Animal husbandry oral cavity dilator for animal husbandry and veterinary medicine

By designing an anti-positioning mechanism and an expansion locking mechanism in the animal husbandry oral opener, the problems of instability of existing equipment and imbalance of oral openness are solved, and higher stability and convenience are achieved, and it is suitable for oral treatment operations of animal husbandry and veterinary doctors.

CN120036986AActive Publication Date: 2025-05-27LELING ANIMAL HUSBANDRY DEVELOPMENT CENTER (LELING ANIMAL HEALTH QUARANTINE CENTER)
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Patent Information

Application Number
CN202510533905.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-27
Publication Date
2025-05-27
Estimated Expiration
2045-04-27

AI Technical Summary

Technical Problem

The existing livestock oral opener is unstable during use, causing the livestock's head to swing, increasing the difficulty and risk of operation. At the same time, the oral opener is unbalanced, affecting the treatment operation.

Method used

An animal husbandry oral opening device including an anti-positioning mechanism and an expansion locking mechanism is designed. Through the linkage between the expansion locking mechanism and the anti-positioning mechanism, the livestock neck is fixed to avoid head swing, and stable oral opening is achieved through the cooperation of the mouth-expanding bend plate and the tooth-tooth plate rod.

Benefits of technology

It improves the stability and convenience of use of the equipment, avoids the operational difficulties and safety risks caused by swinging the head of livestock, and ensures the balance of oral opening, making it convenient for treatment operations.

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Abstract

The invention discloses an animal husbandry oral cavity dilator for animal husbandry veterinarians, and relates to the technical field of animal husbandry oral cavities. The animal husbandry oral cavity dilator comprises an anti-retreat positioning mechanism, the anti-retreat positioning mechanism comprises a positioning base, and an expansion locking mechanism is mounted on the upper portion of the positioning base. According to the animal husbandry oral cavity dilator for animal husbandry and veterinary surgeons, by means of combined use of a retreat-preventing positioning mechanism and an expansion locking mechanism, the whole expansion locking mechanism and the retreat-preventing positioning mechanism can be fixedly connected through linkage between the expansion locking mechanisms; meanwhile, the mouth of the livestock is opened through two mouth expanding bent plates, an upper transverse plate and a lower transverse plate can be locked to the surface of a tooth plate rod, and after the mouth of the livestock is opened, the head of the livestock can be limited through the mouth expanding bent plates, a lower stopping plate and an upper stopping plate; the head of the livestock is prevented from swinging to affect operation, and use of workers is facilitated.
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Description

Technical Field

[0001] The present invention relates to the technical field of livestock oral care, and specifically to a livestock oral dilator for veterinary use in livestock. Background Art

[0002] In animal husbandry, domesticated animals such as livestock are utilized. Through artificial feeding and breeding, plant energy such as forage and feed is converted into animal energy. When breeding livestock, it is necessary to open the oral cavity for treatment and examination. Existing livestock oral dilators only open the mouth of the animal, and it is easy to drop the livestock oral dilator during use. At this time, it is necessary to interrupt the medicine administration and gastric lavage operations and re-open the mouth of the animal, which is troublesome and inconvenient to operate. Existing patent documents have made improvements in this regard.

[0003] For example, in Chinese Patent CN216985286U, a livestock oral dilator for veterinary use in livestock includes an appliance main body. The appliance main body includes a holding rod and a movable arm. Elastic material limiting rings are fixed on the left and right sides of the holding rod. A connecting block is connected to one side of the movable arm close to the holding rod. A driving disk is connected between one side of the connecting block and the movable arms. A spreading block is connected to the side of the movable arm far from the holding rod. A lateral plate is connected to the outside of the spreading block. A number of groups of one-way holes are provided on the surface of the lateral plate. By setting the holding rod, movable arm, connecting block, driving disk and spreading block, the oral cavity of livestock can be conveniently spread, which is more labor-saving and convenient to use, making the equipment more efficient when in use.

