CN207785268U - Bone cement injector - Google Patents

Abstract

The utility model is related to a kind of bone cement injectors, including injection tube, injection ram, push rod, support component, movable block and moving member.Push rod lateral wall is equipped with the first thread segment, and push rod one end is connected with injection ram.Support component is arranged on injection tube.Movable block is slidably disposed in support component, and movable block has the first contact surface for contacting push rod lateral wall.First contact surface is equipped with second thread segment adaptable with the screw thread of the first thread segment.Moving member is for driving movable block to be slided in support component, so that the first contact surface is in contact with push rod lateral wall.Moving member driving movable block makes the first contact surface be in contact with push rod lateral wall, the second thread segment on such movable block, which can move the straight line pull of push rod, plays limitation, and rotating push-rod can be such that push rod is pushed further into injection tube, it is avoided that and occurs injecting failure phenomenon under big injection pressure working condition, can successfully inject bone cement in human body.

Description

Bone cement injector

Technical field

The utility model is related to a kind of injectors, more particularly to a kind of bone cement injector.

Background technology

In vertebroplasty, bone cement is perfused into centrum makes its streamer filling sutura and gap, can play so firm The effect of centrum.Concrete operation method is：First bone cement powder is poured into bowl-shape blender, liquid is passed through and stirring forms bone Then bone cement is filled into from blender in injector by cement, install injector, bone cement is injected to people using injector In vivo.However, when bone cement is injected in human body, often there is larger injection pressure in the injection end of injector, so that Bone cement cannot be injected in human body, there are the risks of operative failure.

Utility model content

Based on this, it is necessary to overcome the deficiencies of existing technologies, provide a kind of bone cement injector, it can be smoothly by bone water Mud is injected into human body, is improved bone cement and is injected success rate of operation.

Its technical solution is as follows：A kind of bone cement injector, including：Injection tube, injection ram and push rod, the injection are lived Plug is arranged in the injection tube, and the push rod lateral wall is equipped with the first thread segment, described push rod one end and the injection ram It is connected；Support component, the support component are arranged on the injection tube；Movable block, the movable block are slidably disposed on In the support component, the movable block has the first contact surface for contacting the push rod lateral wall, first contact Face is equipped with second thread segment adaptable with the screw thread of first thread segment；And moving member, the moving member and the work Motion block transmission is connected, and the moving member is for driving the movable block to be slided in the support component, so that described first connects Contacting surface is in contact with the push rod lateral wall.

Above-mentioned bone cement injector, injection tube is interior before filling bone cement, the first contact surface and push rod of movable block Lateral wall be separated, in this way can pull push rod, bone cement is sucked into injection tube；It is mobile during injecting bone cement Part driving movable block slides in support component, and the first contact surface is made to be in contact with push rod lateral wall, and the on the first contact surface Screw thread on one thread segment just mutually agrees with the second thread segment, and the second thread segment on such movable block can be to the straight line of push rod Limitation is played in pull movement, and rotating push-rod can be such that push rod is pushed further into injection tube, stop operating push rod when, then by movable block On the second thread segment limitation push rod movement, inject failure phenomenon, energy under big injection pressure working condition so as to avoid the occurrence of It is enough that successfully bone cement is injected into human body.

The support component includes sleeve, the first limited block and the second limited block, the set in one of the embodiments, Cylinder is arranged in the end of the injection tube and is set in outside the push rod；Between first limited block and second limited block Every the madial wall in the sleeve is arranged, the movable block is slidably disposed on first limited block and is limited with described second Between block.In this way, being contradicted in movable block both ends of the surface by the first limited block, the second limited block, avoid movable block in injection tube Mobile phenomenon occurs on axial direction.

