Novel injection device for laboratory animals

Abstract

The application discloses an experimental animal injection device, and belongs to the field of veterinary medical instruments.The injection device comprises a syringe, a needle head arranged at the lower end of a piston part of the syringe, a protective sleeve arranged at the needle head of the syringe and used for protecting the needle head part, a through hole arranged on the protective sleeve and used for allowing the needle head to extend out, a limiting platform arranged on the piston part and used for limiting the protective sleeve, a sliding sleeve arranged at the lower end of the protective sleeve, a reset spring arranged between the protective sleeve and the sliding sleeve, three circumferentially distributed shielding plates arranged at the lower end of the sliding sleeve, and a rotating shaft head fixedly arranged on the shielding plates.The experimental animal injection device has the beneficial effect that the shielding plates can be rotated to shield the opening and the through hole when the injection device is not used, thereby avoiding pollution, and the shielding plates can be rotated to no longer shield the opening and the through hole when the injection device is used, thereby facilitating the needle head to extend out and be used for injection.

Description

Technical Field

[0001] This application relates to the field of veterinary medical devices, and more specifically, to novel injection devices for laboratory animals. Background Technology

[0002] In drug development, animal experiments are required in the early stages. Generally, the drug is injected into animals multiple times at different dosages to observe adverse reactions. Syringes are usually used to inject the drug. However, if the syringe is not used to inject animals, the entire needle will be exposed to the outside. This not only makes it easy for people to come into contact with the drug, causing injury and infection risks, but also causes needle contamination if the entire syringe is dropped on the ground. Usually, a protective cover is installed on the injection needle, which is removed when the drug is used.

[0003] However, during multiple injections, the protective cover needs to be repeatedly removed to draw up the medication, and then put back on after the medication is drawn up. The protective cover is then removed again before the injection, making the process quite cumbersome.

[0004] Therefore, a retractable protective sleeve is generally used. When drawing up drugs or making injections, the needle extends out of the protective sleeve, and when not in use, the needle retracts into the protective sleeve. However, this requires the protective sleeve to have a through hole for the needle to extend, which cannot isolate external contamination.

[0005] Therefore, a novel injection device for laboratory animals is needed to solve the above problems. Utility Model Content

[0006] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0007] To address the technical problems mentioned in the background section, some embodiments of this application provide a novel injection device for laboratory animals, comprising: a syringe having a piston portion and a needle disposed at the lower end of the piston portion; a protective sleeve fitted over one end of the needle of the syringe to protect the needle portion, the protective sleeve having a through hole for the needle to extend out, and the piston portion having a limiting platform for limiting the protective sleeve; a sealing assembly for blocking the through hole on the protective sleeve; the sealing assembly comprising: a sliding sleeve fitted over the lower end of the protective sleeve, the lower end of the sliding sleeve having an opening coaxially arranged with the through hole; a return spring disposed between the protective sleeve and the sliding sleeve, the two ends of the return spring being fixedly connected to the protective sleeve and the sliding sleeve respectively; three baffles disposed circumferentially at the lower end of the sliding sleeve, the three baffles cooperating to block the opening; and a rotating shaft fixedly disposed on the baffles, the baffles blocking or opening the opening by rotating around the axis of the rotating shaft.

[0008] The protective sleeve protects the syringe needle from contamination. The sliding sleeve and baffle plate allow the baffle plate to rotate and block the opening and through-hole when not in use, preventing contamination. During injection, the baffle plate rotates to remove the blockage, allowing the needle to extend for injection.

[0009] Furthermore, one end of the rotating shaft head passes through the sliding sleeve and is rotatably connected to the sliding sleeve. A protrusion extending perpendicular to the axis of the rotating shaft head is fixedly connected to one end of the rotating shaft head. A guide hole with an opening at the lower end is provided on the protective sleeve. The guide hole allows one end of the rotating shaft head to be inserted and drive the rotating shaft head to rotate.