[0004] Although the equipment in the above document can conveniently open the mouth of livestock, reduce the resistance of rejection, and prevent the hand from falling off, it still has obvious defects in actual use, such as: Although the equipment can conveniently open the mouth of livestock, the livestock will feel uncomfortable when opening the mouth, so the head will swing forcefully. In this state, even if the staff has great strength, it is difficult to firmly hold the handle of the equipment by hand. And even if it can be held, it is a physical confrontation between humans and livestock, which is not only inefficient but also increases the risk. At the same time, when the equipment opens the mouth of livestock, it can only be spread on both sides or in the middle. When using it on one side of the two sides, it will only cause the imbalance of the oral cavity spread on the other side. If it is in the middle, it is easy to block the oral cavity, which is not convenient for the staff to use tools for treatment operations; Therefore, a livestock oral dilator for veterinary use in livestock that can increase stability and facilitate operation is now designed to solve such defects. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a livestock oral dilator for veterinary use in livestock, which solves the problems of unstable use and inconvenient treatment of existing oral dilators.

[0006] To achieve the above object, the present invention is realized by the following technical solutions: A livestock oral dilator for veterinary use, including a retraction and positioning mechanism, the retraction and positioning mechanism includes a positioning base, and an expansion and locking mechanism is installed on the upper part of the positioning base.

[0007] Preferably, the top of the positioning base is fixedly connected with a lower retraction plate through a bracket, an upper retraction plate is arranged on the top of the lower retraction plate, annular bayonets for matching use are respectively arranged on the surfaces of the lower retraction plate and the upper retraction plate, positioning sockets penetrating through to the bottom are respectively arranged on both sides of the top of the lower retraction plate, positioning insertion rods are fixedly connected to both sides of the bottom of the upper retraction plate through fixing blocks, and the bottom ends of the positioning insertion rods extend to the inside of the positioning sockets.

[0008] Preferably, tooth plate rods are fixedly connected to both sides of the surfaces of the lower retraction plate and the upper retraction plate through fixing blocks, concave sliding grooves are respectively arranged on the opposite sides of the upper and lower tooth plate rods, and a flipping groove opening is arranged on the upper part of the surface of the upper retraction plate.

[0009] Preferably, a rotating cross bar is rotatably connected between both sides of the inner cavity of the flipping groove opening through a bearing member, a supporting rotating frame is fixedly connected to the surface of the rotating cross bar, gears are fixedly connected to both sides of the surface of the rotating cross bar, a metal hose is fixedly connected to the surface of the supporting rotating frame through a fixing block, and a plurality of metal hoses are provided. A lighting lamp is fixedly connected to the bottom end of the middle metal hose, and snap rings are fixedly connected to the bottom ends of both sides of the metal hoses through fixing blocks.

[0010] Preferably, the expansion and locking mechanism includes an upper horizontal plate and a lower horizontal plate. Guide sockets for matching use with the tooth plate rods and the concave sliding grooves are respectively arranged on both sides of the surfaces of the upper horizontal plate and the lower horizontal plate, and the upper horizontal plate and the lower horizontal plate are slidably installed on the surfaces of the tooth plate rods through the guide sockets.

[0011] Preferably, circular rotating grooves are respectively arranged on both sides of the tops of the upper horizontal plate and the lower horizontal plate. A threaded rod is rotatably connected between the inner sides of the two circular rotating grooves on the same side through a bearing member, and longitudinal tooth plates for matching use with the gears are fixedly connected to both sides of the rear part of the upper horizontal plate through fixing blocks.

[0012] Preferably, upper and lower parts of the surface of the threaded rod are both threadedly connected with threaded sleeves, and an expanding nozzle bent plate is fixedly connected between the two threaded sleeves, and the two expanding nozzle bent plates are used in cooperation with each other.

[0013] Preferably, a sliding collar is fixedly connected to one side of the threaded sleeve away from the flared nozzle bent plate. A lifting pressure rod is slidably installed inside the sliding collar. One end of the lifting pressure rod away from the sliding collar is fixedly connected with a concave clamping tooth used in cooperation with the toothed plate rod. A spring is sleeved on the surface of the lifting pressure rod.

[0014] Preferably, bearing ring frames are fixedly connected to both sides of the bottom of the lower horizontal plate through fixing blocks. A worm gear is fixedly connected to the bottom end of the threaded rod through a fixing block.

