CN219354921U

CN219354921U - Uniform speed injector

Info

Publication number: CN219354921U
Application number: CN202320377887.0U
Authority: CN
Inventors: 龙经
Original assignee: Shandong Weigao Group Medical Polymer Co Ltd
Current assignee: Shandong Weigao Group Medical Polymer Co Ltd
Priority date: 2023-03-03
Filing date: 2023-03-03
Publication date: 2023-07-18
Anticipated expiration: 2033-03-03

Abstract

The utility model belongs to the technical field of syringes, and particularly relates to a uniform-speed syringe, wherein a base and the syringe are arranged in parallel, a motor is positioned at the rear end of the syringe, the motor is arranged on a sliding rail of the base through a motor bracket, the syringe comprises a syringe shell at the front end and a piston in the syringe shell, the piston is arranged at the front end of a hollow cylindrical push rod, a pushing piece is arranged in the push rod and pushes the push rod to drive the piston to reciprocate at a uniform speed in the syringe shell, the uniform-speed syringe further comprises a fixing shell, an opening is arranged at the front end of the fixing shell and allows the front end of the syringe to be exposed out of the fixing shell, and the rear end of the fixing shell is clamped with the motor bracket, so that the non-uniformity of force of a user is avoided, and pain or discomfort of a patient is increased.

Description

Uniform speed injector

Technical Field

The utility model belongs to the technical field of syringes, and particularly relates to a constant-speed syringe.

Background

The injector generally comprises a needle cylinder, a piston and a piston rod, wherein a disc-shaped push cake is arranged at the rear end of the piston rod for facilitating injection and suction. At present, medical injectors of various types in the market are all manual injection, liquid medicine is injected into a human body under the action of a piston rod, and when the piston rod is pushed to move along a needle cylinder body, the injection time and the force are uneven due to different liquid medicine densities and an operation method (uneven speed of manually pushing the piston rod) of a worker in the injection process due to main manual control, so that pain or uncomfortable feeling of a patient is increased.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a uniform-speed injector which has the advantages of simple structure and convenient use and solves the problems in the prior art.

The utility model relates to a uniform-speed injector, which comprises a base, an injector and a motor, wherein the base and the injector are arranged in parallel, the motor is positioned at the rear end of the injector, the motor is arranged on a sliding rail of the base through a motor bracket, the injector comprises an injector shell at the front end and a piston in the injector shell, the piston is arranged at the front end of a hollow cylindrical push rod, a pushing piece is arranged in the push rod and pushes the push rod to drive the piston to reciprocate at a uniform speed in the injector shell, the uniform-speed injector further comprises a fixing shell, the front end of the fixing shell is provided with an opening which allows the front end of the injector to be exposed out of the fixing shell, and the rear end of the fixing shell is clamped with the motor bracket.

The propelling piece comprises a ball screw, the front end of the ball screw penetrates through the cylindrical cavity of the push rod and is connected with the inner wall of the front end of the cavity of the push rod, the inner wall of the cavity in the push rod is fixedly connected with a nut, and the nut is close to the opening of the rear end of the push rod.

The ball screw passes through the center of the nut, the external thread of the ball screw is matched with the internal thread of the nut, and the rotation of the ball screw can drive the nut to do reciprocating linear motion and drive the push rod fixedly connected with the nut to do reciprocating linear motion.

The motor is a motor with positive and negative rotation.

The motor support is of an inverted F shape.

The fixed shell is any one of square, round or oval, the appearance of the fixed shell is simple and is suitable for being held by a user, and more preferably, anti-skid rubber can be added at the hand-held position, so that an anti-skid effect is achieved, and the holding hand feeling is improved.

The motor is connected with the motor through a circuit, and the controller is used for controlling the switch and the positive and negative rotation of the motor. One-key control is convenient for users to operate.

The base is provided with a clamping seat, at least one clamping seat is used for supporting and fixing the injector, and the horizontal plane of the upper end of the clamping seat is positioned at the upper half part of the longitudinal section circle of the push rod.

Compared with the prior art, the utility model has the following beneficial effects: the lower end of the motor support is connected with the sliding rail, the motor can slide back and forth on the sliding rail, the motor is arranged at the middle part of the inverted F-shaped motor support, the front end of the motor support is used for being clamped with the fixed shell, the outer structure is connected into a whole through the motor support, the rotary motion is converted into stable linear motion by utilizing the cooperation of the ball screw and the motor, the clamping seat on the base is used for fixing the injector, the motor is controlled by the controller, the key control is further included, the internal and external structure is simple, the whole device is lighter and is suitable for being held by hand, and the non-uniformity of pushing time and force caused by different liquid medicine density and the operation method (the speed of manually pushing the piston rod) of a worker can be avoided in the injection process, so that pain or uncomfortable feeling of a patient is increased.

