Charging device and pusher

Abstract

The present invention provides a pressurizing device and a pusher thereof, the pusher comprising: a bracket having a vertical cavity and a horizontal cavity in communication; a reset mechanism having a pressing slider and a reset rod, one end of the reset rod being horizontally elastically connected to the pressing slider, the pressing slider being horizontally movable within the horizontal cavity; a locking slider abutting the upper end of the pressing slider, the locking slider being movable up and down within the vertical cavity according to the horizontal movement of the pressing slider; a pressing handle being insertable into the vertical cavity, the lower end of the pressing handle being formed with a pressing inclined surface abutting the reset inclined surface on the pressing slider; and a push-pull rod being horizontally movable above the locking slider, a locking structure being provided between the push-pull rod and the locking slider. The present invention has a simple structure, requires few parts, and can complete self-locking and pressure relief operations with a single hand.

Description

[0001] This application is a divisional application. The application number of the original application is 201710062649.X, the application date is January 24, 2017, and the name of the invention is “Charging device and pusher thereof”. Technical Field

[0002] The present invention relates to a charging device and a pusher, and in particular to a charging device and a pusher used for expanding a medical balloon catheter in percutaneous coronary angioplasty in the field of medical equipment. Background Art

[0003] Interventional technology is a minimally invasive treatment technology that uses modern high-tech means. Under the guidance of medical imaging equipment, special catheters, guide wires and other precision instruments are introduced into the human body to diagnose and locally treat lesions in the body.

[0004] Percutaneous transluminal coronary angioplasty is a procedure in which a balloon catheter is delivered to the site of coronary artery stenosis through femoral artery puncture, and the balloon catheter is pressurized to expand the inner diameter of the blood vessel and improve myocardial blood supply.

[0005] At present, the charging device for charging balloon catheters has many parts, complex assembly, and high quality requirements for individual parts. This will result in high production costs, great production difficulty, and high quality control requirements.

[0006] Therefore, it is necessary to provide a new charging device to overcome the above-mentioned defects. Summary of the Invention

[0007] The object of the present invention is to provide a pusher for a charging device, which has a simple structure, a small number of parts, and can realize the self-locking and unlocking operations of a push-pull rod by single-hand operation.

[0008] Another object of the present invention is to provide a charging device with a simple structure, few parts, and the ability to perform self-locking and pressure relief operations with just one hand.

[0009] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0010] The present invention provides a pusher for a charging device, the pusher comprising:

[0011] A bracket having a vertical cavity and a horizontal cavity connected to each other;

[0012] A reset mechanism comprises a pressing slider and a reset rod, one end of the reset rod being horizontally elastically connected to the pressing slider, and the pressing slider being horizontally movable in the horizontal cavity;

[0013] a locking slider abutting against the upper end of the pressing slider, the locking slider being disposed in the vertical cavity so as to be movable up and down according to the horizontal movement of the pressing slider;

[0014] A pressing handle can be inserted into the vertical cavity, and a pressing inclined surface is formed at the lower end of the pressing handle, and the pressing inclined surface abuts against the reset inclined surface on the pressing slider;

[0015] A push-pull rod is horizontally movable and is arranged above the locking slider. A locking structure is provided between the push-pull rod and the locking slider.

[0016] In an embodiment of the present invention, the locking structure includes a snap groove and a snap block that snap into each other, the snap groove is recessed on the upper surface of the locking slider, and a plurality of the snap blocks are spaced apart at the lower part of the push-pull rod along the direction of its horizontal movement; or the snap block is protruding from the upper surface of the locking slider, and a plurality of the snap grooves are recessed at the lower part of the push-pull rod along the direction of its horizontal movement.

[0017] In an embodiment of the present invention, the locking structure includes an internal thread groove provided on the upper portion of the locking slider and an external thread rod threadedly connected to the internal thread groove, and the external thread rod is provided on the push-pull rod.

[0018] In an embodiment of the present invention, the external threaded rod has a trapezoidal thread tooth that prevents the push-pull rod from retreating from the internal thread groove, and the length of the retreat side of the trapezoidal thread tooth is smaller than the length of the feed side of the trapezoidal thread tooth.

