Medical quantitative distributor

Abstract

The utility model discloses a medical quantitative distributor, and belongs to the technical field of medical instruments. The medical quantitative distributor comprises a shell, an adapter installed on the shell, a driving shaft, a gear transmission assembly, a lead screw transmission assembly, a pushing rod and a driving wheel installed on the driving shaft, the driving shaft, the gear transmission assembly, the lead screw transmission assembly and the pushing rod are installed on the shell and connected in sequence, and the driving wheel can drive the driving shaft to rotate clockwise or anticlockwise. The driving shaft drives the pushing rod to move forwards or backwards through the gear transmission assembly and the lead screw transmission assembly, the adapter is used for fixing an injector, and the pushing rod is matched with the adapter and used for pushing the injector. The problems that in the prior art, rack transmission is unstable, and backward moving operation of the pushing rod is inconvenient are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, in particular to a medical quantitative dispenser. Background Art

[0002] A Chinese invention patent with publication number CN105212984B discloses a method and device for treating venous occlusion caused by venous insufficiency. The problem and disadvantage is that the push rod of the push device in the invention patent is pushed forward by hard squeezing between the racks, thereby pushing the syringe forward. This transmission method is unstable and the racks are prone to slippage, resulting in push failure.

[0003] The Chinese invention patent with the announcement number CN219251360U discloses a medical glue pushing device, which has the problem and disadvantage that the reverse conveying of the pushing device in the invention requires the disassembly of related parts, which is inconvenient to operate. Utility Model Content

[0004] Purpose of the utility model: to provide a medical quantitative dispenser, which improves the working stability of the medical quantitative dispenser and the convenience of moving the push rod backward, and solves the problems of unstable rack transmission and inconvenient operation of moving the push rod backward in the prior art.

[0005] The technical solution of the utility model is: a medical quantitative dispenser comprises: a shell, a adapter installed on the shell, a driving shaft, a gear transmission assembly, a screw transmission assembly and a push rod installed on the shell and connected in sequence, and a driving wheel installed on the driving shaft.

[0006] The driving wheel can drive the driving shaft to rotate clockwise or counterclockwise, so that the driving shaft drives the pushing rod to move forward or backward through the gear transmission assembly and the lead screw transmission assembly.

[0007] The adapter is used to fix the syringe, and the pushing rod cooperates with the adapter and is used to push the syringe.

[0008] In a further embodiment, the medical quantitative dispenser further comprises: a connecting piece, a rotating end plate, an angle control plate, a compression spring and a steel ball.

[0009] One end of the connecting piece is connected to the driving shaft, and the other end passes through the angle control plate and is connected to the rotating end plate.

[0010] The angle control plate is connected to the shell, an end of the angle control plate close to the rotating end plate is provided with a receiving cavity, and an inner wall of the angle control plate is provided with an angle control slot.

[0011] The rotating end plate is arranged in the angle control plate, and the rotating end plate is provided with a rotating slot, and the rotating slot matches with the angle control slot.

[0012] The compression spring and the steel ball are arranged in the rotating slot, and the compression spring is used to apply a force on the steel ball toward the inner wall of the angle control plate.

[0013] When the driving wheel drives the driving shaft to rotate, the driving shaft drives the rotating end plate, the compression spring and the steel ball to rotate through the connecting piece.

[0014] In a further embodiment, the inner wall of the angle control plate is provided with a plurality of angle control slots, and the plurality of angle control slots are evenly distributed around the circumference.

[0015] In a further embodiment, an eccentric protrusion is provided at one end of the connecting member, and the eccentric protrusion is plug-fitted with the rotating end plate.

[0016] In a further embodiment, the medical quantitative dispenser further comprises: a left end bearing seat and a right end bearing seat mounted on the shell, and the driving shaft is mounted on the left end bearing seat and the right end bearing seat.

[0017] In a further embodiment, the gear transmission assembly includes: a driving gear, a driven gear and a driven shaft connected in sequence.

[0018] The driving gear is installed on the driving shaft, and the driven shaft is connected to the screw transmission assembly.

[0019] In a further embodiment, the screw drive assembly includes: a front end bearing seat, a screw rod and a nut connected in sequence.

[0020] The front end bearing seat is connected to the housing and is used to fix the screw rod.

[0021] The screw rod is connected with the gear transmission assembly.

[0022] The pushing rod is connected with the nut.

