged in the handle section, the valve core block is connected to an operating member, the valve core block is provided with a through valve hole, the doctor drives the valve core block to rotate through the operating member, so that the valve core block can be rotated to an angle position where the valve hole penetrates the suction channel, or the valve core block can be rotated to an angle position where the suction channel is blocked, so that the operation is more convenient, the side wall of the handle section is provided with two rotating ports that are perpendicular to the suction channel, the two rotating ports are arranged opposite to each other, the valve core block is rotatably sleeved on the two rotating ports, and a sealing ring is arranged between the valve core block and the rotating port to improve the sealing between the valve core block and the rotating port.

[0004] In the above patent, the inner ring of the sealing ring is installed on the groove on the valve core block, and the sealing ring is positioned by the groove on the valve core block, so that the sealing ring is not easily displaced, and the outer ring of the sealing ring protrudes outside the groove to contact the rotating port to achieve sealing. In the prior art, since the strong and weak suction handles need to be cleaned at the end of use, and the joint between the valve core and the strong suction head is the position where the strong and weak suction handles are most likely to retain the patient's oral fluid, it is particularly important to disassemble and clean the valve core block position.

[0005] However, since the inner ring of the sealing ring is embedded in the groove on the valve core block and the outer ring abuts against the wall of the rotating port, when medical staff pull out the valve core block along the axial direction of the rotating port, the position between the inner ring and the outer ring of the sealing ring will be pulled and squeezed on the edge between the outer peripheral surface of the valve core block and the wall of the groove, which can easily cause the surface of the sealing ring to be scratched, thereby affecting the service life and sealing effect of the sealing ring. Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a dental medical strong and weak suction handle switch knob.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A dental medical strong and weak suction handle switch knob, comprising a hard valve core, the hard valve core is provided with a valve hole radially penetrating the hard valve core; the characteristic is that: an annular soft sleeve is provided on the outer peripheral surface of the hard valve core and rotates synchronously with the hard valve core, and the annular soft sleeve is provided with two avoidance holes respectively used to avoid the two ends of the valve hole;

[0009] At least one sealing structure for sealing with the strong suction head is provided on the outer ring wall surface of the annular soft sleeve, and the sealing structure includes two annular convex parts respectively located on both sides of the avoidance hole, and the annular convex part is arranged around the outer ring wall surface of the annular soft sleeve, and the annular convex part and the annular soft sleeve are an integrally formed structure.

[0010] In the utility model, the annular soft sleeve is made of silicone material.

[0011] In the utility model, the hard valve core is made of hard plastic by injection molding.

[0012] In the utility model, the hard valve core comprises a circular tube portion, two circular shaft portions and two circular shaft blocks, wherein the two circular shaft portions are integrally formed and connected to two radially opposite ends of the circular tube portion;

[0013] The inner sides of the two circular shaft blocks are respectively connected to one end of the two circular shaft parts away from the circular tube part. The axial direction of the circular shaft part and the axial direction of the circular shaft block are located on the same axis. The outer circumferential surface of the circular tube part, the outer circumferential surfaces of the two circular shaft parts and the inner sides of the two circular shaft blocks are surrounded to form a synchronous matching groove. The inner ring of the annular soft sleeve is adapted to the synchronous matching groove, and the inner cavity of the circular tube part is the valve hole.

[0014] In the utility model, the two axial ends of the circular tube portion extend into two avoidance holes respectively, and the outer peripheral surface of the circular tube portion is connected to the hole wall of the avoidance hole.

[0015] In the utility model, an avoidance recess located between the circular tube portion and the circular shaft block is provided on the outer circumferential surface of the circular shaft portion, a rubber sleeve positioning groove is formed between each of the avoidance recesses and the middle part of the outer circumferential surface of the circular tube portion, a sealing positioning portion is provided on the inner ring wall surface of the annular soft sleeve, and one of the sealing positioning portions is adapted in each of the rubber sleeve positioning grooves.

[0016] In the utility model, the sealing positioning portion and the annular soft sleeve are integrally formed.

[0017] In the utility model, a handle is provided on the hard valve core for linking the hard valve core to rotate.