[0019] In an embodiment of the present invention, a horizontal connecting hole is provided in the pressing slider of the reset mechanism, a protrusion is provided in the horizontal connecting hole, and a sliding groove is provided on the reset rod; an abutment ring is provided at one end of the reset rod, and a spring is clamped between the abutment ring and the bracket, and the spring is sleeved on the reset rod, and the protrusion can be horizontally elastically set in the sliding groove through the spring.

[0020] In an embodiment of the present invention, the other end of the reset rod is provided with a conversion opening groove connected to the sliding groove, the conversion opening groove is arranged parallel to the sliding groove, and the protrusion is inserted into the sliding groove through the conversion opening groove.

[0021] In an embodiment of the present invention, a guide rib is protruded from the reset rod, and a guide groove matching the guide rib is provided in the connecting hole.

[0022] In an embodiment of the present invention, an upper stepped slope is provided on the upper surface of the pressing slider, and a lower stepped slope is provided on the lower surface of the locking slider, wherein the upper stepped slope matches the lower stepped slope.

[0023] In an embodiment of the present invention, the upper step inclined surface is formed on an upper step protrusion protruding from the upper surface of the pressing slider, and a guide groove is provided on the upper step protrusion. The lower step inclined surface is formed on a lower step protrusion protruding from the lower surface of the locking slider, and a guide block is provided on the lower step protrusion. The guide block can be slidably arranged in the guide groove.

[0024] In an embodiment of the present invention, the pressing handle has two symmetrically arranged inserting plates, the lower ends of the inserting plates are formed with the pressing inclined surfaces, and two symmetrically arranged resetting inclined surfaces are provided on both sides of the pressing slider.

[0025] In an embodiment of the present invention, two vertical grooves connected to the vertical cavity are symmetrically provided on both sides of the bracket, and two vertical limit blocks are symmetrically provided on both sides of the locking slider. The vertical limit blocks can be slid up and down in the vertical grooves.

[0026] In an embodiment of the present invention, a horizontal groove communicating with the horizontal cavity is provided on the bottom wall of the bracket, and a horizontal limit block is provided on the bottom of the pressing slider. The horizontal limit block can be horizontally moved into the horizontal groove.

[0027] The present invention further provides a charging device, which includes the pusher as described above, and further includes:

[0028] The housing has a connected charging chamber and a pushing chamber, the pusher is arranged in the pushing chamber, one end of the push-pull rod extends into the charging chamber, and the other end of the push-pull rod is provided with a gripping handle;

[0029] A locking joint is connected to one end of the shell through a connecting pipe, and the connecting pipe is communicated with the pressure charging chamber of the shell.

[0030] In an embodiment of the present invention, a pressure gauge is provided on the housing, and the pressure gauge is communicated with the pressure charging chamber.

[0031] In an embodiment of the present invention, one end of the push-pull rod extending into the pressure chamber is connected to a sealing rubber plug, and the sealing rubber plug is in sealing sliding contact with the inner wall of the shell.

[0032] The characteristics and advantages of the charging device and the pusher thereof of the present invention are: the present invention has a simple structure and few parts, and the locking and unlocking operations of the push-pull rod can be achieved under the condition of single-handed operation. The pusher and the charging device with the pusher improve the convenience of the operator and make the operation more flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the assembly of the pressing handle, the locking slider and the pressing slider of the present invention.

[0035] Figure 2 This is a schematic cross-sectional view of the structure of the charging device of the present invention in which no push-pull rod is provided in the pusher.

[0036] Figure 3 Schematic diagram of the structure of the locking structure of the present invention.

[0037] Figure 4 It is a structural diagram of the second embodiment of the locking structure of the present invention.

[0038] Figure 5 It is a schematic three-dimensional structural diagram of the third embodiment of the locking structure of the present invention.

[0039] Figure 6 It is a cross-sectional schematic diagram of the cooperation between the external thread rod and the internal thread groove in the locking structure of the third embodiment of the present invention.

[0040] Figure 7 It is a three-dimensional diagram of the pressing slider of the present invention.