[0010] With the designed rotating shaft head, protrusion, and guide hole, when the sliding sleeve slides on the protective sleeve, the rotating shaft head extends into the guide hole and drives the rotating shaft head to rotate.

[0011] Furthermore, a guide groove for embedding the protrusion is provided on the side wall of the guide hole, and the guide groove extends spirally in the axial direction of the guide hole.

[0012] With the help of the guide groove, the guide groove cooperates with the protrusion. When the rotating shaft head is inserted into the guide hole, the protrusion is embedded in the guide groove. The rotating shaft head moves axially in the guide hole, causing the protrusion to slide in the guide groove, thereby driving the rotating shaft head to rotate.

[0013] Furthermore, a hair removal comb is provided at the lower end of the baffle.

[0014] When the shield is deflected and opened, the tufted hair at the injection site is combed out by the tufting brush to avoid affecting the needle insertion.

[0015] Furthermore, the piston portion of the syringe is fitted with an installation sleeve, which is located on the upper side of the protective sleeve. A positioning screw is threaded onto the installation sleeve, and one end of the positioning screw passes through the installation sleeve and abuts against the side wall of the piston portion. A compression spring is provided between the installation sleeve and the protective sleeve.

[0016] By adjusting the position of the mounting sleeve on the piston part using the mounting sleeve and positioning screw, when the protective sleeve slides to allow the needle to extend for injection, the upper end of the protective sleeve abuts against the lower end of the mounting sleeve to limit the movement of the protective sleeve.

[0017] Furthermore, an abutment plate is fixedly connected to the upper end of the protective sleeve, and a limit plate is fixedly connected to the lower end of the mounting sleeve. The limit plate is used to limit the movement of the protective sleeve.

[0018] With the abutment plate and the limiting plate in place, when the protective sleeve slides to extend the needle for injection, the abutment plate contacts the limiting plate. By adjusting the position of the mounting sleeve, the length of the needle extending out of the protective sleeve can be adjusted.

[0019] Furthermore, a screw is rotatably connected to the abutment plate, and a threaded sleeve that is threadedly connected to the screw is fitted on the screw. The threaded sleeve passes through the limiting plate and slides in fit with the limiting plate. The lower end of the threaded sleeve abuts against the abutment plate to limit the protective sleeve.

[0020] By using a screw and a threaded sleeve, rotating the screw allows the threaded sleeve to slide in the up and down direction, thereby adjusting the distance between the lower end of the threaded sleeve and the abutment plate, and controlling the movement distance of the protective sleeve.

[0021] Furthermore, a positioning support is provided at the lower end of the sliding sleeve, and a notch is provided on the positioning support for the baffle plate to pass through.

[0022] The positioning support makes it easy for the needle to be aligned with the injection area, and at the same time, it comes into contact with the injection area during injection, pushing the sliding sleeve to move.

[0023] The beneficial effects of this application are as follows:

[0024] 1. The protective sleeve protects the syringe needle, preventing needle contamination. The sliding sleeve and the baffle plate allow the baffle plate to be rotated to block the opening and through-hole when not in use, preventing contamination. During injection, the baffle plate can be rotated to remove the obstruction of the opening and through-hole, allowing the needle to extend for injection.

[0025] 2. With the provided rotating shaft head, protrusion, and guide hole, when the sliding sleeve slides on the protective sleeve, the rotating shaft head extends into the guide hole. Through the provided guide groove, the guide groove cooperates with the protrusion. When the rotating shaft head is inserted into the guide hole, the protrusion is embedded in the guide groove. The rotating shaft head moves axially in the guide hole, causing the protrusion to slide in the guide groove, thereby driving the rotating shaft head to rotate, which in turn causes the baffle plate to open and rotate.

