CN213372744U - Hand-held pressing and holding device - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, a handheld pressing and holding device is disclosed. The handheld pressing and holding device comprises a fixed rod, a movable rod and a plurality of clamping pieces, wherein a first cover body of the fixed rod is circumferentially provided with a plurality of first arc-shaped grooves and a plurality of fixing pins; the movable rod is rotatably installed in the fixed rod, a plurality of second arc-shaped grooves and a plurality of first straight grooves are formed in the second cover body of the movable rod along the circumferential direction, the first straight grooves extend along the radial direction of the movable rod, and the fixed pin is inserted in the second arc-shaped grooves in a sliding mode; the clamping pieces are uniformly arranged in the movable rod along the circumferential direction, first bulges are arranged on two sides of each clamping piece, second bulges are arranged on the first bulges, the first bulges are inserted into the first straight grooves in a sliding mode, and the second bulges are inserted into the first arc-shaped grooves in a sliding mode; the clamping pieces are further provided with self-locking structures, and the plurality of clamping pieces can be sequentially locked through the self-locking structures in the pressing and holding process. The handheld pressing and holding device of the embodiment of the application has the advantages of compact structure, reliable installation, stable motion and good universality.

Description

Hand-held pressing and holding device

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a handheld pressure is held device.

Background

With the continuous expansion of the application range of the ball valve in the heart valve replacement operation, how to quickly and effectively install the ball valve on a conveyor of the valve replacement operation becomes a problem of important attention at the present stage. A hand-held crimping device is one device used to address such problems.

At present, the handheld pressing and holding device on the market mainly has the following problems: the structure is loose and cannot bear large pressure and grip force; the moving rod and the clamping piece have poor motion stability; the clamping pieces have large gaps and insufficient universality, are only suitable for crimping valves with simple structures, and cannot be used for valves with barbs or complex structures. Further, there is a problem that the roundness after crimping cannot be ensured.

SUMMERY OF THE UTILITY MODEL

Based on above, the utility model aims at providing a compact structure, installation are reliable, the motion is steady, the good handheld device of pressing of commonality.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a hand-held crimping device comprising:

the fixing rod comprises two first cover bodies which are fixedly buckled, a first communication port is formed in the center of each first cover body, and a plurality of first arc-shaped grooves and a plurality of fixing pins are formed in the first cover bodies along the circumferential direction;

the movable rod is arranged in the fixed rod and can coaxially rotate relative to the fixed rod, the movable rod comprises two second cover bodies which are fixedly buckled, the second cover bodies are provided with second communication ports, the second communication ports are communicated with the first communication ports, the second cover bodies are circumferentially provided with a plurality of second arc-shaped grooves and a plurality of first straight grooves, the first straight grooves extend along the radial direction of the movable rod, and the fixed pins are inserted in the second arc-shaped grooves in a sliding mode;

the clamping pieces are uniformly arranged in the moving rod along the circumferential direction, first bulges are arranged on two sides of each clamping piece, second bulges are arranged on the first bulges, the first bulges are inserted into the first straight grooves in a sliding mode, the second bulges are inserted into the first arc-shaped grooves in a sliding mode, and when the moving rod rotates relative to the fixed rod, the clamping pieces move in a reciprocating mode along the radial direction of the moving rod to enlarge or reduce the pressing and holding opening; the clamping pieces are further provided with self-locking structures, and the clamping pieces can be sequentially locked through the self-locking structures after being pressed and held in place.

As a preferred scheme of the handheld pressing and holding device, a plurality of gear structures are arranged on the inner side of the moving rod, the gear structures and the first straight grooves are arranged in a one-to-one correspondence mode, each pair of corresponding gear structures and the first straight grooves are parallel to each other, and when the clamping pieces are installed, the outer sides of the clamping pieces are respectively attached to the corresponding gear structures.

As a preferable scheme of the handheld pressing and holding device, the clamping pieces are provided with concave structures, and the clamping pieces can be sequentially attached to each other through the concave structures in the pressing and holding process.

As a preferable scheme of the handheld crimping device, the self-locking structure comprises a first locking portion arranged on the inner side of the concave structure and a second locking portion arranged on the outer side of the concave structure, and two adjacent clamping pieces can be locked through the matching of the first locking portion and the second locking portion in the crimping process.