[0018] In the utility model, the two axial end faces of the hard valve core are provided with a retaining groove, the lever is U-shaped, the two swing arms of the lever correspond to the two axial end faces of the hard valve core respectively, and the swing arm is provided with a retaining protrusion adapted to the retaining groove.

[0019] The utility model further comprises a strong suction head, wherein a mounting circular hole is provided on the outer side of the strong suction head, and the hard valve core is rotatably fitted in the mounting circular hole; a first channel and a second channel are respectively provided at both ends of the strong suction head, and a liquid outlet end of the first channel and a liquid inlet end of the second channel both penetrate the hole wall of the mounting circular hole, and the liquid outlet end of the first channel and the liquid inlet end of the second channel can be connected through the valve hole.

[0020] The beneficial effects of the utility model are as follows: the utility model first provides an annular soft sleeve on the outer peripheral surface of the hard valve core, which rotates synchronously with the hard valve core, and then provides an annular convex portion on the annular soft sleeve. The above structure combines the hard and soft parts of the hard valve core and the annular soft sleeve, so that the hard valve core can be used as a bracket to drive the annular soft sleeve to rotate synchronously, and the annular soft sleeve can fill and close the processing gap between the hard valve core and the strong suction head to ensure the sealing effect; and the annular convex portion and the annular soft sleeve are integrally formed, so that the problem of the traditional sealing structure being easily scratched is avoided, and the service life and sealing effect of the sealing structure are guaranteed; at the same time, the annular convex portion does not require additional assembly steps, which effectively improves the assembly efficiency of the strong and weak suction handles. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 is an exploded view of this embodiment;

[0023] Figure 2 is a three-dimensional diagram of this embodiment;

[0024] Figure 3 Schematic diagram of the internal structure of this embodiment;

[0025] Figure 4 It is an exploded view between the valve core and the annular soft sleeve;

[0026] Figure 5 It is a combined cross-sectional view of the valve core and the annular soft sleeve. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the utility model, the descriptions of "first" or "second" etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0030] Reference Figure 1-5 A dental medical strong and weak suction handle switch knob comprises a hard valve core 1, the hard valve core 1 is provided with a valve hole 11 which radially penetrates the hard valve core 1, an annular soft sleeve 3 which rotates synchronously with the hard valve core 1 is provided on the outer peripheral surface of the hard valve core 1, the annular soft sleeve 3 is made of silicone material, and the annular soft sleeve 3 is provided with two avoidance holes 31 which are respectively used to avoid the two ends of the valve hole 11; at least one sealing structure for cooperating with the strong suction head 2 for sealing is provided on the outer ring wall surface of the annular soft sleeve 3, and the sealing structure comprises two annular convex portions 32 which are respectively located on both sides of the avoidance hole 31, the annular convex portion 32 is arranged around the outer ring wall surface of the annular soft sleeve 3, and the annular convex portion 32 and the annular soft sleeve 3 are an integrally formed structure.

[0031] The utility model firstly provides an annular soft sleeve 3 which rotates synchronously with the hard valve core 1 on the outer peripheral surface of the hard valve core 1, and then provides an annular convex portion 32 on the annular soft sleeve 3. The above structure, through the soft-hard combination of the hard valve core 1 and the annular soft sleeve 3, enables the hard valve core 1 to be used as a bracket to drive the annular soft sleeve 3 to rotate synchronously, so that the annular soft sleeve 3 fills and closes the processing gap between the hard valve core 1 and the strong suction head 2 to ensure the sealing effect; and the annular convex portion 32 is integrally formed with the annular soft sleeve 3, so that the problem that the traditional sealing structure is easily scratched is avoided, and the service life and sealing effect of the sealing structure are ensured; at the same time, the annular convex portion 32 does not require an additional assembly process, which effectively improves the assembly efficiency of the strong and weak suction handles.