[0023] In a further embodiment, the outer wall of the driving wheel is provided with a plurality of gear teeth.

[0024] In a further embodiment, the adapter is threadedly engaged with the housing.

[0025] The beneficial effects of the utility model are as follows: the application drives the push rod to push the syringe through the cooperation of the driving wheel, the active shaft, the gear transmission assembly and the screw transmission assembly, which can utilize the stability of the gear meshing transmission and the spiral transmission of the screw rod, thereby improving the working stability of the medical quantitative dispenser and solving the problem of unstable rack transmission in the prior art.

[0026] The driving wheel drives the driving shaft to rotate clockwise or counterclockwise, so that the push rod can be moved forward or backward without disassembling parts, which improves the convenience of moving the push rod backward and solves the problem of inconvenient operation of moving the push rod backward in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall internal structure of an embodiment of the utility model in which the upper shell is hidden.

[0028] Figure 2 It is a partial structural schematic diagram of the angle control plate, compression spring and steel ball of the utility model.

[0029] Figure 3 It is a schematic structural diagram of the cooperation of the driving wheel, the driving shaft and the gear transmission assembly of the utility model.

[0030] Figure 4 It is a structural schematic diagram of the cooperation between the gear transmission assembly and the lead screw transmission assembly of the utility model.

[0031] Figure 5 The utility model is a schematic diagram of the structure of the driving shaft, the connecting piece, the rotating end plate, the compression spring and the steel ball.

[0032] Figure 6 It is a schematic diagram from another angle showing the cooperation among the driving shaft, the connecting piece and the rotating end plate of the utility model.

[0033] Figure 7 It is a structural schematic diagram of the angle control plate of the utility model.

[0034] Figure 8 The utility model is a schematic diagram of the internal structure of the medical quantitative distributor and the syringe.

[0035] Fig. 9 It is a schematic diagram of the structure of the adapter, the upper shell and the lower shell of the utility model.

[0036] The reference numerals shown in the figure are: adapter 1, upper shell 2, lower shell 3, driving wheel 4, driving gear 5, driving shaft 6, right end bearing seat 7, left end bearing seat 8, driven gear 9, driven shaft 10, screw fixing pin 11, screw 12, nut 13, push rod 14, front end bearing seat 15, rotating end plate 16, angle control plate 17, end plate fixing pin 18, control plate fixing pin 19, connecting piece 20, compression spring 21, steel ball 22, gear teeth 401, rotating slot 1601, angle control slot 1701, control plate inner wall 1702. DETAILED DESCRIPTION

[0037] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0038] The utility model discloses a medical quantitative dispenser, which improves the working stability of the medical quantitative dispenser and the convenience of operation of the push rod moving backward, and solves the problems of unstable rack transmission and inconvenient operation of the push rod moving backward in the prior art.

[0039] like Figure 1-9 The medical quantitative dispenser shown includes: a housing, an adapter 1 installed on the housing, a driving shaft 6, a gear transmission assembly, a screw transmission assembly and a push rod 14 installed on the housing and connected in sequence, and a driving wheel 4 installed on the driving shaft 6.

[0040] The driving wheel 4 can drive the driving shaft 6 to rotate clockwise or counterclockwise, so that the driving shaft 6 drives the push rod 14 to move forward or backward through the gear transmission assembly and the screw transmission assembly.

[0041] The adapter 1 is used to fix the syringe, and the push rod 14 cooperates with the adapter 1 and is used to push the syringe.

[0042] like Figure 1-3 The outer wall of the driving wheel 4 is shown to be provided with a plurality of gear teeth 401 .

[0043] like Figure 8 The adapter 1 is shown to be threadedly engaged with the housing.

[0044] like Fig. 9 The housing shown includes an upper shell 2 and a lower shell 3 .

[0045] like Figure 1 and 3 The medical quantitative dispenser shown also includes: a left end bearing seat 8 and a right end bearing seat 7 installed on the shell, a driving shaft 6 installed on the left end bearing seat 8 and the right end bearing seat 7, and the driving shaft 6 is installed on the shell through the left end bearing seat 8 and the right end bearing seat 7.

[0046] Regarding gear transmission components, such as Figure 1 , 3 The gear transmission assembly shown in FIG. 4 comprises: a driving gear 5, a driven gear 9 and a driven shaft 10 which are connected in sequence.