[0041] Figure 8 It is a side view of the pressing slider of the present invention.

[0042] Figure 9 This is a top cross-sectional view of the cooperation between the pressing slider and the reset rod of the present invention.

[0043] Figure 10 This is a three-dimensional diagram of the cooperation between the pressing slider and the reset rod of the present invention.

[0044] Figure 11 It is a bottom perspective view of the locking slider of the present invention.

[0045] Figure 12 It is a structural schematic diagram of the shell of the charging device of the present invention. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] Implementation Method 1

[0048] like Figure 1 、 Figure 2 and Figure 12 As shown, the present invention provides a pusher for a charging device, which includes a bracket 1, a reset mechanism 2, a locking slider 3, a pressing handle 4 and a push-pull rod 5, wherein: the bracket 1 has a vertical cavity 11 and a horizontal cavity 12 that are connected to each other; the reset mechanism 2 has a pressing slider 21 and a reset rod 22, one end of the reset rod 22 can be horizontally elastically connected to the pressing slider 21, and the pressing slider 21 can be horizontally movably arranged in the horizontal cavity 12; the locking slider 3 abuts against the upper end of the pressing slider 21, and the locking slider 3 can be moved up and down in the vertical cavity 11 according to the horizontal movement of the pressing slider 21; the pressing handle 4 can be inserted into the vertical cavity 11, and the lower end of the pressing handle 4 is formed with a pressing inclined surface 41, and the pressing inclined surface 41 abuts against the reset inclined surface 211 on the pressing slider 21; the push-pull rod 5 can be horizontally movably arranged above the locking slider 3, and a locking structure 6 is provided between the push-pull rod 5 and the locking slider 3. The pusher of the charging device of the present invention, when the locking slider 3 and the push-pull rod 5 are in the locked state, the pressing handle 4 is manually pressed down, so that the pressing inclined surface 41 at the lower end of the pressing handle 4 abuts against the reset inclined surface 211 of the pressing slider 21, thereby causing the pressing slider 21 to move horizontally in the horizontal cavity 12 of the bracket 1. As the pressing slider 21 moves horizontally, the locking slider 3 in the vertical cavity 11 is no longer supported by the pressing slider 21 and moves downward. At this time, the locking structure 6 between the upper end of the locking slider 3 and the push-pull rod 5 is released. Except for locking, the push-pull rod 5 can move horizontally. When the push-pull rod 5 needs to be locked, the downward pressure on the pressing handle 4 is canceled. At this time, the pressing slider 21 slides to the initial position in the horizontal cavity 12 under the elastic recovery tension of the reset rod 22. Due to the return of the pressing slider 21, the locking slider 3 is pushed up in the vertical cavity 11 by the pressing slider 21. The locking slider 3 is locked with the push-pull rod 5 through the locking structure 6. At this time, the push-pull rod 5 is fixed on the locking slider 3. The pusher of the charging device of the present invention has a simple structure and few parts. It can realize the locking and unlocking operations of the push-pull rod 5 under the condition of single-handed operation. The pusher improves the convenience of the operator and makes the operation more flexible and convenient.

[0049] Specifically, Figure 2 and Figure 10 As shown, the bracket 1 is generally in the shape of a rectangular shell, having a vertical cavity 11 and a horizontal cavity 12 connected to each other. The lower end of the vertical cavity 11 forms a structure that communicates with one end of the horizontal cavity 12. The end of the horizontal cavity 12 that communicates with the lower end of the vertical cavity 11 is the initial position of the pressing slider 21, at which time the locking slider 3 is exactly locked with the push-pull rod 5. The upper end of the bracket 1 is provided with an upper opening 111 that communicates with the vertical cavity 11, and the locking slider 3 can be inserted into the vertical cavity 11 through this upper opening 111. One side of the bracket 1 is provided with an opening 13 for the reset rod 22 to pass through. The opening 13 is connected to one end of the horizontal cavity 12. The other side of the bracket 1 is provided with an opening 121 that communicates with the other end of the horizontal cavity 12, and the pressing slider 21 can be inserted into the horizontal cavity 12 through this opening 121. In addition, in this embodiment, the upper end of the bracket 1 is also provided with a horizontal connecting hole 16 connected to the vertical cavity 11. The horizontal connecting hole 16 is arranged parallel to the horizontal movement direction of the pressing slider 21, which can facilitate the insertion and sliding of the push-pull rod 5 and can be used to limit the position of the push-pull rod 5 in the vertical direction.