The sleeve lateral wall is equipped with the first insert port in one of the embodiments, and the moving member passes through described first Insert port is encased in the sleeve and can be moved along the injection tube axial direction, the moving member end with it is described Movable block end is engaged；The second contact surface being in contact with the movable block on the moving member end is guiding surface, And/or the third contact surface being in contact with the moving member on the movable block end is guiding surface.It is mobile when original state Part end is engaged with movable block end, and the first contact surface of movable block is separated with push rod lateral wall at this time, and movable block rises Less than the effect of locking push rod, push rod can carry out pull movement；It, can be by moving member along injection tube axial direction in injection process Direction is pushed into, and under guiding surface guiding role, moving member will push movable block that the first contact surface is made to contact push rod lateral wall, living Motion block just can play the role of locking push rod, and after push-in moving member, moving member side wall contradicts movable block side wall, makes first to connect Contacting surface tight contacts between push rod lateral wall.

The sleeve lateral wall is equipped with the second insert port in one of the embodiments, and the moving member passes through described second Insert port is encased in the sleeve, and the moving direction of the moving member and the glide direction of the movable block are adapted.Such as This, pushes moving member so that movable block is slided and contact the lateral wall of push rod.

The bone cement injector further includes locating part in one of the embodiments, and the locating part, which has, to be inserted into End, the sleeve lateral wall be equipped with third insert port, the locating part be encased in the sleeve by the third insert port and It can be moved along the injection tube axial direction, end face of the movable block towards the locating part is described equipped with being inserted into First jack of insertion end, when the first contact surface of the movable block contacts the lateral wall of the push rod, first jack It is corresponding to the insertion end position.In this way, after pushing moving member so that movable block is slided and contact the lateral wall of push rod, the first jack It is corresponding to end position is inserted into, the insertion end of locating part is inserted into the first jack, position-limiting action can be played to movable block. In addition, end face of the movable block towards locating part is equipped with the second jack for being inserted into the insertion end, first in movable block connects When contacting surface is detached with push rod lateral wall, the insertion end of locating part can be inserted into the second jack, to limit movable block Position.

The bone cement injector further includes the elastic recovery being arranged in the sleeve in one of the embodiments, Part, elastic recovery part one end are connected with the set medial wall of the tube, and elastic recovery part one end and the movable block are separate The side of the moving member is connected.In this way, after bone cement injection process, elastic recovery part pushes movable block, makes activity First contact surface of block is separated with push rod lateral wall, consequently facilitating completing the reset operation of movable block.In the present embodiment, elasticity Reply part is spring.Movable block is equipped with first through hole, and push rod is installed in first through hole, and the outer diameter of push rod is than first through hole Diameter is small, and the madial wall in first through hole is arranged in the first contact surface.

The moving member includes gear and rotation axis in one of the embodiments,；The gear is rotatably arranged with institute Sleeve inner is stated, the gear is connected with the rotation axis, and the sleeve lateral wall is equipped with the second through-hole, and the rotation axis passes through institute It states the second through-hole and stretches out the cartridge exterior；The movable block end face is equipped with the rack being meshed with the gear, the rack The glide direction of setting direction and the movable block be adapted.When original state, outside the first contact surface and push rod of movable block Side wall is separated, and movable block does not have the effect of locking push rod, and push rod can carry out pull movement；In injection process, Ke Yitong The rotation of rotation axis sliding tooth wheel is crossed, movable block movement will be driven when gear rotates, pushes movable block that the contact of the first contact surface is made to push away Bar lateral wall, movable block just can play the role of locking push rod.

The bone cement injector further includes ratchet mechanism in one of the embodiments, and the ratchet mechanism includes Single direction ratchet and the pawl being equipped with the single direction ratchet, the single direction ratchet are coaxially disposed with the gear, the spine Pawl is rotatably arranged on the sleeve.Ratchet mechanism make gear can only one direction rotation, the first of such movable block connects When contacting surface is in contact with push rod lateral wall, gear cannot turn round, and just play position-limiting action to movable block, and the first of movable block is made to connect Contacting surface tight contacts between push rod lateral wall.