[0047] The driving gear 5 is mounted on the driving shaft 6, and the driven shaft 10 is connected to the screw transmission assembly. Figure 1 and 4The screw rod 12 is connected to the driven shaft 10 via a screw rod fixing pin 11 .

[0048] Regarding the screw drive components, such as Figure 1 and 4 The screw transmission assembly shown includes: a front end bearing seat 15, a screw rod 12 and a nut 13 connected in sequence.

[0049] The front end bearing seat 15 is connected to the housing and is used to fix the screw rod 12 .

[0050] The screw rod 12 is connected to the gear transmission assembly.

[0051] The push rod 14 is connected to the nut 13 .

[0052] In a further embodiment, Figure 1 , 2 The medical quantitative dispenser shown in 5-7 also includes: a connecting piece 20, a rotating end plate 16, an angle control plate 17, a compression spring 21 and a steel ball 22.

[0053] One end of the connecting member 20 is connected to the driving shaft 6 , and the other end passes through the angle control plate 17 and is connected to the rotating end plate 16 .

[0054] The angle control plate 17 is connected to the housing. An end of the angle control plate 17 close to the rotating end plate 16 is provided with a receiving cavity. An inner wall of the angle control plate 17 is provided with an angle control slot 1701 .

[0055] The rotating end plate 16 is disposed in the angle control plate 17 . The rotating end plate 16 is provided with a rotating slot 1601 . The rotating slot 1601 matches with the angle control slot 1701 .

[0056] like Figure 5 The compression spring 21 and the steel ball 22 are arranged in the rotation slot 1601 , and the compression spring 21 is used to apply a force to the steel ball 22 toward the inner wall 1702 of the angle control plate.

[0057] When the driving wheel 4 drives the driving shaft 6 to rotate, the driving shaft 6 drives the rotating end plate 16, the compression spring 21 and the steel ball 22 to rotate through the connecting member 20.

[0058] like Figure 2 The angle control plate 17 shown is connected to the housing through the control plate fixing pin 19

[0059] By rotating the end plate 16, the compression spring 21 and the steel ball 22 and cooperating with the angle control slot 1701 of the angle control plate 17, the steel ball 22 is located in the rotating slot 1601 and connected to the inner wall of the angle control plate 17. The driving angle and number can be fed back to the user through the squeezing of the steel ball 22 and the compression spring 21 by the inner wall 1702 of the angle control plate and the sound of collision when the steel ball 22 bounces into the angle control slot 1701.

[0060] like Figure 2 and 7 The inner wall of the angle control plate 17 shown is provided with a plurality of angle control slots 1701, and the plurality of angle control slots 1701 are evenly distributed around the circumference. Since the angle of the evenly distributed arrangement is fixed, the rotation angle can be known based on the number of rotations each time the steel ball 22 rotates to the position of the angle control slot 1701. The more the number of angle control slots 1701 is, the more accurate the feedback driving angle is.

[0061] like Figure 6 An eccentric protrusion is provided at one end of the connecting member 20 , and the eccentric protrusion is plug-fitted with the rotating end plate 16 .

[0062] In this embodiment, one end of the connecting member 20 is interference-fitted or adhesively-fitted with the rotating end plate 16 , and the other end thereof is threadedly or pin-fitted with the driving shaft 6 .

[0063] like Figure 2 As shown, the rotating end plate 16 and the connecting member 20 can also be connected via an end plate fixing pin 18 .

[0064] The eccentric protrusion can ensure the synchronization of the rotation of the connecting member 20 and the rotating end plate 16 .

[0065] Working principle: first install the adapter 1 on the housing, then install the syringe on the adapter 1, and then rotate the driving wheel 4 clockwise or counterclockwise, so that the driving wheel 4 drives the active shaft 6 to rotate clockwise or counterclockwise, so that the active shaft 6 drives the push rod 14 to move forward or backward through the gear transmission assembly and the screw transmission assembly, and when the push rod 14 moves forward, the push rod 14 pushes the syringe.

[0066] During the process of rotating the driving wheel 4 , when the driving shaft 6 drives the rotating end plate 16 to rotate synchronously through the connecting member 20 , after the rotating end plate 16 rotates, the rotating slot 1601 forces the compression spring 21 and the steel ball 22 to rotate together.