[0032] When in use, the annular protrusion 32 may be in direct sliding contact with the hole wall of the mounting circular hole 21 to achieve a primary seal. Alternatively, an annular adapting groove for the annular protrusion 32 to adapt is provided on the hole wall of the mounting circular hole 21, and each annular protrusion 32 fits in one of the annular adapting grooves and contacts the groove surface of the annular adapting groove, thereby achieving a primary seal. In addition, the outer ring wall surface of the annular soft sleeve 3 may also be in sliding contact with the hole wall of the mounting circular hole 21 to achieve a secondary seal.

[0033] As a preferred embodiment, the hard valve core 1 is formed by hard plastic injection molding, and the hard valve core 1 includes a circular tube portion 12, two circular shaft portions 13 and two circular shaft blocks 14, wherein the two circular shaft portions 13 are respectively integrally connected to the two radially opposite ends of the circular tube portion 12 and form a cross structure with the circular tube portion 12, and the inner sides of the two circular shaft blocks 14 are respectively connected to the ends of the two circular shaft portions 13 away from the circular tube portion 12, and the axial direction of the circular shaft portion 13 and the axial direction of the circular shaft block 14 are both located on the same axis, the outer circumferential surface of the circular tube portion 12, the outer circumferential surfaces of the two circular shaft portions 13 and the inner sides of the two circular shaft blocks 14 are surrounded to form a synchronous matching groove, and the inner ring of the annular soft sleeve 3 is adapted to the synchronous matching groove so that the annular soft sleeve 3 and the hard valve core 1 rotate synchronously; the inner cavity of the circular tube portion 12 is the valve hole 11.

[0034] Furthermore, the two axial ends of the circular tube portion 12 extend into two avoidance holes 31 respectively, and the outer circumferential surface of the circular tube portion 12 is connected to the hole wall of the avoidance hole 31, so that the annular soft sleeve 3 cannot rotate circumferentially and move axially relative to the hard valve core 1 through the constraint of the circular tube portion 12, ensuring that the avoidance hole 31 can always be in a position corresponding to the valve hole 11 and avoiding the valve hole 11; the axial end surface of the circular tube portion 12 and the outer circumferential surface of the circular shaft block 14 do not protrude from the outer ring wall of the annular soft sleeve 3, thereby preventing the axial end surface of the circular tube portion 12 and the outer circumferential surface of the circular shaft block 14 from scratching the hole wall of the mounting circular hole 21.

[0035] As a preferred embodiment, the outer circumferential surface of the circular shaft portion 13 is provided with an avoidance recess located between the circular tube portion 12 and the circular shaft block 14, and a rubber sleeve positioning groove 15 is formed between each of the avoidance recesses and the middle part of the outer circumferential surface of the circular tube portion 12, and the inner ring wall surface of the annular soft sleeve 3 is provided with a sealing positioning portion 33 adapted to the rubber sleeve positioning groove 15, and each of the rubber sleeve positioning grooves 15 is adapted to one of the sealing positioning portions 33, and under the mutual cooperation of the sealing positioning portion 33 and the rubber sleeve positioning groove 15, the annular soft sleeve 3 is further prevented from circumferentially rotating and axially moving relative to the hard valve core 1, thereby ensuring that the avoidance hole 31 can always be in a position corresponding to the valve hole 11 and avoiding the valve hole 11; in addition, the sealing positioning portion 33 and the annular soft sleeve 3 are integrally formed, and the structure is stable.

[0036] Furthermore, each of the circular shaft portions 13 has two avoidance recesses which are respectively arranged at opposite ends of the circular shaft portion 13 in the radial direction, so that a plurality of rubber sleeve positioning grooves 15 can be formed on the hard valve core 1, further improving the positioning quality of the annular soft sleeve 3.

[0037] In the present embodiment, the dental medical strong and weak suction handle switch knob also includes a strong suction head 2; the strong suction head 2 is made of aluminum alloy, and a mounting circular hole 21 is provided on the outer side of the strong suction head 2, and the mounting circular hole 21 is arranged to penetrate the strong suction head 2 radially along the strong suction head 2, and the hard valve core 1 can be rotatably fitted in the mounting circular hole 21; a first channel 22 and a second channel 23 are respectively provided at both ends of the strong suction head 2, and the liquid outlet end of the first channel 22 and the liquid inlet end of the second channel 23 both penetrate the hole wall of the mounting circular hole 21, and the liquid outlet end of the first channel 22 and the liquid inlet end of the second channel 23 can be connected through the valve hole 11.