The moving member includes cam and oscillating rod in one of the embodiments,；The cam is rotatably arranged in On the sleeve, the cam is connected with the oscillating rod, and the cam is with the movable block far from first limited block Side wall is in contact；The sleeve lateral wall is provided with open region, and the oscillating rod is reached by the open region outside the sleeve Portion.In this way, oscillating rod is swung, band moving cam rotates, and after cam rotation, movable block can be pushed to move, make the first of movable block Contact surface contacts push rod lateral wall.In addition, after cam swings push movable block, since the first contact surface of movable block contacts push rod Lateral wall, cam will be unable to be rotated further and form lockup state, so that the first contact surface tightly contradicts push rod lateral wall.

The bone cement injector further includes handle in one of the embodiments, the push rod other end with it is described Handle is connected.The handle of push rod end can be convenient for driving push rod to rotate, conducive to injecting bone cement into human body.

Description of the drawings

Fig. 1 is the state of the bone cement injector described in the one of embodiment of the utility model injected before bone cement Schematic diagram；

Fig. 2 is the shape during the injection bone cement of the bone cement injector described in the one of embodiment of the utility model State schematic diagram；

Fig. 3 is the structural schematic diagram of the bone cement injector described in the utility model another embodiment；

Fig. 4 is the structural schematic diagram of the bone cement injector described in the utility model another embodiment；

Fig. 5 is the structural schematic diagram of the bone cement injector described in the utility model further embodiment.

10, injection tube, 20, injection ram, 30, push rod, the 31, first thread segment, 41, sleeve, the 411, first insert port, 412, the second insert port, 413, third insert port, the 42, first limited block, the 43, second limited block, 44, open region, 50, activity Block, the 51, first contact surface, 52, third contact surface, the 53, first jack, 54, first through hole, 55, rack, 60, moving member, 61, Second contact surface, 62, gear, 63, rotation axis, 64, single direction ratchet, 65, pawl, 66, cam, 67, oscillating rod, 70, locating part, 71, insertion end, 80, elastic recovery part, 90, handle.

Specific implementation mode

To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, below in conjunction with the accompanying drawings to this The specific implementation mode of utility model is described in detail.Elaborate many details in order to abundant in the following description Understand the utility model.But the utility model can be much to implement different from other manner described here, this field Technical staff can do similar improvement without prejudice to the utility model connotation, therefore the utility model is not by following public affairs The limitation for the specific embodiment opened.

In the description of the present invention, it should be understood that term " first ", " second " are used for description purposes only, and It should not be understood as indicating or imply relative importance or implicitly indicate the quantity of indicated technical characteristic.It defines as a result, The feature of " first ", " second " can explicitly or implicitly include at least one of the features.In the description of the present invention, The meaning of " plurality " is at least two, such as two, three etc., unless otherwise specifically defined.

Can be straight when an element is considered as " connection " another element it should be noted that in following embodiment It is connected to another element in succession or may be simultaneously present intermediary element.On the contrary, when element is to be referred to as " direct " and another element When connection, intermediary element is not present.

As shown in Figures 1 to 5, a kind of bone cement injector, including injection tube 10, injection ram 20, push rod 30, support group Part, movable block 50 and moving member 60.The injection ram 20 is arranged in the injection tube 10.30 lateral wall of the push rod is equipped with First thread segment 31,30 one end of the push rod are connected with the injection ram 20.The support component is arranged in the injection tube On 10.The movable block 50 is slidably disposed in the support component, and the movable block 50 has for contacting described push away First contact surface 51 of 30 lateral wall of bar.First contact surface 51 is equipped with to be adapted with the screw thread of first thread segment 31 The second thread segment.The moving member 60 is connected with the transmission of the movable block 50, and the moving member 60 is for driving the activity Block 50 slides in the support component, so that first contact surface 51 is in contact with 30 lateral wall of the push rod.