[0050] In one embodiment of the present invention, the locking structure 6 includes a buckle groove 61 and a buckle block 62 that buckle with each other. For example, in a specific embodiment, Figure 3 As shown, the upper surface of the locking slider 3 is concavely provided with a buckle groove 61, and the lower part of the push-pull rod 5 is provided with a plurality of buckle blocks 62 at intervals along the direction of its horizontal movement. When one of the buckle blocks 62 on the push-pull rod 5 is inserted into the buckle groove 61 of the locking slider 3, the locking slider 3 and the push-pull rod 5 can be locked, thereby realizing the control of the horizontal movement position of the push-pull rod 5; in another specific embodiment, as shown in FIG. Figure 4 As shown, a snap block 62 is convexly provided on the upper surface of the locking slider 3, and a plurality of snap grooves 61 are concavely provided at intervals along the direction of its horizontal movement on the lower part of the push-pull rod 5. When the snap block 62 of the locking slider 3 is embedded in one of the snap grooves 61 on the push-pull rod 5, the locking slider 3 and the push-pull rod 5 can be locked, thereby realizing the control of the horizontal movement position of the push-pull rod 5.

[0051] In another embodiment of the present invention, Figure 1 and Figure 5 As shown, the locking structure 6 includes an internal thread groove 31 provided on the upper portion of the locking slider 3 and an external threaded rod 51 threadedly connected to the internal thread groove 31. The external threaded rod 51 is provided on the push-pull rod 5. Through the threaded engagement structure, the locking slider 3 and the push-pull rod 5 are locked, thereby realizing control of the horizontal movement position of the push-pull rod 5.

[0052] Specifically, in this embodiment, the external thread rod 51 has a trapezoidal thread 511 that prevents the push-pull rod 5 from retreating out of the internal thread groove 31 of the locking slider 3. Figure 6 As shown, the length of the retreat side 5111 of the trapezoidal thread 511 is less than the length of the feed side 5112 of the trapezoidal thread 511, that is, Figure 6 From the perspective of the position in the middle, the direction in which the external threaded rod 51 moves to the left relative to the locking slider 3 is the feed direction, and the direction in which the external threaded rod 51 moves to the right relative to the locking slider 3 is the retraction direction. Therefore, the side of the trapezoidal thread 511 located on the feed direction side is the feed side 5112, and the side of the trapezoidal thread 511 located on the retraction direction side is the retraction side 5111. The present invention sets the thread of the external threaded rod 51 as a trapezoidal thread 511, and makes the length of the retraction side 5111 of the trapezoidal thread 511 shorter than the length of the feed side 5112 of the trapezoidal thread 511. This can make the locking between the internal thread groove 31 of the locking slider 3 and the external threaded rod 51 of the push-pull rod 5 more reliable when they are in the locked state, preventing the push-pull rod 5 from falling out of the internal thread groove 31 when subjected to external force in the retraction direction, thereby preventing locking failure.

