CN110946590B

CN110946590B - Pushing device for medical instrument

Info

Publication number: CN110946590B
Application number: CN201911402649.5A
Authority: CN
Inventors: 李运峰; 王土权; 吴江
Original assignee: Shenzhen Guiji Sensing Technology Co ltd
Current assignee: Shenzhen Guiji Sensing Technology Co ltd
Priority date: 2019-08-31
Filing date: 2019-12-30
Publication date: 2022-07-15
Anticipated expiration: 2039-12-30
Also published as: CN115245331A; CN110946590A; CN115153527A

Abstract

The invention relates to a pushing device for a medical instrument, comprising: a housing defining a distal surface located on a skin surface; a carrier assembly configured to be movable within the housing between a proximal position and a distal position, the carrier assembly being snap-fit to the housing, the carrier assembly including an engagement member for engaging a medical instrument; a connector cooperating with the housing and having a release mechanism for releasably engaging the carrier assembly with the housing; a touch member which is linked with the release mechanism of the connecting member and releases the conveying assembly from the housing by pressing the touch member; and a push drive disposed between the carriage assembly and the housing to move the carriage assembly from the proximal position to the distal position when the carriage assembly is released from the housing. In this case, the medical device can be moved to the skin surface by a predetermined pushing force by pressing the touch member, so that the medical device can be reliably applied to the skin by a single-handed operation of the user.

Description

Pushing device for medical instrument

Technical Field

The invention relates to a pushing device for medical instruments.

Background

For clinical diagnostics or personal health monitoring, it is sometimes desirable to insert a medical device containing an analyte sensor beneath the skin to detect the concentration of a particular component (e.g., glucose, salt, lactate, oxygen) in interstitial fluid.

In particular, it is necessary for diabetic patients to continuously monitor interstitial fluid glucose levels on a daily basis in real time to reduce or eliminate the occurrence of insulin-dependent complications of diabetes patients such as hypoglycemia and hyperglycemia. Typically, the glucose concentration in the interstitial fluid decreases from the first glucose concentration in the blood as the glucose concentration begins to decrease, thereby indicating that the decrease in glucose concentration in the interstitial fluid may be predictive of impending hypoglycemia.

Analyte monitoring devices that facilitate a user's on-the-fly real-time monitoring of the concentration of a particular constituent in interstitial fluid typically include an analyte sensor inserted beneath the skin in contact with the interstitial fluid and a sensor control device applied to the skin. And the analyte monitoring device is typically placed on the upper arm. In order to place the analyte monitoring device in the proper working position, it is often necessary to resort to a pushing device. I.e. the pushing means requires insertion of the analyte sensor under the skin while the sensor control means is applied to the skin. Such pushing devices typically require a single-handed operation by the user, and therefore require simple, safe operation and reliable insertion and application. In addition, to insert the analyte sensor under the skin, a needle tip is typically used. However, needle tips are often intimidating in pain, so such push devices often require the needle tip to be hidden from view by the user. Such pushing devices in the current market often have complex operation, uncontrollable pushing force, offset insertion process positions, and the analyte monitoring device is not properly inserted and applied, resulting in problems of poor user experience, unreliable monitoring results, and the like.

Disclosure of Invention

The present invention has been made in view of the above-mentioned state of the art, and an object thereof is to provide a pushing device for medical instruments which is simple and safe in operation and reliable in insertion and application.

To this end, the invention provides a pushing device for a medical instrument, comprising: a housing having a distal surface proximate a skin surface; a transport assembly configured to be movable within the housing between a proximal position and a distal position, the transport assembly being snap-fit to the housing, the transport assembly including an engagement member for engaging the medical instrument; a connector cooperating with the housing and having a release mechanism that can release the carrier assembly from engagement with the housing; a touch member which is linked with the release mechanism of the connecting member and releases the carrying assembly from the housing by touching the touch member; and a push drive disposed between the carriage assembly and the housing to move the carriage assembly from the proximal position to the distal position when the carriage assembly is released from the housing.

In the invention, a user presses the touch piece to be linked with the connecting piece so as to release clamping of the shell on the conveying assembly, and the conveying assembly pushes the medical instrument to the far-end surface on the skin surface under the pushing of the pushing driving piece. In this case, the medical device can be moved to the skin surface by a predetermined pushing force by pressing the touch member, and thus, the medical device can be reliably applied to the skin by one-handed operation of the user.

In addition, in the pushing device according to the present invention, the medical device may optionally include an analyte sensor in contact with subcutaneous tissue fluid and a sensor control device located on a skin surface. In this case, the analyte sensor may monitor the concentration of a particular component in the interstitial fluid and transmit the monitored data to the display device via the sensor control means, thereby facilitating the user to monitor the status of certain indicators in real time on a daily basis.

In the pushing device according to the present invention, the analyte sensor may be configured to detect glucose. Therefore, the glucose concentration in the body can be conveniently monitored by a user on a daily basis in real time.

In the pushing device according to the present invention, the pushing drive member may have a spring having both ends contacting the housing and the carrying member, respectively. In this case, when the housing is released from its engagement with the carrier assembly, the carrier assembly can be moved under the urging of the spring from the proximal position to the distal position, thereby enabling application of the medical device to the skin surface.

In addition, the pushing device according to the present invention optionally further comprises a needle tip support for supporting the needle tip and configured to be movable between a proximal position and a distal position within the housing, the needle tip support being releasably coupled to the carrying assembly by a coupling. Thereby, the needle tip can be moved between the proximal position and the distal position by the needle tip support.