[0038] As a preferred embodiment, the hard valve core 1 is provided with a dial handle 4 for linking the hard valve core 1 to rotate. By turning the dial handle 4, medical staff can cause the hard valve core 1 to rotate, so that the through hole is connected to the first channel 22 and the second channel 23 correspondingly, so that the strong and weak suction handles can suck the liquid in the patient's mouth. Furthermore, the two axial end faces of the hard valve core 1 are provided with a clamping groove 16, and the dial handle 4 is U-shaped. The dial handle 4 includes a main body 41 and two swing arm parts 42 respectively connected to the two ends of the main body 41. The two swing arm parts 42 correspond to the two axial end faces of the hard valve core 1 respectively. The swing arm part 42 is provided with a clamping protrusion 43 adapted in the clamping groove 16, so that the dial hand 4 can be clamped and installed on the hard valve core 1.

[0039] As a preferred embodiment, a nozzle insertion groove 24 for connecting a nozzle is provided in the liquid inlet end of the first channel 22. A first sealing ring 5 for sealing with the nozzle is installed on the groove wall of the nozzle insertion groove 24. A first annular groove is provided on the groove wall of the nozzle insertion groove 24, and the cross-sectional shape of the first annular groove is square. The outer ring of the first sealing ring 5 is embedded in the first annular groove, so that the first sealing ring 5 is not easy to slip off from the first annular groove, thereby ensuring the stability during sealing.

[0040] As a preferred embodiment, a strong suction joint 6 is provided at one end of the strong suction head 2 away from the first channel 22, and a suction head channel 61 connected to the second channel 23 is provided in the strong suction joint 6, and the strong suction joint 6 is used to connect the suction tube of the negative pressure pump. Furthermore, a suction head plug-in groove 62 is provided in the liquid inlet end of the suction head channel 61, and a mating plug-in end 26 is provided on the end of the strong suction head 2 facing the strong suction joint 6, and the liquid outlet end of the second channel 23 extends through the end surface of the mating plug-in end 26, and the mating plug-in end 26 is matingly inserted in the suction head plug-in groove 62. This structure enables the strong suction head 2 and the strong suction joint 6 to be inserted and matched together. In addition, a clamping joint 63 for clamping the suction tube is provided on the end of the strong suction joint 6 that is away from the mating plug-in end 26, and the suction head channel 61 is arranged through the clamping joint 63.

[0041] As a preferred embodiment, a second sealing ring 7 is provided between the groove wall of the suction tip insertion groove 62 and the outer peripheral surface of the mating plug-in end 26 to reduce the probability of liquid and gas leakage from between the groove wall of the suction tip insertion groove 62 and the outer peripheral surface of the mating plug-in end 26.

[0042] Furthermore, a second annular groove is provided on the groove wall of the suction head insertion groove 62, and the cross-sectional shape of the second annular groove is square. The outer ring of the second sealing ring 7 is embedded in the second annular groove, so that the second sealing ring 7 is not easy to slip out of the second annular groove.

[0043] Furthermore, a second annular positioning groove for cooperating with the inner ring of the second sealing ring 7 is provided on the outer circumferential surface of the mating plug-in end 26, and the second annular positioning groove is arranged around the outer circumferential surface of the mating plug-in end 26. When the mating plug-in end 26 is inserted into the suction head plug-in groove 62, the inner ring of the second sealing ring 7 is embedded in the second annular positioning groove and fits with the groove wall of the second annular positioning groove to achieve sealing. Moreover, under this structure, the second sealing ring 7 can provide a certain force to restrain the mating plug-in end 26, so that the mating plug-in end 26 is not easy to slip out of the suction head plug-in groove 62, thereby ensuring the mating stability between the strong suction head 2 and the strong suction joint 6.

[0044] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the protection scope of the present invention.