[0053] In one embodiment of the present invention, Figure 2 、 Figure 7 and Figure 8 As shown, a horizontal connecting hole 212 is provided in the pressing slider 21 of the reset mechanism 2. The horizontal connecting hole 212 is parallel to the direction in which the pressing slider 21 moves horizontally in the horizontal cavity 12 of the bracket 1. A protrusion 2121 is radially provided in the horizontal connecting hole 212, and a sliding groove 221 is provided on the reset rod 22. An abutting ring 222 is provided at one end of the reset rod 22. The abutting ring 222 penetrates into the horizontal cavity 12 from the opening 13 of the bracket 1. A spring 223 is sandwiched between the abutting ring 222 and the outer wall of the bracket 1. The spring 223 is sleeved on the reset rod 22. The protrusion 2121 can be horizontally and elastically set in the sliding groove 221 through the spring 223. Figure 9As shown, the other end of the reset rod 22 is provided with a conversion opening slot 224 that communicates with the sliding slot 221. The conversion opening slot 224 is arranged parallel to the sliding slot 221. When the reset rod 22 is inserted into the horizontal connection hole 212, the protrusion 2121 first passes through the conversion opening slot 224 to the end of the conversion opening slot 224 that communicates with the sliding slot 221. At this time, the reset rod 22 is rotated, and the protrusion 2121 slides from the conversion opening slot 224 into the sliding slot 221. As the reset rod 22 moves horizontally, the protrusion 2121 can slide within the sliding slot 221. By providing the reset rod 22 with a conversion opening slot 224 that communicates with the sliding slot 221, the present invention not only facilitates the engagement of the protrusion 2121 with the sliding slot 221, but also prevents the reset rod 22 from falling out of the pressing slider 21 when sliding horizontally within the horizontal connection hole 212.

[0054] In a specific embodiment, please refer to Figure 8 As shown, two protrusions 2121 are provided in the horizontal connection hole 212 of the pressing slider 21 in a radially opposite manner; Figure 2 and Figure 9 As shown, the other end of the reset rod 22 is provided with two radially opposite sliding grooves 221 and two conversion opening grooves 224 connected to the corresponding sliding grooves 221. The present invention can make the reset rod 22 more firmly connected to the pressing slider 21 by the sliding structure of the two sets of symmetrically arranged protrusions 2121 and the sliding grooves 221.

[0055] Further, such as Figure 8 and Figure 10 As shown, the reset lever 22 is provided with a protruding guide rib 225, and the horizontal connection hole 212 of the pressing slider 21 is provided with a guide groove 2122 that mates with the guide rib 225. In this embodiment, two diametrically opposed guide ribs 225 are provided on the reset lever 22, and two diametrically opposed guide grooves 2122 are also provided in the horizontal connection hole 212 of the pressing slider 21. The two guide ribs 225 on the reset lever 22 are interlaced with the two sliding grooves 221. The provision of the guide ribs 225 on the reset lever 22 of the present invention allows the reset lever 22 to more smoothly align with the horizontal connection hole 212 of the pressing slider 21.

[0056] In one embodiment of the present invention, Figure 1 、 Figure 7 and Figure 11As shown, the upper surface of the pressing slider 21 is provided with an upper stepped inclined surface 213, and the lower surface of the locking slider 3 is provided with a lower stepped inclined surface 32, and the upper stepped inclined surface 213 cooperates with the lower stepped inclined surface 32. When the pressing slider 21 moves within the horizontal cavity 12 of the bracket 1, the upper stepped inclined surface 213 of the pressing slider 21 presses against the lower stepped inclined surface 32 of the locking slider 3, thereby easily lifting the locking slider 3 from the vertical cavity 11 of the bracket 1 from the bottom to the top. At the same time, when the pressing slider 21 moves from the initial position of the horizontal cavity 12 to the position of the opening 121, the inclined surfaces between the upper stepped inclined surface 213 and the lower stepped inclined surface 32 cooperate, making it easier for the locking slider 3 to fall from the vertical cavity 11 from the top to the bottom.

[0057] In one embodiment, the upper stepped inclined surface 213 is formed on an upper stepped protrusion 214 protruding from the upper surface of the pressing slider 21. A guide groove 215 is provided in the middle of the upper stepped protrusion 214. The lower stepped inclined surface 32 is formed on a lower stepped protrusion 33 protruding from the lower surface of the locking slider 3. A guide block 331 is provided on the lower stepped protrusion 33. The guide block 331 is slidably disposed within the guide groove 215. The alignment of the guide block 331 with the guide groove 215 allows for a more compact fit between the pressing slider 21 and the locking slider 3, with a higher degree of fit precision.