As a preferred scheme of the handheld pressing and holding device, the tail end of the clamping piece is provided with a splicing corner, the splicing corner comprises a first straight edge and a second straight edge which are arranged in an angle mode, and a transition circular arc connected between the first straight edge and the second straight edge, wherein the first straight edge is close to the tail end of the clamping piece, and when the handheld pressing and holding device is pressed and held to the minimum diameter, the clamping piece is enabled to form a regular polygon with a round angle through the splicing corners of the clamping piece.

As a preferable scheme of the handheld crimping device, the number of the clamping pieces is six, the angle between the first straight edge and the second straight edge is 150 degrees, and when the handheld crimping device is crimped to a minimum diameter, the splicing angles of the six clamping pieces enable the crimping mouth to form a regular dodecagon with round corners.

As a preferred scheme of the handheld pressing and holding device, the clamping piece is made of a self-lubricating material, and surface grains of the clamping piece are consistent with the moving direction of the clamping piece relative to the moving rod and the relative moving direction between adjacent clamping pieces.

As a preferable scheme of the handheld crimping device, the first protrusion on the clamping piece is a rectangular protrusion, and the second protrusion is a cylindrical protrusion.

As a preferable scheme of the handheld crimping device, the two first covers of the fixing rod are connected by a thread structure, a buckle structure, a positioning pin structure or a rivet structure, and the two second covers of the moving rod are connected by a thread structure, a buckle structure, a positioning pin structure or a rivet structure.

The utility model has the advantages that:

the utility model discloses set up the fixed pin on the first lid of dead lever, set up the second arc wall on the second lid of carriage release lever, through the sliding fit of fixed pin with the second arc wall, realized the steady rotation of carriage release lever dead lever relatively, improved the holistic motion stationarity of device. The first bulges are arranged on the two sides of the clamping piece, the second bulges are arranged on the first bulges, the first bulges are inserted into the first straight groove in a sliding mode, and the second bulges are inserted into the first arc-shaped groove in a sliding mode, so that the device is compact in whole, and more convenient and reliable to install. The self-locking structure is arranged on the clamping piece, so that the handheld pressing and holding device is locked at the final stage of pressing and holding, the valve pressing and holding time is prolonged, and the operation of the handheld pressing and holding device is simplified. In addition, the self-locking structure enables the clamping pieces to be locked and tightly attached to each other, so that the clamping pieces can bear large pressure holding force, and the barb structures in the valve are prevented from being clamped into gaps between the clamping pieces due to the tight attachment of the clamping pieces, so that the pressure holding device not only can be suitable for pressure holding of the valve with a simple structure, but also can be suitable for pressure holding of the valve with barbs or a complex structure, and the universality of the device is improved.

Drawings

Fig. 1 is a front view of a hand-held crimping device provided by an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of a handheld crimping device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a fixing rod of a handheld crimping device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a moving rod of the handheld crimping device according to an embodiment of the present invention;

fig. 5 is a schematic structural view illustrating a plurality of clamping members spliced to form a crimping opening according to an embodiment of the present invention;

fig. 6 is a schematic view of a first perspective structure of a clamping member according to an embodiment of the present invention;

fig. 7 is a schematic view of a second perspective structure of the clamping member according to the embodiment of the present invention;

fig. 8 is an enlarged schematic view of a splicing angle in a clamping member according to an embodiment of the present invention.

In the figure:

1. fixing the rod; 10. a first cover body; 11. a first communication port; 12. a first arc-shaped slot; 13. a fixing pin; 2. a travel bar; 20. a second cover body; 21. a second communication port; 22. a second arc-shaped slot; 23. a first straight groove; 24. a gear structure; 3. a clamping member; 30. pressing the holding opening; 31. a first protrusion; 32. a second protrusion; 33. a concave structure; 34. a first locking portion; 35. a second locking portion; 36. splicing the corners; 361. a first straight side; 362. a second straight side; 363. a transition arc.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 8, the present embodiment provides a handheld crimping device for crimping medical device stents such as valve stents. The hand-held crimping device comprises a fixed rod 1, a movable rod 2 and a plurality of clamping pieces 3. The fixed rod 1 comprises two first cover bodies 10 which are fixedly buckled, the first cover bodies 10 are of circular shell structures, and first handle parts are arranged on the first cover bodies 10 in an extending mode so as to be convenient for operators to use; the two first covers 10 may be connected by a screw structure or a snap structure or a dowel structure or a rivet structure. The movable rod 2 is arranged in the fixed rod 1 and can coaxially rotate relative to the fixed rod 1, the movable rod 2 comprises two fixedly buckled second cover bodies 20, the second cover bodies 20 are of circular shell structures, and second handle parts are further arranged on the second cover bodies in an extending mode so as to be convenient for operators to use; the two second covers 20 may be connected by a screw structure or a snap structure or a dowel structure or a rivet structure. The center of the first cover body 10 is provided with a first communication port 11, the second cover body 20 is provided with a second communication port 21, and the second communication port 21 is communicated with the first communication port 11; a plurality of holders 3 are evenly installed in carriage release lever 2 along the circumferencial direction, and the tail end of a plurality of holders 3 can splice and form and press and hold mouth 30, presses and holds mouth 30 and first intercommunication mouth 11 and second intercommunication mouth 21 all intercommunication to make things convenient for the valve to insert and press and hold mouth 30 and press and hold.

Particularly, first lid 10 is equipped with a plurality of fixed pins 13 along circumference, and second lid 20 is equipped with a plurality of second arc walls 22 along circumference, and when dead lever 1 and carriage release lever 2 were installed, fixed pin 13 slided to peg graft in second arc wall 22, through the sliding fit of fixed pin 13 with second arc wall 22, had realized the steady rotation of carriage release lever 2 relative dead lever 1, had improved the holistic motion stationarity of device. Further, the first cover 10 is provided with a plurality of first arc-shaped grooves 12 along the circumferential direction, the second cover 20 is provided with a plurality of first straight grooves 23 along the circumferential direction, and the first straight grooves 23 extend along the radial direction of the moving rod 2. The both sides of holder 3 all are equipped with first arch 31, are equipped with the protruding 32 of second on the first arch 31, and first arch 31 slides and pegs graft in first straight flute 23, and the protruding 32 of second slides and pegs graft in first arc wall 12 to carry on spacingly to the removal of holder 3, make holder 3 can follow the radial reciprocating motion of carriage release lever 2. The device is more compact in overall structure and more convenient and reliable to install. Further preferably, the first protrusion 31 on the clamping member 3 is a rectangular protrusion, and the rectangular protrusion is matched with the first straight groove 23, so that the clamping member 3 moves more stably and the moving direction is more accurate; the second protrusion 32 is a cylindrical protrusion, which can realize flexible and smooth movement of the second protrusion 32 in the first arc-shaped groove 12. It should be noted that, the positions and sizes of the first protrusion 31 and the second protrusion 32 of the clamping member 3 of the present embodiment can be finely adjusted according to parameters of different products, so that the handheld crimping device can meet requirements of crimping sizes and crimping strengths of products with different specifications. When the device is used, the fixed rod 1 is fixed, the movable rod 2 is rotated, the clamping piece 3 can move back and forth along the radial direction of the movable rod 2 through the interaction of the first straight groove 23 on the movable rod 2 and the first arc-shaped groove 12 on the fixed rod 1, and the pressing opening 30 is enlarged or reduced according to the designated direction, so that the purpose of pressing and holding or releasing the valve is achieved.

Further, the clamping pieces 3 are also provided with self-locking structures, and the clamping pieces 3 can be sequentially locked through the self-locking structures after being pressed and held in place. By arranging the self-locking structure on the clamping piece 3, the handheld crimping device is locked at the final stage of crimping, the valve crimping time is prolonged, and the operation of the handheld crimping device is simplified. In addition, each clamping piece 3 is locked and tightly attached to each other through the self-locking structure, so that the clamping device can bear large pressure holding force, and the barb structures in the valve are prevented from being clamped into gaps among the clamping pieces 3 due to the fact that each clamping piece 3 is tightly attached, so that the pressure holding device not only can be suitable for pressure holding of the valve with a simple structure, but also can be suitable for pressure holding of the valve with barbs or a complex structure, and the universality of the device is improved.

Preferably, a plurality of gear structures 24 are arranged on the inner side of the moving rod 2, the gear structures 24 are arranged in one-to-one correspondence with the first straight grooves 23, each pair of corresponding gear structures 24 and the first straight grooves 23 are parallel to each other, and when the plurality of clamping members 3 are installed, the outer side of each clamping member 3 is respectively attached to the corresponding gear structures 24. Due to the arrangement, when the handheld crimping device is used for crimping a valve, if a valve with larger crimping force is encountered, the gear structure 24 can increase the strength of the clamping piece 3 and prevent the clamping piece 3 from being broken outwards; at the same time, the gear structure 24 also guides the reciprocating movement of the clamping member 3.