[0026] 3. By setting the mounting sleeve and positioning screw, and adjusting the position of the mounting sleeve on the piston part, and by setting the abutment plate, limit plate, screw and threaded sleeve, when the screw is rotated, the threaded sleeve can slide in the up and down direction, thereby adjusting the distance between the lower end of the threaded sleeve and the abutment plate. Controlling the movement distance of the protective sleeve can adjust the length of the needle extending out of the protective sleeve. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0028] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0029] In the attached diagram:

[0030] Figure 1 This is an overall schematic diagram according to one embodiment of the present application;

[0031] Figure 2 yes Figure 1 The installation diagram of the mounting sleeve in the embodiment is shown below;

[0032] Figure 3 yes Figure 1 The installation diagram of the sliding sleeve in the embodiment is shown below;

[0033] Figure 4 yes Figure 1 The installation diagram of the shielding plate in the embodiment is shown below;

[0034] Figure 5 yes Figure 1 A schematic diagram of the second state of the shield in the embodiment;

[0035] Figure 6 yes Figure 1 A schematic diagram of the shielding plate structure in the embodiment;

[0036] Figure 7 yes Figure 1 The schematic diagram of the guide hole in the embodiment is shown.

[0037] Figure label:

[0038] 100. Syringe; 101. Protective sleeve; 102. Through hole; 103. Sliding sleeve; 104. Opening; 105. Return spring; 106. Baffle plate; 107. Rotating shaft head; 108. Piston part; 109. Needle; 110. Limiting platform; 111. Upper part; 112. Lower part; 113. Protrusion; 114. Guide hole; 115. Guide groove; 116. Hair removal comb; 117. Mounting sleeve; 118. Positioning screw; 119. Compression spring; 120. Abutment plate; 121. Limiting plate; 122. Screw; 123. Threaded sleeve; 124. Positioning support. Detailed Implementation

[0039] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0040] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0041] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0042] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0043] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] Reference Figure 1-7A novel injection device for laboratory animals includes: a syringe 100, a protective sleeve 101, a through hole 102, a sliding sleeve 103, an opening 104, a return spring 105, a baffle plate 106, and a rotating shaft head 107. The syringe 100 has a piston portion 108 and a needle 109 located at the lower end of the piston portion 108. Medication within the piston portion 108 is injected through the needle 109 via a piston rod. The protective sleeve 101 is fitted over one end of the needle 109, extending to the piston portion 108. A limiting platform 110 is provided on the piston portion 108, limiting the movement of the protective sleeve 101 so that it can only move upwards relative to the syringe 100. The protective sleeve 101 can be a split design, including an upper portion 111 and a lower portion 112, which are connected by threads. The lower end of the protective sleeve 101 is provided with a through hole 102, through which the needle 109 extends for injection. A sliding sleeve 103 is fitted onto the lower end of the protective sleeve 101, and an opening 104 coaxially arranged with the through hole 102 is formed at the lower end of the sliding sleeve 103. Three circumferentially distributed baffles 106 are rotatably connected to the bottom end of the sliding sleeve 103, and the three baffles 106 cooperate to block the opening 104. A rotating shaft head 107 is fixedly connected to each baffle 106, which rotatably engages with the sliding sleeve 103. By rotating the baffle 106 around the rotating shaft head 107, the baffle 106 has two states: in the first state, it blocks and closes the opening 104; in the second state, the baffle 106 moves to a position away from the opening 104, no longer blocking it, and the needle 109 can extend through the through hole 102 and the opening 104. A return spring 105 is provided between the protective sleeve 101 and the sliding sleeve 103. When injection is performed, the lower end of the sliding sleeve 103 abuts against the injection area, causing the sliding sleeve 103 to move relative to the protective sleeve 101 and compress the return spring 105.