[0058] In one embodiment of the present invention, Figure 1 As shown, the pressing handle 4 has two symmetrically arranged insertion plates 42, and an arc-shaped pressing plate 43 is connected between the upper ends of the two insertion plates 42. The lower end of the insertion plate 42 is formed with the pressing inclined surface 41, and the two sides of the pressing slider 21 are symmetrically provided with two reset inclined surfaces 211. By pressing down the arc-shaped pressing plate 43 of the pressing handle 4, the two insertion plates 42 move downward in the vertical cavity 11, so that the two pressing inclined surfaces 41 are respectively aligned with the two reset inclined surfaces 211 of the pressing slider 21, and the pressing handle 4 is continued to be pressed down. Under the downward force of the pressing inclined surface 41 on the reset inclined surface 211, the pressing slider 21 moves from one end of the horizontal cavity 12 to the other end of the horizontal cavity 12, and the locking slider 3 falls, releasing the locking relationship with the push-pull rod 5, and the push-pull rod 5 can move freely horizontally; the above-mentioned pusher is installed in the shell 10 of the charging device, and one end of the reset rod 22 of the pusher is against the inner wall of the shell 10. At this time, since the end of the reset rod 22 is against the inner wall of the shell 10, the spring 223 on the reset rod 22 is stretched when the pressing slider 21 moves horizontally. When the downward pressure on the pressing handle 4 is released, the pressing slider 21 is pulled back to one end of the horizontal cavity 12 under the elastic restoring force of the spring 223 on the reset rod 22. Due to the return of the pressing slider 21, the locking slider 3 is pushed up in the vertical cavity 11 by the upper stepped inclined surface 213 of the pressing slider 21 until it forms a locking relationship with the push-pull rod 5. In the present invention, refer to Figure 1 、 Figure 2 and Figure 5 As shown, the two insertion plates 42 of the pressing handle 4 are respectively inserted into the vertical cavity 11 from two through holes arranged on both sides of the locking slider 3; further, limiting protrusions 421 are also provided on both sides of the insertion plate 42, and the limiting protrusions 421 can be pressed against the upper surface of the locking slider 3. When the locking slider 3 cannot fall smoothly in the vertical cavity 11, the limiting protrusions 421 can press against the locking slider 3 to make the locking slider 3 fall through external force, thereby ensuring the smooth unlocking of the locking slider 3 and the push-pull rod 5.

[0059] In one embodiment of the present invention, Figure 10 and Figure 11 As shown, two vertical grooves 14 are symmetrically provided on both sides of the bracket 1 and communicate with the vertical cavity 11. Two vertical stoppers 34 are symmetrically provided on both sides of the locking slider 3. When the locking slider 3 is inserted into the vertical cavity 11 through the upper opening 111 of the bracket 1, the vertical stoppers 34 are embedded in the vertical grooves 14. The provision of the vertical grooves 14 can prevent the locking slider 3 from falling out of the bracket 1 when moving up and down in the vertical cavity 11.

[0060] In one embodiment of the present invention, Figure 8 and Figure 9 As shown, the bottom wall of the bracket 1 is provided with a horizontal groove 15 that communicates with the horizontal cavity 12. A horizontal stopper 216 is provided at the bottom of the pressing slider 21. The horizontal stopper 216 is disposed so as to be horizontally movable within the horizontal groove 15. After the pressing slider 21 is inserted into the horizontal cavity 12 through the opening 121, the horizontal stopper 216 engages with the horizontal groove 15, thereby preventing the pressing slider 21 from escaping from the horizontal cavity 12 as it reciprocates within the horizontal cavity 12.

[0061] Implementation Method 2

[0062] like Figures 1 to 12 As shown, the present invention also provides a charging device, which includes a pusher, which is the pusher described in embodiment 1, and its structure, working principle and beneficial effects are the same as those in embodiment 1, and will not be repeated here. The charging device also includes a shell 10 and a locking joint 20, wherein: the above-mentioned pusher is installed in the shell 10 of the charging device, one end of the reset rod 22 of the pusher is against the inner wall of the shell 10, the shell 10 has a connected charging chamber 101 and a pushing chamber 102, the pusher is arranged in the pushing chamber 102, one end of the push-pull rod 5 extends into the charging chamber 101, and the other end of the push-pull rod 5 is provided with a gripping handle 52; the locking joint 20 is connected to one end of the shell 10 through a connecting pipe 201, and the connecting pipe 201 is connected to the charging chamber 101 of the shell 10.