In this embodiment, one side of each clamping piece 3 all is equipped with concave structure 33, and the opposite side of clamping piece 3 can peg graft in adjacent clamping piece 3's concave structure 33, and in the pressure process of holding, along with the reduction of pressure mouth 30, the increase of pressure power, a plurality of clamping pieces 3 pass through concave structure 33 and paste tightly in proper order to the pressure intensity of clamping piece 3 has been increased. By adopting the concave design, the clamping pieces 3 are buckled and attached to each other through the concave structure 33, and when the valve is pressed by the handheld pressing and holding device, if the valve with larger pressing and holding force is encountered, the clamping pieces 3 can be effectively prevented from being broken inwards.

Further, the self-locking structure comprises a first locking portion 34 arranged on the inner side of the concave structure 33 and a second locking portion 35 arranged on the outer side of the concave structure 33, and two adjacent clamping pieces 3 can be locked by the cooperation of the first locking portion 34 and the second locking portion 35 in the pressing and holding process. Preferably, the first locking portion 34 is a clamping groove, the second locking portion 35 is a buckle, and when the valve is pressed and held in place, the buckle can be clamped in the clamping groove, so that the clamping pieces 3 are fixed, and the clamping pieces 3 are prevented from moving, so that the valve can be continuously pressed and held by the pressing and holding device after hands are released, the labor is saved, and the operation process is simplified; after the pressure is held, the movable rod 2 can be rotated reversely by force, so that the buckle can be separated from the clamping groove, and the clamping piece 3 can be unlocked.

Further, the tail end of the clamping member 3 of the present embodiment is further provided with a splicing corner 36, and the splicing corners 36 of the plurality of clamping members 3 are spliced and matched to form the approximately circular crimping opening 30 in the crimping process. Specifically, the splice corner 36 includes a first straight side 361 and a second straight side 362 arranged at an angle, and a transition circular arc 363 connected between the first straight side 361 and the second straight side 362, wherein the first straight side 361 is close to the tail end of the clamping member 3, and when the handheld crimping device is crimped to the minimum diameter, the splice corners 36 of the plurality of clamping members 3 make the crimping mouth 30 form a regular polygon with rounded corners. Preferably, the number of the clamping members 3 is six, the angle between the first straight side 361 and the second straight side 362 is 150 degrees, when the handheld crimping device is crimped to the minimum diameter, the splicing angles 36 of the six clamping members 3 enable the crimping opening 30 to form a regular dodecagon with rounded corners, and the crimping opening 30 can be approximately regarded as a circle, so that the roundness of the crimped valve is effectively ensured. Through the arrangement of the splicing angle 36, the handheld pressing and holding device can meet the pressing and holding form formed by twelve common clamping pieces only by six clamping pieces, so that the material is greatly saved, the design is simplified, and the production cost is reduced. Further preferably, the present invention can adjust the length of the first straight edge 361 of each clamping member 3 and the radius of the transition arc 363 to adjust the outer diameter of the final crimping opening, thereby satisfying the crimping requirements of valves with different specifications. Illustratively, the length of the first straight side 361 of the clamping member 3 is 0.7mm (the length of the portion of the spliced second straight side 362 for forming the crimping opening 30 is also 0.7mm), and the radius of the rounded corner of the transition circular arc 363 is 2mm, so that the crimping opening 30 is formed into a circle with a radius of approximately 2mm when being crimped to the minimum caliber.