Claims

1. A dental medical suction handle switch knob, comprising a hard valve core (1), wherein the hard valve core (1) is provided with a valve hole (11) radially penetrating the hard valve core (1); the characteristics are: An annular soft sleeve (3) is provided on the outer circumferential surface of the hard valve core (1) and rotates synchronously with the hard valve core (1). The annular soft sleeve (3) is provided with two avoidance holes (31) for avoiding the two ends of the valve hole (11). At least one sealing structure for cooperating with the strong suction head (2) for sealing is provided on the outer ring wall surface of the annular soft sleeve (3), and the sealing structure comprises two annular protrusions (32) respectively located on both sides of the avoidance hole (31), and the annular protrusions (32) are arranged around the outer ring wall surface of the annular soft sleeve (3), and the annular protrusions (32) and the annular soft sleeve (3) are an integrally formed structure.

2. A dental medical strong and weak suction handle switch knob according to claim 1, characterized in that: The annular soft sleeve (3) is made of silicone material.

3. The dental medical strong and weak suction handle switch knob according to claim 1, characterized in that: The hard valve core (1) is made of hard plastic by injection molding.

4. The dental medical strong and weak suction handle switch knob according to claim 1, characterized in that: The hard valve core (1) comprises a circular tube portion (12), two circular shaft portions (13) and two circular shaft blocks (14), wherein the two circular shaft portions (13) are integrally formed and connected to two radially opposite ends of the circular tube portion (12); The inner sides of the two circular shaft blocks (14) are respectively connected to one end of the two circular shaft portions (13) away from the circular tube portion (12); the axial direction of the circular shaft portion (13) and the axial direction of the circular shaft block (14) are both located on the same axis; the outer circumferential surface of the circular tube portion (12), the outer circumferential surfaces of the two circular shaft portions (13) and the inner sides of the two circular shaft blocks (14) form a synchronous matching groove; the inner ring of the annular soft sleeve (3) is adapted to fit in the synchronous matching groove; and the inner cavity of the circular tube portion (12) is the valve hole (11).

5. The dental medical strong and weak suction handle switch knob according to claim 4, characterized in that: The two axial ends of the circular tube portion (12) extend into two avoidance holes (31) respectively, and the outer peripheral surface of the circular tube portion (12) is connected to the hole wall of the avoidance hole (31).

6. The dental medical strong and weak suction handle switch knob according to claim 4, characterized in that: The outer circumferential surface of the circular shaft portion (13) is provided with an avoidance recess located between the circular tube portion (12) and the circular shaft block (14), and a rubber sleeve positioning groove (15) is formed between each of the avoidance recesses and the middle part of the outer circumferential surface of the circular tube portion (12). A sealing positioning portion (33) is provided on the inner ring wall surface of the annular soft sleeve (3), and one of the sealing positioning portions (33) is adapted in each of the rubber sleeve positioning grooves (15).

7. The dental medical strong and weak suction handle switch knob according to claim 6, characterized in that: The sealing positioning portion (33) is integrally formed with the annular soft sleeve (3).

8. The dental medical strong and weak suction handle switch knob according to claim 1, characterized in that: The hard valve core (1) is provided with a handle (4) for linking the hard valve core (1) to rotate.

9. The dental medical strong and weak suction handle switch knob according to claim 8, characterized in that: The two axial end faces of the hard valve core (1) are both provided with a retaining groove (16); the lever (4) is U-shaped; the two swing arm portions (42) of the lever (4) respectively correspond to the two axial end faces of the hard valve core (1); and the swing arm portions (42) are provided with a retaining protrusion (43) adapted to fit in the retaining groove (16).

10. A dental medical strong and weak suction handle switch knob according to any one of claims 1 to 9, characterized in that: The invention also comprises a strong suction head (2), wherein a mounting circular hole (21) is provided on the outer side of the strong suction head (2), and the hard valve core (1) is rotatably fitted in the mounting circular hole (21); a first channel (22) and a second channel (23) are respectively provided at both ends of the strong suction head (2), and the liquid outlet end of the first channel (22) and the liquid inlet end of the second channel (23) both penetrate the hole wall of the mounting circular hole (21), and the liquid outlet end of the first channel (22) and the liquid inlet end of the second channel (23) can be communicated with each other through the valve hole (11).

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