[0063] Specifically, the shell 10 is generally in the shape of a pistol, and a pressure chamber 101 is formed at the front end of the shell 10. In this embodiment, a connecting tube 201 is connected to the outside of the front end of the shell 10, and the connecting tube 201 is provided with a locking joint 20 that can be connected to a medical balloon, thereby ensuring that the liquid (such as contrast agent) in the pressure chamber 101 of the shell 10 is injected into the medical balloon through the connecting tube 201 and the locking joint 20; the rear end of the shell 10 forms a pushing chamber 102 in which a pusher can be placed. When the pusher is placed into the pushing chamber 102 from the rear end of the shell 10, a sealing plate 103 is fixedly connected to the rear end of the shell 10 to achieve sealing of the shell 10.

[0064] Furthermore, a pressure gauge 104 is provided on the housing 10 , and the pressure gauge 104 is connected to the pressure charging chamber 101 . The pressure gauge 104 can detect the liquid pressure in the pressure charging chamber 101 in real time.

[0065] In this embodiment, one end of the push-pull rod 5 of the pusher extending into the pressure chamber 101 is connected to a sealing rubber plug (not shown in the figure), which is in sealing sliding contact with the inner wall of the housing 10. The provision of the sealing rubber plug can prevent the liquid in the pressure chamber 101 from leaking into the push chamber 102, and the provision of the sealing rubber plug can also facilitate the push-pull rod 5 to squeeze the liquid in the pressure chamber 101.

[0066] When the charging device is in use, by pressing the pressing handle 4 of the pusher, the pressing slider 21 moves from one end of the horizontal cavity 12 to the other end under the action of the two insertion plates 42 of the pressing handle 4. At this time, the locking slider 3 moves down, releasing the locking relationship with the push-pull rod 5. The holding handle 52 of the push-pull rod 5 is held to pull the push-pull rod 5, and the liquid is drawn into the charging cavity 101 of the shell 10 by suction. This process is similar to the operation of extracting liquid with a medical syringe; when the charging cavity 101 is filled with a certain amount of liquid and liquid needs to be injected into the medical balloon, the holding handle 52 of the push-pull rod 5 is held to push the push-pull rod 5 in the direction of the charging cavity 101 to realize the liquid filling operation of the medical balloon. This process is similar to the operation of injecting liquid with a medical syringe. When there is no need to move the push-pull rod 5, release the downward pressure on the pressing handle 4, and the pressing slider 21 moves from the other end of the horizontal cavity 12 to the initial position under the action of the elastic restoring force of the spring 223 on the reset rod 22. At this time, the locking slider 3 moves upward under the action of the pressing slider 21, and then locks with the push-pull rod 5, fixing the push-pull rod 5 to a required position.

[0067] The charging device of the present invention can realize the locking and unlocking operations of the push-pull rod 5 under the condition of single-handed operation through the pusher. The charging device improves the convenience of the operator and makes the operation more flexible and convenient.

[0068] The above descriptions are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A pusher for a charging device, characterized in that: The pusher includes: A bracket having a vertical cavity and a horizontal cavity connected to each other; A reset mechanism comprises a pressing slider and a reset rod, one end of the reset rod being horizontally elastically connected to the pressing slider, and the pressing slider being horizontally movable in the horizontal cavity; a locking slider abutting against the upper end of the pressing slider, the locking slider being disposed in the vertical cavity so as to be movable up and down according to the horizontal movement of the pressing slider; A pressing handle can be inserted into the vertical cavity, and a pressing inclined surface is formed at the lower end of the pressing handle, and the pressing inclined surface abuts against the reset inclined surface on the pressing slider; A push-pull rod is horizontally movable and is arranged above the locking slider. A locking structure is provided between the push-pull rod and the locking slider.