Above-mentioned bone cement injector, injection tube 10 is interior before filling bone cement, the first contact surface 51 of movable block 50 With 30 lateral wall of push rod be separated, in this way can pull push rod 30, bone cement is sucked into injection tube 10；Inject bone cement In the process, moving member 60 drives movable block 50 to be slided in support component, and the first contact surface 51 is made to connect with 30 lateral wall of push rod It touches, the screw thread on the first thread segment 31 on the first contact surface 51 just mutually agrees with the second thread segment, on such movable block 50 Second thread segment can move the straight line pull of push rod 30 and play limitation, and rotating push-rod 30 can make push rod 30 be pushed further into note In shooting cylinder 10, stop operating push rod 30 when, then by movable block 50 the second thread segment limitation push rod 30 move, to be avoided that Occur injecting failure phenomenon under big injection pressure working condition, successfully bone cement can be injected into human body.

In the present embodiment, the support component includes sleeve 41, the first limited block 42 and the second limited block 43.The sleeve 41 are arranged in the end of the injection tube 10 and are set in outside the push rod 30, and first limited block 42 is limited with described second Position block 43 is arranged at intervals on the madial wall of the sleeve 41.The movable block 50 is slidably disposed on first limited block 42 Between second limited block 43.In this way, being contradicted at 50 both ends of movable block by the first limited block 42, the second limited block 43 Face avoids movable block 50 that mobile phenomenon occurs on the axial direction of injection tube 10.In other embodiments, 41 madial wall of sleeve Guide rail, the sliding block that accordingly setting is slidably matched with guide rail of movable block 50 can be provided with；Alternatively, 41 madial wall of sleeve can be arranged There are guide sleeve, the guide rod that accordingly setting is slidably matched with guide sleeve of movable block 50.

In one embodiment, it please refers to Fig.1 and Fig. 2,41 side wall of the sleeve is equipped with the first insert port 411.The shifting Moving part 60 is encased in the sleeve 41 by first insert port 411 and can be along 10 axial direction of the injection tube Mobile, 60 end of the moving member is engaged with 50 end of the movable block.On 60 end of the moving member with the activity The second contact surface 61 that block 50 is in contact is to connect with the moving member 60 on 50 end of guiding surface and/or the movable block Tactile third contact surface 52 is guiding surface.When original state, 60 end of moving member is engaged with 50 end of movable block, at this time The first contact surface 51 and 30 lateral wall of push rod of movable block 50 are separated, and movable block 50 does not have the effect of locking push rod 30, pushes away Bar 30 can carry out pull movement；In injection process, moving member 60 can be pushed into along 10 axial direction of injection tube, be oriented to Under inclined-plane guiding role, moving member 60 will push movable block 50 that the first contact surface 51 is made to contact 30 lateral wall of push rod, movable block 50 Just it can play the role of locking push rod 30, and after being pushed into moving member 60,60 side wall of moving member contradicts 50 side wall of movable block, makes the One contact surface 51 tight contacts between 30 lateral wall of push rod.

In another embodiment, referring to Fig. 3,41 side wall of the sleeve is equipped with the second insert port 412.The moving member 60 are encased in by second insert port 412 in the sleeve 41, and the moving direction of the moving member 60 and the activity The glide direction of block 50 is adapted.In this way, pushing moving member 60 that movable block 50 is made to slide and contacting the lateral wall of push rod 30.

Further, the bone cement injector further includes locating part 70.The locating part 70 has insertion end 71.Institute It states 41 side wall of sleeve and is equipped with third insert port 413.The locating part 70 is encased in the sleeve by the third insert port 413 It can move in 41 and along 10 axial direction of the injection tube.End face of the movable block 50 towards the locating part 70 is set There is the first jack 53 for being inserted into the insertion end 71.When the first contact surface 51 of the movable block 50 contacts the push rod 30 Lateral wall when, first jack 53 is corresponding to 71 position of the insertion end.In this way, pushing moving member 60 that movable block 50 is made to slide After moving and contacting the lateral wall of push rod 30, the first jack 53 is corresponding to 71 position of insertion end, and the insertion end 71 of locating part 70 is inserted Enter into the first jack 53, position-limiting action can be played to movable block 50.In addition, end face of the movable block 50 towards locating part 70 Equipped with the second jack for being inserted into the insertion end 71, detached with 30 lateral wall of push rod in the first contact surface 51 of movable block 50 When, the insertion end 71 of locating part 70 can be inserted into the second jack, to be limited to movable block 50.