Drawings

Fig. 1 is a schematic perspective view of a constant velocity injector (when a fixed housing is not installed) according to embodiment 1 of the present utility model;

fig. 2 is a schematic view showing a perspective view of a rear oblique direction of a constant velocity injector (when a fixed housing is not installed) according to embodiment 1 of the present utility model;

fig. 3 is a schematic perspective view of a fixed housing of a constant velocity injector according to embodiment 1 of the present utility model;

fig. 4 is a schematic left-view structural diagram of a fixed housing of a constant velocity injector according to embodiment 1 of the present utility model;

fig. 5 is a schematic top view of a fixed housing of a constant velocity injector according to embodiment 1 of the present utility model;

FIG. 6 is a schematic cross-sectional view of a constant velocity injector mounting case AA according to embodiment 1 of the present utility model;

fig. 7 is a schematic front view of a constant velocity syringe (when a fixed housing is not installed) according to embodiment 2 of the present utility model.

In the figure: 1. a base; 2. a slide rail; 3. a syringe housing; 4. a push rod; 5. A pushing member; 6. a ball screw; 7. A nut; 8. a motor; 9. a motor bracket; 10. a controller; 11. a clamping groove; 12. a first cross plate; 13. a second cross plate; 14. a third riser; 15. a fixed case; 16. the clamping bulge; 17. a coupling; 18. a clamping seat.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

There are also constant velocity syringes on the market today, but such syringes are generally large, for example 24 cm by 20 cm by 12 cm, with a weight of about 3 kg, and are only suitable for being placed on a table or for being modified by the syringe itself, but are also manually controlled, and the modified constant velocity syringe is more laborious for medical staff when manually pushed.

Specific example 1: referring to fig. 1-6, a uniform speed injector comprises a base 1, an injector and a motor 8, wherein the base 1 and the injector are arranged in parallel, the injector is positioned above the base 1, the motor 8 is positioned at the rear end of the injector, the motor 8 is installed on a sliding rail 2 of the base 1 through a motor bracket 9, the arrangement direction of the sliding rail 2 is parallel to the axial direction of the base 1, the injector comprises a front end injector shell 3 and a piston in the injector shell, the piston is installed at the front end of a hollow cylindrical push rod 4, a pushing piece 5 is arranged in the push rod 4 and pushes the piston to reciprocate at a uniform speed in the injector shell 3, the injector also comprises a fixing shell 15, the front end of the fixing shell 15 is provided with an opening, as shown in fig. 3 and 4, the opening is circular, the front end of the injector is allowed to be exposed out of the fixing shell 15, the injector is prevented from moving forwards, the injector is longitudinally fixed, the rear end of the injector is connected with a motor coupler 17 through the front end of the fixing shell 3 and the motor bracket 9, the two opposite side walls of the fixing shell 15 are connected with the front end of the motor shell 16 through the two fixing shells 16, and the front end walls of the fixing shell 15 are contacted with the front end wall 15 of the fixing shell 15, and the end wall of the fixing shell is contacted with the front end wall 15 through the fixing shell 16. When the fixed shell 15 is installed, the lower ends of the two sides of the fixed shell 15 slide backwards along the upper surface of the base 1 until the rear end of the fixed shell 15 is clamped with the protrusions 16, the protrusions are clamped into the clamping grooves 11 of the motor support 9, the fixed shell 15 is installed, when the fixed shell 15 is installed, the front end wall of the fixed shell 15 is fixed more firmly, the height of the front end wall of the fixed shell 15 can be higher than that of the other two side walls, and the inner surface of the front end wall of the fixed shell 15 is provided with the clamping protrusions 16 which are clamped with the clamping grooves 11 of the front end of the base 1. It will be understood by those skilled in the art that the mounting of the stationary housing 15 can be achieved by simply connecting the stationary housing 15 to the motor bracket 9, even though the lower surface of the end wall of the front end of the stationary housing 15 is in contact with the upper surface of the base 1, which is not the most optimal structure as used in the present embodiment, but there is a risk of the stationary housing 15 falling.

The pushing piece 5 comprises a ball screw 6 and a nut 7, the inner wall of a cavity in the push rod 4 is fixedly connected with the nut 7, the nut 7 is close to the rear end opening of the push rod 4, the ball screw 6 penetrates through the center of the nut 7, enters the cylindrical cavity of the push rod 4, and is connected with the inner wall of the front end of the cavity of the push rod 4.

The external thread of the ball screw 6 is matched with the internal thread of the nut 7, the rotation of the ball screw 6 can drive the nut 7 to do reciprocating rectilinear motion, meanwhile, the push rod 4 fixedly connected with the nut 7 is driven to do reciprocating rectilinear motion, and the push rod 4 drives the piston at the front end of the push rod to do reciprocating rectilinear motion along the inner wall of the syringe housing 3, so that uniform injection or liquid suction is completed.

The motor 8 is a motor with positive and negative rotation.