[0015] Preferably, a driven rod is rotatably connected between the inner sides of the two bearing ring frames. Threaded grooves meshing with the worm gear are formed on both sides of the surface of the driven rod. Multi-sided knobs are fixedly connected to both ends of the driven rod.

[0016] The present invention provides a livestock oral dilator for veterinary use. Compared with the existing technology, it has the following beneficial effects: (1) For this livestock oral dilator for veterinary use, by using the retarding positioning mechanism and the expansion locking mechanism in a combined manner, the settings of these structures can utilize the linkage between the structures of the expansion locking mechanism to fixedly connect the entire expansion locking mechanism with the retarding positioning mechanism, thereby clamping the neck of the livestock to prevent the head from stretching back and forth. At the same time, the two flared nozzle bent plates open the mouth of the livestock, and can lock the upper horizontal plate and the lower horizontal plate on the surface of the toothed plate rod. After opening the mouth of the livestock, the head of the livestock can be limited by the flared nozzle bent plates plus the upper and lower retarding plates, avoiding the head swing of the livestock from affecting the operation, which is convenient for the staff to use.

[0017] (2) For this livestock oral dilator for veterinary use, by installing a worm gear meshing with the threaded groove at the bottom end of the threaded rod and using it in cooperation with the concave clamping tooth, the settings of these structures can drive the two threaded rods to rotate synchronously by rotating the driven rod, so that the upper and lower flared nozzle bent plates can press the four concave clamping teeth and accurately mesh with the toothed plate rod at the same time, thus quickly completing the locking between the expansion locking mechanism and the retarding positioning mechanism. When the flared nozzle bent plates expand the mouth of the livestock, it can avoid the livestock feeling uncomfortable and swinging its head, causing the equipment to shake and shift, improving the stability and smoothness during expansion. And the setting of the upper and lower flared nozzle bent plates can effectively avoid blocking the oral cavity, facilitating oral operations.

[0018] (3) The livestock and veterinary oral retractor has a support rotating frame installed inside the flipping notch through a rotating cross bar, and several metal hoses are installed on one side of the support rotating frame. The setting of these structures can drive the support rotating frame to flip the lighting lamp and the snap ring buckle to the front when installing the expansion locking mechanism and the anti-retreat positioning mechanism, and the bendable metal hoses can adjust the lighting lamp and the snap ring buckle at multiple angles. The adjusted lighting lamp can illuminate the oral cavity, and the snap ring buckle can assist in fixing tools such as syringes, improving the overall practicality and functionality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a rear view of the structure of the lower anti-retreat plate, upper anti-retreat plate and annular bayonet of the present invention; Figure 3 is a schematic structural diagram of the anti-retreat positioning mechanism of the present invention; Figure 4 is a schematic structural diagram of the positioning socket, positioning plug and tooth plate rod structure of the present invention; Figure 5 is a schematic structural diagram of the gear, metal hose and lighting lamp structure of the present invention; Figure 6 is a schematic structural diagram of the expansion locking mechanism of the present invention; Figure 7 is a schematic structural diagram of the threaded sleeve, mouth-expanding bent plate and sliding collar structure of the present invention; Figure 8 is a schematic structural diagram of the worm gear, bearing ring frame and driven rod structure of the present invention.

[0020] In the figure: 1. Anti-retreat positioning mechanism; 2. Expansion locking mechanism; 101. Positioning base; 102. Lower anti-retreat plate; 103. Upper anti-retreat plate; 104. Annular bayonet; 105. Positioning socket; 106. Positioning plug; 107. Tooth plate rod; 108. Concave chute; 109. Flipping notch; 110. Rotating cross bar; 111. Support rotating frame; 112. Gear; 113. Metal hose; 114. Lighting lamp; 115. Snap ring buckle; 201. Upper horizontal plate; 202. Lower horizontal plate; 203. Circular rotating groove; 204. Threaded rod; 205. Guide socket; 206. Longitudinal tooth plate; 207. Threaded sleeve; 208. Mouth-expanding bent plate; 209. Sliding collar; 210. Lifting pressure rod; 211. Concave teeth; 212. Spring; 213. Worm gear; 214. Bearing ring frame; 215. Driven rod; 216. Worm thread groove; 217. Multi-angle knob. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-8 , the present invention provides a technical solution: a livestock and veterinary oral retractor for livestock, including a retraction and positioning mechanism 1, and the retraction and positioning mechanism 1 includes a positioning base 101, and an expansion and locking mechanism 2 is installed on the upper part of the positioning base 101.