Preferably, the clamping member 3 is made of a self-lubricating material, and the surface texture of the clamping member 3 is consistent with the moving direction of the clamping member 3 relative to the moving rod 2 and the relative moving direction between the adjacent clamping members 3. The advantage of above-mentioned setting lies in, can reduce the resistance when holder 3 removes, also can make a plurality of holders 3 paste the zero clearance each other in the crimping process, and paste between two second lids 20 of each holder 3 and carriage release lever 2 tightly zero clearance, has further improved this handheld crimping device's commonality, makes it not only be applicable to the valve of conventional structure, but also be applicable to the valve of taking barb or other complicated structures.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (9)

1. A hand-held crimping device, comprising:

the fixing rod (1) comprises two first cover bodies (10) which are fixedly buckled, a first communication hole (11) is formed in the center of each first cover body (10), and a plurality of first arc-shaped grooves (12) and a plurality of fixing pins (13) are formed in the first cover bodies (10) along the circumferential direction;

the movable rod (2) is installed in the fixed rod (1) and can coaxially rotate relative to the fixed rod (1), the movable rod (2) comprises two second cover bodies (20) which are fixedly buckled, a second communication port (21) is formed in each second cover body (20), each second communication port (21) is communicated with the corresponding first communication port (11), a plurality of second arc-shaped grooves (22) and a plurality of first straight grooves (23) are formed in each second cover body (20) along the circumferential direction, the first straight grooves (23) extend along the radial direction of the movable rod (2), and the fixed pins (13) are inserted into the second arc-shaped grooves (22) in a sliding mode;

the clamping pieces (3) are uniformly arranged in the movable rod (2) along the circumferential direction, first protrusions (31) are arranged on two sides of each clamping piece (3), second protrusions (32) are arranged on the first protrusions (31), the first protrusions (31) are inserted into the first straight grooves (23) in a sliding mode, the second protrusions (32) are inserted into the first arc-shaped grooves (12) in a sliding mode, and when the movable rod (2) rotates relative to the fixed rod (1), the clamping pieces (3) move in a reciprocating mode along the radial direction of the movable rod (2) to increase or reduce the press-holding opening (30); the clamping pieces (3) are further provided with self-locking structures, and the clamping pieces (3) can be sequentially locked through the self-locking structures after being pressed and held in place.

2. The hand-held crimping device according to claim 1, characterized in that a plurality of gear structures (24) are provided on the inner side of the moving rod (2), the gear structures (24) are provided in a one-to-one correspondence with the first straight grooves (23), each pair of corresponding gear structures (24) and first straight grooves (23) are parallel to each other, and the outer sides of a plurality of clamping members (3) respectively abut against the corresponding gear structures (24) when they are mounted.

3. A hand-held crimping device according to claim 1, characterized in that the clamping members (3) are provided with a concave structure (33), by means of which concave structure (33) a plurality of clamping members (3) can be attached in succession during crimping.

4. A hand-held crimping device according to claim 3, characterized in that the self-locking structure comprises a first locking portion (34) arranged inside the female structure (33) and a second locking portion (35) arranged outside the female structure (33), wherein two adjacent clamping members (3) can be locked by cooperation of the first locking portion (34) and the second locking portion (35) during crimping.

5. The hand-held crimping device according to claim 1, characterized in that the tail end of the clamping member (3) is provided with a splicing corner (36), the splicing corner (36) comprises a first straight side (361) and a second straight side (362) which are arranged in an angle, and a transition circular arc (363) connected between the first straight side (361) and the second straight side (362), wherein the first straight side (361) is close to the tail end of the clamping member (3), and when the hand-held crimping device is crimped to a minimum diameter, the splicing corners (36) of a plurality of clamping members (3) enable the crimping mouth (30) to form a regular polygon with rounded corners.

6. The hand-held crimping device according to claim 5, characterized in that the number of the clamping pieces (3) is six, the angle between the first straight edge (361) and the second straight edge (362) is 150 degrees, and the splicing corners (36) of the six clamping pieces (3) enable the crimping mouth (30) to form a regular dodecagon with rounded corners when the hand-held crimping device is crimped to a minimum diameter.

7. The handheld crimping device according to claim 1, characterized in that the clamping members (3) are made of self-lubricating material, and the surface texture of the clamping members (3) is consistent with the moving direction of the clamping members (3) relative to the moving rod (2) and the relative moving direction between the adjacent clamping members (3).

8. The hand-held crimping device according to any of claims 1 to 7, characterized in that the first projection (31) on the clamping member (3) is a rectangular projection and the second projection (32) is a cylindrical projection.

9. The hand-held crimping device according to any one of claims 1 to 7, characterized in that the two first covers (10) of the fixed lever (1) are connected by a screw structure or a snap structure or a dowel structure or a rivet structure, and the two second covers (20) of the movable lever (2) are connected by a screw structure or a snap structure or a dowel structure or a rivet structure.

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