[0045] One end of the rotating shaft head 107 passes through the sliding sleeve 103 and is fixedly provided with a protrusion 113. The protrusion 113 extends perpendicularly to the axis of the rotating shaft head 107 and protrudes from the side of the rotating shaft head 107. The protective sleeve 101 has a guide hole 114 with a lower opening 104, and the rotating shaft head 107 is inserted into the guide hole 114. The side wall of the guide hole 114 has a guide groove 115 for the protrusion 113 to be inserted. The guide groove 115 extends spirally along the axis of the guide hole 114, so that when the rotating shaft head 107 moves up and down in the guide hole 114, the rotating shaft head 107 rotates under the action of the protrusion 113 and the guide groove 115.

[0046] In one embodiment, a hair removal comb 116 is fixedly provided at the lower end of the baffle plate 106. When the baffle plate 106 rotates around the axis of the rotating shaft head 107, it drives the hair removal comb 116 to comb out the clumps of hair in the injection area.

[0047] The piston portion 108 of the syringe 100 is fitted with a mounting sleeve 117, which is located above the protective sleeve 101. A positioning screw 118 is threaded onto the mounting sleeve 117, and one end of the positioning screw 118 passes through the mounting sleeve 117 and abuts against the side wall of the piston portion 108. A compression spring 119 is provided between the mounting sleeve 117 and the protective sleeve 101. The compression spring 119 is always in a compressed state. When it is necessary to adjust the injection length of the needle 109, the distance between the mounting sleeve 117 and the protective sleeve 101 is adjusted by sliding the mounting sleeve 117 on the piston portion 108, and the mounting sleeve 117 is positioned by the positioning screw 118. The spring force of the return spring 105 is less than that of the compression spring 119, so that when the sliding sleeve 103 is pressed, the return spring 105 is compressed first.

[0048] In one embodiment, an abutment plate 120 is fixedly connected to the upper end of the protective sleeve 101, and a limiting plate 121 is fixedly connected to the lower end of the mounting sleeve 117. The limiting plate 121 is used to limit the protective sleeve 101.

[0049] In another embodiment, a screw 122 is rotatably connected to the abutment plate 120. A threaded sleeve 123, threadedly connected to the screw 122, is fitted onto the screw 122. The threaded sleeve 123 passes through a limiting plate 121 and slides within the limiting plate 121. The lower end of the threaded sleeve 123 abuts against the abutment plate 120, limiting the position of the protective sleeve 101. When the screw 122 is rotated, the threaded sleeve 123 can be moved, thereby adjusting the distance between the lower end of the threaded sleeve 123 and the abutment plate 120.

[0050] A positioning support 124 is fixedly provided at the lower end of the sliding sleeve 103. The positioning support 124 has a notch for the baffle plate 106 to pass through. When the positioning support 124 contacts the injection area, it will cause the sliding sleeve 103 to slide relative to the protective sleeve 101, and compress the return spring 105.

[0051] Working process or usage method:

[0052] 1. Insert the syringe 100 under the upper part 111 of the protective sleeve 101. After insertion, the limiting platform 110 limits the upper part 111. Then connect the lower part 112 to the upper part 111 to install the syringe 100. When it is necessary to draw liquid medicine, the positioning support 124 causes the sliding sleeve 103 to move relative to the protective sleeve 101, compressing the return spring 105. This causes the rotating shaft head 107 to move within the guide hole 114. Under the action of the guide groove 115 and the protrusion 113, the rotating shaft head 107 rotates, causing the baffle plate 106 to deflect and open. Continue to press the positioning support 124, causing the protective sleeve 101 to move relative to the mounting sleeve 117. The compression spring 119 is compressed, and at the same time, the needle 109 extends to draw liquid medicine.

[0053] 2. When injecting, align the positioning support 124 with the injection position and push the piston of the syringe 100 so that the sliding sleeve 103 slides relative to the protective sleeve 101. At this time, the baffle 106 opens and the hair in the injection area is combed out by the hair removal comb 116. The needle 109 extends out of the opening 104 for injection. When it is necessary to adjust the length of the needle 109, rotate the screw 122, which causes the threaded sleeve 123 to move relative to the limiting plate 121. Adjust the distance between the lower end of the threaded sleeve 123 and the abutment plate 120, and then adjust the extension length of the needle 109.