[0023] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 , which shows the overall structure of the retraction and positioning mechanism 1. The top of the positioning base 101 is fixedly connected to a lower retraction plate 102 through a bracket. An upper retraction plate 103 is arranged on the top of the lower retraction plate 102. Ring-shaped bayonets 104 that cooperate with each other are provided on the surfaces of the lower retraction plate 102 and the upper retraction plate 103. Positioning sockets 105 penetrating through to the bottom are provided on both sides of the top of the lower retraction plate 102. Positioning rods 106 are fixedly connected to both sides of the bottom of the upper retraction plate 103 through fixing blocks, and the bottom ends of the positioning rods 106 extend to the inside of the positioning sockets 105. Tooth plate rods 107 are fixedly connected to both sides of the surfaces of the lower retraction plate 102 and the upper retraction plate 103 through fixing blocks. Concave sliding grooves 108 are provided on the sides of the upper and lower tooth plate rods 107 facing away from each other. A flipping notch 109 is provided on the upper part of the surface of the upper retraction plate 103. A rotating cross bar 110 is rotatably connected between the two sides of the inner cavity of the flipping notch 109 through a bearing member. A support rotating frame 111 is fixedly connected to the surface of the rotating cross bar 110. Gears 112 are fixedly connected to both sides of the surface of the rotating cross bar 110. A metal hose 113 is fixedly connected to the surface of the support rotating frame 111. The metal hose 113 can be bent and positioned and adjusted in orientation, and a plurality of metal hoses 113 are provided. A lighting lamp 114 is fixedly connected to the bottom end of the middle metal hose 113. Snap rings 115 are fixedly connected to the bottom ends of the metal hoses 113 on both sides through fixing blocks.

[0024] Before use, first fix the positioning base 101 to the ground using the bolt assembly, and at the same time position the lower anti-recoil plate 102. Subsequently, install the upper anti-recoil plate 103 on the top of the lower anti-recoil plate 102, and insert the positioning rod 106 into the inner side of the positioning socket 105. When in use, first pull up the upper anti-recoil plate 103 by the limit of the positioning rod 106, then pass the livestock through the annular bayonet 104 and lower the upper anti-recoil plate 103. At this time, the neck of the livestock is stuck by the annular bayonet 104. Then lift the entire expansion locking mechanism 2 so that the four guiding sockets 205 are aligned with the toothed plate rod 107 and installed. After the guiding sockets 205 are aligned with the toothed plate rod 107, push the entire expansion locking mechanism 2 to slide backward until the two closed nozzle bending plates 208 are placed in the mouth of the livestock and stop moving. While the expansion locking mechanism 2 moves backward, the teeth at the top of the two longitudinal toothed plates 206 will first engage with the gear 112 and drive the support rotating frame 111 to rotate 180 degrees, rotating the lighting lamp 114 and the snap ring buckle 115 to the front part.