The motor bracket 9 is of an inverted F shape. The motor support 9 is first diaphragm 12 in the lower extreme diaphragm, be equipped with second diaphragm 13 above first diaphragm 12 in parallel with it, first diaphragm 12 and the one end that second diaphragm 13 is close to the syringe pass through third riser 14 to be connected, first diaphragm 12 of motor support 9 lower extreme is connected (the bolt is shown to be connected with the nut in the drawing), motor support 9 can make a round trip to slide on slide rail 2, motor 8 installs the middle part (second diaphragm 13) at motor support 9 type of falling F, the front end (third riser 14) of motor support 9 is used for with fixed shell 15 joint, connect external structure as a whole through motor support 9.

The fixed shell 15 is any one of square, round or oval, the appearance of the fixed shell 15 is simple and is suitable for being held by a user, and more preferably, anti-skid rubber can be added at the holding position, so that the anti-skid effect is achieved and the holding hand feeling is improved.

The motor 8 is connected with the controller 10 through a circuit, and the controller 10 controls the switching and the forward and reverse rotation of the motor 8. One-key control is convenient for users to operate.

The ball screw 6 and the motor 8 are matched to convert rotary motion into stable linear motion, the motor 8 is controlled by the controller 10, the one-key control is further included, the internal and external structure is simple, the whole device is light and convenient, the device is suitable for being held by hand, and uneven pushing time and force caused by different liquid medicine densities and uneven operation methods (such as uneven speed of manually pushing a piston rod) of staff in the injection process can be avoided, so that pain or uncomfortable feeling of a patient is increased.

Specific example 2: as shown in fig. 7, this embodiment is different from embodiment 1 in that a clamping seat 18 is provided on the base, and at least one position of the clamping seat 18 is used for supporting and fixing the syringe. In this embodiment, the clamping seat 18 is disposed below the position of the push rod 4, and the horizontal plane at the upper end of the clamping seat 18 is located at the upper half part of the longitudinal section circle of the push rod, so as to ensure the firmness of clamping. The setting of cassette 18 is in order to guarantee to be in same horizontal plane when installing the output shaft of motor 8 with the syringe that takes shaft coupling 17 that the connection is good after beginning to connect syringe and shaft coupling 17, easy to assemble, perhaps connect shaft coupling 17 and the output shaft of motor 8 earlier, then connect it with the syringe, also can guarantee that the three is in same horizontal plane, simple to operate.

Specific example 3: the difference between this embodiment and embodiment 1 is that the guide groove matched with the width of the fixing shell 15 is provided on the upper surface of the base, when the fixing shell 15 is installed, the two side end parts of the rear end of the fixing shell 15 are inserted into the guide groove, and slide backward on the base 1 along the guide groove until the rear end of the fixing shell 15 is clamped into the clamping groove of the motor bracket 9 to complete the installation of the fixing shell 15, the lower end of the inner wall of the front end of the fixing shell 15 is provided with the clamping protrusion corresponding to the clamping groove of the front end of the base, and when the installation is completed, the inner wall of the front end of the fixing shell is abutted with the front end of the base.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a uniform velocity syringe, includes base, syringe and motor, its characterized in that: the base with the syringe parallel arrangement, the motor is located the rear end of syringe, the motor pass through the motor support install in the slide rail of base, the syringe include the syringe shell of front end with the piston in the syringe shell, the piston is installed at hollow columniform push rod front end, be equipped with the propulsion in the push rod, promote the push rod drives the piston is in at the uniform velocity reciprocating motion in the syringe shell, still include the fixed shell, the front end of fixed shell is equipped with the opening, allows the front end of syringe exposes the fixed shell, the rear end of fixed shell with motor support joint.

2. A constant velocity injector as claimed in claim 1, wherein: the propelling piece comprises a ball screw, the front end of the ball screw penetrates through the cylindrical cavity of the push rod and is connected with the inner wall of the front end of the cavity of the push rod, the inner wall of the cavity in the push rod is fixedly connected with a nut, and the nut is close to the opening of the rear end of the push rod.

3. A constant velocity injector as claimed in claim 2, wherein: the ball screw passes through the center of the nut, and the external thread of the ball screw is matched with the internal thread of the nut.

4. A constant velocity injector according to claim 3, wherein: the motor is a motor with positive and negative rotation.

5. A constant velocity injector as claimed in claim 4 wherein: the motor support is of an inverted F shape.

6. A constant velocity injector as claimed in claim 5 wherein: the fixed shell is any one of square, round or elliptic.

7. A constant velocity injector as claimed in claim 1, wherein: the motor is connected with the motor through a circuit, and the controller is used for controlling the switch and the positive and negative rotation of the motor.

8. A constant velocity injector according to claim 6 or 7, wherein: the base is provided with a clamping seat, at least one clamping seat is used for supporting and fixing the injector, and the horizontal plane of the upper end of the clamping seat is positioned at the upper half part of the longitudinal section circle of the push rod.