[0054] 3. After the injection is completed, under the action of the compression spring 119, the protective sleeve 101 continues to be fitted on the needle 109, and under the action of the reset spring 105, the baffle covers and closes the opening 104 again.

[0055] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A novel injection device for laboratory animals, characterized in that: include: The syringe (100) has a piston portion (108) and a needle (109) disposed at the lower end of the piston portion (108); A protective sleeve (101) is fitted onto one end of the needle (109) of the syringe (100) to protect the needle (109). The protective sleeve (101) has a through hole (102) for the needle (109) to extend out. The piston part (108) is provided with a limiting platform (110) for limiting the protective sleeve (101). A sealing component is used to cover the through-hole (102) on the protective sleeve (101); The enclosed component includes: A sliding sleeve (103) is fitted onto the lower end of the protective sleeve (101), and the lower end of the sliding sleeve (103) has an opening (104) coaxially arranged with the through hole (102); A return spring (105) is disposed between the protective sleeve (101) and the sliding sleeve (103), and the two ends of the return spring (105) are fixedly connected to the protective sleeve (101) and the sliding sleeve (103) respectively. The three baffles (106) are arranged circumferentially at the lower end of the sliding sleeve (103), and the three baffles (106) cooperate to block the opening (104); The rotating shaft head (107) is fixedly mounted on the baffle plate (106). The baffle plate (106) can block the opening (104) or open the opening (104) by rotating around the axis of the rotating shaft head (107).

2. The novel injection device for laboratory animals according to claim 1, characterized in that: One end of the rotating shaft head (107) passes through the sliding sleeve (103) and is rotatably connected to the sliding sleeve (103). One end of the rotating shaft head (107) is fixedly connected to a protrusion (113) extending perpendicular to the axis of the rotating shaft head (107). The protective sleeve (101) has a guide hole (114) with a lower opening (104). The guide hole (114) allows one end of the rotating shaft head (107) to be inserted and drive the rotating shaft head (107) to rotate.

3. The novel injection device for laboratory animals according to claim 2, characterized in that: The guide hole (114) has a guide groove (115) on its side wall for embedding the protrusion (113), and the guide groove (115) extends spirally in the axial direction of the guide hole (114).

4. The novel injection device for laboratory animals according to claim 3, characterized in that: A hair removal comb (116) is provided at the lower end of the baffle plate (106).

5. The novel injection device for laboratory animals according to claim 1, characterized in that: The piston portion (108) of the syringe (100) is fitted with an installation sleeve (117). The installation sleeve (117) is located on the upper side of the protective sleeve (101). A positioning screw (118) is threaded onto the installation sleeve (117). One end of the positioning screw (118) passes through the installation sleeve (117) and abuts against the side wall of the piston portion (108). A compression spring (119) is provided between the installation sleeve (117) and the protective sleeve (101).

6. The novel injection device for laboratory animals according to claim 5, characterized in that: The upper end of the protective sleeve (101) is fixedly connected to an abutment plate (120), and the lower end of the mounting sleeve (117) is fixedly connected to a limiting plate (121), which is used to limit the protective sleeve (101).

7. The novel injection device for laboratory animals according to claim 6, characterized in that: A screw (122) is rotatably connected to the abutment plate (120). A threaded sleeve (123) is fitted on the screw (122) and threadedly connected to the screw (122). The threaded sleeve (123) passes through the limiting plate (121) and slides in cooperation with the limiting plate (121). The lower end of the threaded sleeve (123) abuts against the abutment plate (120) to limit the protective sleeve (101).

8. The novel injection device for laboratory animals according to claim 1, characterized in that: The lower end of the sliding sleeve (103) is provided with a positioning support (124), and the positioning support (124) has a notch for the baffle plate (106) to pass through.

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