2. The pusher of the charging device according to claim 1, characterized in that The locking structure includes a locking groove and a locking block that lock with each other. The locking groove is recessed on the upper surface of the locking slider, and a plurality of the locking blocks are spaced apart at intervals on the lower part of the push-pull rod along the direction of its horizontal movement; or the locking block is protruding on the upper surface of the locking slider, and a plurality of the locking grooves are recessed at intervals on the lower part of the push-pull rod along the direction of its horizontal movement.

3. The pusher of the charging device according to claim 1, characterized in that: The locking structure includes an internal thread groove provided on the upper portion of the locking slide block and an external thread rod threadedly connected to the internal thread groove, wherein the external thread rod is provided on the push-pull rod.

4. The pusher of the charging device according to claim 3, characterized in that: The external thread rod has a trapezoidal thread tooth that prevents the push-pull rod from retreating from the internal thread groove, and the length of the retreat side of the trapezoidal thread tooth is smaller than the length of the feed side of the trapezoidal thread tooth.

5. The pusher of the charging device according to claim 1, characterized in that: A horizontal connecting hole is provided in the pressing slider of the reset mechanism, a protrusion is provided in the horizontal connecting hole, and a sliding groove is provided on the reset rod; an abutment ring is provided at one end of the reset rod, and a spring is clamped between the abutment ring and the bracket, and the spring is sleeved on the reset rod, and the protrusion can be horizontally elastically set in the sliding groove through the spring.

6. The pusher of the charging device according to claim 5, characterized in that: The other end of the reset rod is provided with a conversion opening groove connected to the sliding groove. The conversion opening groove is arranged parallel to the sliding groove. The protrusion is inserted into the sliding groove through the conversion opening groove.

7. The pusher of the charging device according to claim 5 or 6, characterized in that: An introduction rib is convexly provided on the reset rod, and an introduction groove matched with the introduction rib is provided in the connecting hole.

8. The pusher of the charging device according to claim 1, characterized in that: An upper stepped slope is provided on the upper surface of the pressing slider, and a lower stepped slope is provided on the lower surface of the locking slider, wherein the upper stepped slope matches the lower stepped slope.

9. The pusher of the charging device according to claim 8, characterized in that: The upper step inclined surface is formed on an upper step protrusion convexly provided on the upper surface of the pressing slider, and a guide groove is provided on the upper step protrusion. The lower step inclined surface is formed on a lower step protrusion convexly provided on the lower surface of the locking slider, and a guide block is provided on the lower step protrusion. The guide block can be slidably set in the guide groove.

10. The pusher of the charging device according to claim 1, characterized in that: The pressing handle has two symmetrically arranged inserting plates, the lower ends of the inserting plates are formed with the pressing inclined surfaces, and two resetting inclined surfaces are symmetrically provided on both sides of the pressing slider.

11. The pusher of the charging device according to claim 1, characterized in that: Two vertical slots communicating with the vertical cavity are symmetrically provided on both sides of the bracket, and two vertical limiting blocks are symmetrically provided on both sides of the locking slider. The vertical limiting blocks can be slidably arranged in the vertical slots.

12. The pusher of the charging device according to claim 1, characterized in that: The bottom wall of the bracket is provided with a horizontal groove connected with the horizontal cavity, and the bottom of the pressing slider is provided with a horizontal limit block, and the horizontal limit block can be horizontally moved into the horizontal groove.

13. A charging device, characterized in that: It comprises the pusher according to any one of claims 1 to 12, wherein the charging device further comprises: The housing has a connected charging chamber and a pushing chamber, the pusher is arranged in the pushing chamber, one end of the push-pull rod extends into the charging chamber, and the other end of the push-pull rod is provided with a gripping handle; A locking joint is connected to one end of the shell through a connecting pipe, and the connecting pipe is communicated with the pressure charging chamber of the shell.

14. The charging device according to claim 13, wherein: A pressure gauge is provided on the housing and is communicated with the pressure charging chamber.

15. The charging device according to claim 13, wherein: One end of the push-pull rod extending into the pressure chamber is connected to a sealing rubber plug, and the sealing rubber plug is in sealing sliding contact with the inner wall of the shell.

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