It on the basis of previous embodiment, please refers to Fig.1 to Fig.3, the bone cement injector further includes being arranged in institute State the elastic recovery part 80 in sleeve 41.Described 80 one end of elastic recovery part is connected with 41 madial wall of the sleeve, the elasticity 80 one end of part is replied with side of the movable block 50 far from the moving member 60 to be connected.In this way, working as bone cement injection process knot Shu Hou, elastic recovery part 80 push movable block 50, and the first contact surface 51 of movable block 50 is made to be separated with 30 lateral wall of push rod, from And convenient for completing the reset operation of movable block 50.In the present embodiment, elastic recovery part 80 is spring.It is logical that movable block 50 is equipped with first Hole 54, push rod 30 are installed in first through hole 54, and the outer diameter of push rod 30 is smaller than the diameter of first through hole 54, the first contact surface 51 Madial wall in first through hole 54 is set.

In one embodiment, referring to Fig. 4, the moving member 60 includes gear 62 and rotation axis 63.The gear 62 Inside the sleeve 41, the gear 62 is connected with the rotation axis 63.41 side wall of the sleeve is equipped with the Two through-holes.The rotation axis 63 is stretched out by second through-hole outside the sleeve 41.50 end face of the movable block be equipped with The rack 55 that the gear 62 is meshed, the setting direction of the rack 55 and the glide direction of the movable block 50 are adapted. When original state, the first contact surface 51 and 30 lateral wall of push rod of movable block 50 are separated, and movable block 50 does not have locking push rod 30 effect, push rod 30 can carry out pull movement；In injection process, gear 62 can be driven to rotate by rotation axis 63, tooth Movable block 50 will be driven to move when 62 rotation of wheel, pushes movable block 50 that the first contact surface 51 is made to contact 30 lateral wall of push rod, activity Block 50 just can play the role of locking push rod 30.

Further, the bone cement injector further includes ratchet mechanism.The ratchet mechanism includes single direction ratchet 64 And the pawl 65 being equipped with the single direction ratchet 64.The single direction ratchet 64 is coaxially disposed with the gear 62, the spine Pawl 65 is rotatably arranged on the sleeve 41.Ratchet mechanism make gear 62 can only one direction rotation, such movable block 50 The first contact surface 51 when being in contact with 30 lateral wall of push rod, gear 62 cannot turn round, and just play position-limiting action to movable block 50, The first contact surface 51 of movable block 50 is set to tight contact between 30 lateral wall of push rod.

In one embodiment, referring to Fig. 5, the moving member 60 includes cam 66 and oscillating rod 67.The cam 66 It is rotatably arranged on the sleeve 41, the cam 66 is connected with the oscillating rod 67, the cam 66 and the activity Side wall of the block 50 far from first limited block 42 is in contact.41 side wall of the sleeve is provided with open region 44, the oscillating rod 67 are reached by the open region 44 outside the sleeve 41.In this way, oscillating rod 67 is swung, band moving cam 66 rotates, cam After 66 rotations, movable block 50 can be pushed to move, the first contact surface 51 of movable block 50 is made to contact 30 lateral wall of push rod.In addition, After cam 66 swings promotion movable block 50, since the first contact surface 51 of movable block 50 contacts 30 lateral wall of push rod, cam 66 will It can not be rotated further and form lockup state, so that the first contact surface 51 tightly contradicts 30 lateral wall of push rod.