[0025] Please refer to Figure 6 、 Figure 7 and Figure 8, which shows the overall structure of the expansion locking mechanism 2. The expansion locking mechanism 2 includes an upper transverse plate 201 and a lower transverse plate 202. On both sides of the surfaces of the upper transverse plate 201 and the lower transverse plate 202, there are guiding sockets 205 that are used in cooperation with the toothed plate rod 107 and the concave chute 108. The upper transverse plate 201 and the lower transverse plate 202 are both slidably installed on the surface of the toothed plate rod 107 through the guiding sockets 205. On both sides of the tops of the upper transverse plate 201 and the lower transverse plate 202, there are circular rotating grooves 203. Between the inner sides of the two circular rotating grooves 203 on the same side, there is a threaded rod 204 rotatably connected through a bearing member. The thread grooves on the upper and lower parts of the surface of the threaded rod 204 are arranged in opposite directions. On both sides of the rear part of the upper transverse plate 201, there are longitudinal toothed plates 206 fixedly connected through fixing blocks and used in cooperation with the gear 112. The upper and lower parts of the surface of the threaded rod 204 are both threadedly connected with threaded sleeves 207. There is an expanding nozzle bent plate 208 fixedly connected between the two threaded sleeves 207. The surface of the expanding nozzle bent plate 208 is wrapped with a rubber layer to protect the oral cavity. The two expanding nozzle bent plates 208 are used in cooperation with each other. On the side of the threaded sleeve 207 away from the expanding nozzle bent plate 208, there is a sliding collar 209 fixedly connected through a fixing plate. Inside the sliding collar 209, there is a lifting pressure rod 210 slidably installed. One end of the lifting pressure rod 210 away from the sliding collar 209 is fixedly connected with a concave clamping tooth 211 used in cooperation with the toothed plate rod 107. A spring 212 is sleeved on the surface of the lifting pressure rod 210. On both sides of the bottom of the lower transverse plate 202, there are bearing ring frames 214 fixedly connected through fixing blocks. The bottom end of the threaded rod 204 is fixedly connected with a worm gear 213 through a fixing block. Between the inner sides of the two bearing ring frames 214, there is a driven rod 215 rotatably connected. On both sides of the surface of the driven rod 215, there are worm thread grooves 216 meshed with the worm gear 213. At both ends of the driven rod 215, there are multi-sided knobs 217 fixedly connected.

[0026] After the mouth-expanding curved plate 208 is located inside the livestock's mouth, rotate the two multi-angle knobs 217. Driven by the limit of the bearing ring frame 214, the driven rod 215 rotates. At this time, since the worm gear 213 and the worm thread groove 216 are in a meshing relationship, when the driven rod 215 rotates, it will drive the two threaded rods 204 to rotate synchronously. When the threaded rods 204 rotate, the threaded sleeve 207 will drive the upper and lower mouth-expanding curved plates 208 to move away from each other. At this time, the opened mouth-expanding curved plates 208 will expand and open the livestock's mouth. When the mouth-expanding curved plate 208 moves up and down, it will push the concave-shaped teeth 211 on the upper and lower parts to first engage with the teeth of the tooth plate rod 107, and then the sliding collar 209 will continue to slide and compress the spring 212. After the mouth-expanding curved plate 208 opens the livestock's mouth to an appropriate height, stop rotating the driven rod 215. At this time, through the engagement of the concave-shaped teeth 211 and the tooth plate rod 107, the expansion locking mechanism 2 is completely positioned with the tooth plate rod 107. At the same time, the docking of the guiding socket 205 and the tooth plate rod 107 also fixes the lower anti-receding plate 102 and the upper anti-receding plate 103. At this time, the equipment installation is completed. Then, pull the metal hose 113 to let the lighting lamp 114 illuminate the livestock's mouth, and use tools to conduct quality inspection on the livestock. The syringe can be stuck inside the snap ring buckle 115 for auxiliary injection. After the inspection is completed, rotate the driven rod 215 in the reverse direction to drive the two mouth-expanding curved plates 208 to close towards each other to close the livestock's mouth. At the same time, the spring 212 pushes the concave-shaped teeth 211 to separate from the tooth plate rod 107. At this time, the guiding socket 205 loses its lock, and pull the expansion locking mechanism 2 to withdraw from the surface of the tooth plate rod 107. Then, push up the upper anti-receding plate 103 to separate it from the lower anti-receding plate 102, and then pull the livestock out from the inside of the annular bayonet 104.

[0027] At the same time, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A livestock oral retractor for veterinary use, comprising a retraction prevention and positioning mechanism (1), characterized in that: The anti-retraction positioning mechanism (1) comprises a positioning base (101), and an expansion locking mechanism (2) is installed on the upper part of the positioning base (101); The top of the positioning base (101) is fixedly connected to a lower anti-recoil plate (102) via a bracket, and an upper anti-recoil plate (103) is arranged on the top of the lower anti-recoil plate (102). The surfaces of the lower anti-recoil plate (102) and the upper anti-recoil plate (103) are provided with annular bayonet holes (104) for use with each other, and both sides of the top of the lower anti-recoil plate (102) are provided with positioning sockets (105) extending through to the bottom, and both sides of the bottom of the upper anti-recoil plate (103) are fixedly connected to positioning rods (106) via fixing blocks, and the bottom ends of the positioning rods (106) extend to the inner sides of the positioning sockets (105).