[0067] l rotation makes that when the steel ball 22 is between two adjacent angle control slots 1701 of the angle control plate 17, the steel ball 22 is squeezed by the inner wall 1702 of the angle control plate, thereby squeezing the compression spring 21, causing it to produce a certain deformation. At this time, the "load" in the distributor system is larger than when the steel ball 22 is not squeezed, and a larger driving force is required to drive the driving wheel 4 to drive the distributor system.

[0068] However, the rotation makes the steel ball 22 no longer squeezed by the inner wall 1702 of the angle control plate when it is in the angle control slot 1701, thereby compressing the spring 21 to release the deformation. At this time, the "load" in the distributor system is smaller than when the steel ball 22 is squeezed, and a smaller driving force is required to drive the driving wheel 4 to drive the distributor system.

[0069] By the magnitude of the driving force, the user of the dispenser can know the number of driving times, that is, one driving is from the first small driving force to the second small driving force, or from the first large driving force to the second large driving force.

[0070] At the same time, when the steel ball 22 is rotated to the angle control slot 1701, the squeezing force of the inner wall 1702 of the angle control plate on the steel ball 22 disappears instantly, the compression spring 21 releases its elasticity instantly, and the steel ball 22 is instantly bounced into the angle control slot 1701. The steel ball 22 collides with the inner wall of the angle control slot 1701 and makes a sound. Through the sound, the user of the dispenser can also know the number of times it has been driven.

[0071] The transmission ratio of the gear transmission mechanism and the lead of the screw 12 of the screw transmission mechanism can be adjusted as needed, thereby adjusting the moving distance of the push rod 14 each time the driving wheel 4 rotates.

[0072] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. A medical quantitative dispenser, characterized in that: include: A housing, an adapter installed on the housing, a driving shaft, a gear transmission assembly, a screw transmission assembly and a push rod installed on the housing and connected in sequence, and a driving wheel installed on the driving shaft; The driving wheel can drive the driving shaft to rotate clockwise or counterclockwise, so that the driving shaft drives the push rod to move forward or backward through the gear transmission assembly and the lead screw transmission assembly; The adapter is used to fix the syringe, and the pushing rod cooperates with the adapter and is used to push the syringe.

2. A medical quantitative dispenser according to claim 1, characterized in that: Also includes: Connectors, rotating end plates, angle control plates, compression springs and steel balls; One end of the connecting piece is connected to the driving shaft, and the other end passes through the angle control plate and is connected to the rotating end plate; The angle control plate is connected to the housing, an end of the angle control plate close to the rotating end plate is provided with a receiving cavity, and an inner wall of the angle control plate is provided with an angle control slot; The rotating end plate is arranged in the angle control plate, and the rotating end plate is provided with a rotating slot, and the rotating slot matches with the angle control slot; The compression spring and the steel ball are arranged in the rotating slot, and the compression spring is used to apply a force on the steel ball toward the inner wall of the angle control plate; When the driving wheel drives the driving shaft to rotate, the driving shaft drives the rotating end plate, the compression spring and the steel ball to rotate through the connecting piece.

3. A medical quantitative dispenser according to claim 2, characterized in that: The inner wall of the angle control plate is provided with a plurality of angle control slots, and the plurality of angle control slots are evenly distributed around the circumference.

4. A medical quantitative dispenser according to claim 2, characterized in that: An eccentric protrusion is provided at one end of the connecting piece, and the eccentric protrusion is plug-fitted with the rotating end plate.

5. A medical quantitative dispenser according to claim 1, characterized in that: Also includes: The driving shaft is installed on the left and right bearing seats of the housing, and the driving shaft is installed on the left and right bearing seats.

6. A medical quantitative dispenser according to claim 1, characterized in that: The gear transmission assembly comprises: a driving gear, a driven gear and a driven shaft connected in sequence; The driving gear is installed on the driving shaft, and the driven shaft is connected to the screw transmission assembly.

7. A medical quantitative dispenser according to claim 1, characterized in that: The screw transmission assembly comprises: a front end bearing seat, a screw rod and a nut connected in sequence; The front end bearing seat is connected to the housing and is used to fix the screw rod; The screw rod is connected to the gear transmission assembly; The pushing rod is connected with the nut.

8. A medical quantitative dispenser according to claim 1, characterized in that: The outer wall of the driving wheel is provided with a plurality of gear teeth.

9. A medical quantitative dispenser according to claim 1, characterized in that: The adapter is threadedly matched with the housing.

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