In the present embodiment, the bone cement injector further includes handle 90.30 other end of the push rod and the handle 90 are connected.The handle 90 of 30 end of push rod can be convenient for driving push rod 30 to rotate, conducive to injecting bone cement into human body.

Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, it is all considered to be the range of this specification record.

Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed, But therefore it can not be interpreted as the limitation to utility model patent range.It should be pointed out that for the common skill of this field For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.

Claims (10)

1. a kind of bone cement injector, which is characterized in that including：

Injection tube, injection ram and push rod, the injection ram are arranged in the injection tube, and the push rod lateral wall is equipped with the One thread segment, described push rod one end are connected with the injection ram；

Support component, the support component are arranged on the injection tube；

Movable block, the movable block are slidably disposed in the support component, and the movable block has described for contacting First contact surface of push rod lateral wall, first contact surface are equipped with second be adapted with the screw thread of first thread segment Thread segment；And

Moving member, the moving member are connected with movable block transmission, and the moving member is for driving the movable block described It is slided in support component, so that first contact surface is in contact with the push rod lateral wall.

2. bone cement injector according to claim 1, which is characterized in that the support component includes sleeve, the first limit Position block and the second limited block, the sleeve are arranged in the end of the injection tube and are set in outside the push rod；First limit Position block and second limited block are arranged at intervals on the madial wall of the sleeve, and the movable block is slidably disposed on described the Between one limited block and second limited block.

3. bone cement injector according to claim 2, which is characterized in that the sleeve lateral wall is equipped with the first insert port, The moving member is encased in the sleeve by first insert port and can be moved along the injection tube axial direction Dynamic, the moving member end is engaged with the movable block end；It is in contact with the movable block on the moving member end The second contact surface be that the third contact surface being in contact with the moving member on guiding surface and/or the movable block end is Guiding surface.

4. bone cement injector according to claim 2, which is characterized in that the sleeve lateral wall is equipped with the second insert port, The moving member is encased in by second insert port in the sleeve, and the moving direction of the moving member and the activity The glide direction of block is adapted.

5. bone cement injector according to claim 4, which is characterized in that further include locating part, the locating part has Insertion end, the sleeve lateral wall are equipped with third insert port, and the locating part is encased in the sleeve by the third insert port Interior and can be moved along the injection tube axial direction, end face of the movable block towards the locating part is equipped with and can insert The first jack for entering the insertion end, when the first contact surface of the movable block contacts the lateral wall of the push rod, described One jack is corresponding to the insertion end position.

6. the bone cement injector according to claim 3 or 5, which is characterized in that further include being arranged in the sleeve Elastic recovery part, elastic recovery part one end are connected with the set medial wall of the tube, elastic recovery part one end and the work Side of the motion block far from the moving member is connected.

7. bone cement injector according to claim 2, which is characterized in that the moving member includes gear and rotation axis； The gear is connected rotatably arranged with the sleeve inner, the gear with the rotation axis, and the sleeve lateral wall is equipped with the Two through-holes, the rotation axis stretch out the cartridge exterior by second through-hole；The movable block end face is equipped with and the tooth The rack being meshed is taken turns, the setting direction of the rack and the glide direction of the movable block are adapted.

8. bone cement injector according to claim 7, which is characterized in that further include ratchet mechanism, the ratchet mechanism The pawl being equipped with including single direction ratchet and with the single direction ratchet, the single direction ratchet are coaxially disposed with the gear, institute Pawl is stated to be rotatably arranged on the sleeve.

9. bone cement injector according to claim 2, which is characterized in that the moving member includes cam and oscillating rod； The cam is rotatably arranged on the sleeve, and the cam is connected with the oscillating rod, the cam and the activity Side wall of the block far from first limited block is in contact；The sleeve lateral wall is provided with open region, and the oscillating rod passes through described Open region reaches the cartridge exterior.

10. bone cement injector according to claim 1, which is characterized in that further include handle, the push rod other end with The handle is connected.