2. The animal husbandry and veterinary oral retractor according to claim 1, characterized in that: Both sides of the surfaces of the lower anti-recoil plate (102) and the upper anti-recoil plate (103) are fixedly connected to toothed plate rods (107) via fixing blocks, and the upper side of the toothed plate rods (107) opposite to the lower side is provided with a concave sliding groove (108), and the upper part of the surface of the upper anti-recoil plate (103) is provided with a flip notch (109).

3. The oral retractor for animal husbandry and veterinary medicine according to claim 2, characterized in that: A rotating cross bar (110) is rotatably connected between the two sides of the inner cavity of the flip notch (109) via a bearing member, the surface of the rotating cross bar (110) is fixedly connected to a supporting rotating frame (111), both sides of the surface of the rotating cross bar (110) are fixedly connected to gears (112), the surface of the supporting rotating frame (111) is fixedly connected to a metal hose (113) via a fixing block, and a plurality of metal hoses (113) are provided, the bottom end of the middle metal hose (113) is fixedly connected to an illuminating lamp (114), and the bottom ends of the metal hoses (113) on both sides are fixedly connected to snap ring buckles (115) via fixing blocks.

4. The oral retractor for animal husbandry and veterinary medicine according to claim 3, characterized in that: The expansion locking mechanism (2) comprises an upper transverse plate (201) and a lower transverse plate (202), and guide sockets (205) for use with a tooth plate rod (107) and a concave slide groove (108) are provided on both sides of the surface of the upper transverse plate (201) and the lower transverse plate (202), and the upper transverse plate (201) and the lower transverse plate (202) are slidably mounted on the surface of the tooth plate rod (107) via the guide sockets (205).

5. The oral cavity retractor for animal husbandry and veterinary medicine according to claim 4, characterized in that: Circular rotation grooves (203) are provided on both sides of the top of the upper transverse plate (201) and the lower transverse plate (202); a threaded rod (204) is rotatably connected between the inner sides of the two circular rotation grooves (203) on the same side via a bearing member; and longitudinal toothed plates (206) used in conjunction with the gear (112) are fixedly connected to both sides of the rear portion of the upper transverse plate (201) via a fixing block.

6. The oral retractor for animal husbandry and veterinary medicine according to claim 5, characterized in that: The upper and lower parts of the surface of the threaded rod (204) are both threadedly connected with threaded sleeves (207), a nozzle expansion bent plate (208) is fixedly connected between the two threaded sleeves (207), and the two nozzle expansion bent plates (208) are used in conjunction with each other.

7. The oral retractor for animal husbandry and veterinary medicine according to claim 6, characterized in that: The side of the threaded sleeve (207) away from the expansion nozzle bend plate (208) is fixedly connected to a sliding collar (209) via a fixing plate, and a lifting and lowering pressure rod (210) is slidably mounted on the inner side of the sliding collar (209), and one end of the lifting and lowering pressure rod (210) away from the sliding collar (209) is fixedly connected to a concave clamping tooth (211) used in conjunction with the tooth plate rod (107), and a spring (212) is sleeved on the surface of the lifting and lowering pressure rod (210).

8. The oral retractor for animal husbandry and veterinary medicine according to claim 7, characterized in that: Both sides of the bottom of the lower transverse plate (202) are fixedly connected to a bearing ring frame (214) via a fixing block, and the bottom end of the threaded rod (204) is fixedly connected to a worm gear (213) via a fixing block.

9. The oral retractor for animal husbandry and veterinary medicine according to claim 8, characterized in that: A driven rod (215) is rotatably connected between the inner sides of the two bearing ring frames (214), and both sides of the surface of the driven rod (215) are provided with worm grooves (216) meshing with the worm wheel (213), and both ends of the driven rod (215) are fixedly connected with a polygonal knob (217).

Citation Information

Patent Citations

  • Canine oral cavity examination assist device with fixing function

    CN113116592A

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    CN208876902U

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    CN214342799U

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    CN216985286U