In addition, in the pushing device according to the present invention, optionally, the pushing device further includes a retraction driving member disposed between the transport member and the needlepoint supporting section. In this case, after the insertion and application actions are completed, the needle tip support portion may be returned from the distal position to the proximal position by the retraction drive, thereby enabling the needle tip to be extracted from the body.

In the pushing device according to the present invention, the retracting drive may have a spring having both ends contacting the carrying member and the needle tip support portion, respectively. In this case, after the insertion and application actions are completed, the needle tip support part may be returned from the distal position to the proximal position under the urging of the spring, whereby the needle tip can be extracted outside the body.

In the pushing device according to the present invention, the housing may optionally include a biasing member that contacts the coupling member and releases the coupling of the carrying member to the needle tip support when the carrying member moves from the proximal position to the distal position. In this case, after the insertion and application actions are completed, the needle tip support portion may be automatically disengaged from the carrier assembly, and returned from the distal position to the proximal position by the retraction drive, thereby enabling the needle tip to be withdrawn from the body.

In addition, in the pushing device according to the present invention, optionally, the coupling member includes an elastic buckle releasably clamped with the needle tip support portion and a clamping piece clamped with the elastic buckle. In this case, the elastic buckle couples the needle tip support portion to the carrier assembly under the clamping of the card, thereby enabling the needle tip support portion to move from the proximal position to the distal position following the carrier assembly.

In the pushing device according to the present invention, the biasing member may touch the card and release the engagement of the card with the elastic buckle. In some examples, the coupling of the carriage assembly to the needle tip support can be released, whereby the biasing member can release the coupling of the carriage assembly to the needle tip support by releasing the card.

In addition, the pushing device according to the present invention may optionally be configured such that the engagement member releases the coupling to the medical instrument when the carrying member is moved from the proximal position to the distal position. In this case, the medical device may be detached from the delivery assembly so that it can be maintained in an applied state on the skin.

In addition, in the pushing device according to the present invention, optionally, when the needle tip support is at the proximal position, the needle tip does not exceed the distal surface. Thereby, the possibility of the needle tip penetrating the skin surface before triggering the pushing device can be reduced.

In addition, in the pushing device according to the present invention, optionally, the needle tip is provided with a needle groove having an opening, the needle tip passes through a hole provided on the medical instrument, and the analyte sensor is placed in the needle groove. In this case, the needle tip can penetrate the subcutaneous tissue and place the analyte sensor in the subcutaneous tissue, thereby enabling more adequate contact between the analyte sensor and the interstitial fluid.

In addition, the present invention relates to a push device, wherein optionally the needle tip is inserted below the skin surface and the analyte sensor is placed in contact with interstitial fluid and the sensor control means is applied on the skin surface when the needle tip support is moved from the proximal position to the distal position. In this case, the analyte sensor can monitor the concentration of a specific component in the interstitial fluid, and the monitoring data is transmitted to a display instrument which is convenient for a user to read through the sensor control device, so that the user can conveniently monitor certain indexes in real time on a daily basis.

In the pushing device according to the present invention, the touch member may be provided on an outer side of the housing. Therefore, a user can conveniently press the touch piece to start the pushing device.

In the pushing device according to the present invention, the connecting member may be deformed by pressing the touch member. In this case, the engagement of the carriage assembly with the housing can be released, whereby the carriage assembly can be moved from the proximal position to the distal position by the pusher drive.

Drawings

Fig. 1 is a schematic diagram showing a pushing device according to an embodiment of the present invention.

Fig. 2 is a schematic view showing the medical device according to the present embodiment.

Fig. 3 is a schematic configuration diagram showing the case according to the present embodiment.

Fig. 4 is an exploded view showing the pusher according to the present embodiment.

Fig. 5 is a partially enlarged view showing an exploded view of the pusher according to the present embodiment.

Fig. 6 is a further exploded view showing the pusher according to the present embodiment.

Fig. 7 is an exploded view showing a conveyance assembly according to the present embodiment.

Fig. 8 is an exploded view showing the carrier module and the needle tip support section according to the present embodiment.

Fig. 9 is a schematic view showing the needle tip according to the present embodiment.

Fig. 10 is a sectional view showing an initial state of the pushing device according to the present embodiment.

Fig. 11 is a sectional view showing the completion of pushing by the pushing device according to the present embodiment.

Fig. 12 is a sectional view showing the pusher according to the present embodiment after the needle tip is retracted.

Description of the symbols:

1 … pusher, 9 … medical device, 10 … housing, 11 … support body, 111 … distal surface, 112 … motion track, 113 … covering, 114 … snap-in arm, 12 … upper cover, 13 … base, 20 … carrying assembly, 21 … carrying body, 22 … flange, 23 … push joint, 24 … coupler, 241 … snap, 242 … card, 25 … engaging piece, 251 … engaging face, 252 … protrusion, 30 … connecting piece, 40 … touching piece, 41 … button, 50 … push driving piece, 51 … spring, 60 … needle point support, 70 … retraction driving piece, 71 … spring, 80 … needle point, 81 … needle groove.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same components are denoted by the same reference numerals, and redundant description thereof is omitted. The drawings are schematic, and the proportions of the dimensions of the components and the shapes of the components may be different from the actual ones.

Fig. 1 is a schematic diagram showing a pushing apparatus according to an embodiment of the present invention. Fig. 1(a) is an oblique plan view showing the pushing device according to the embodiment of the present invention, and fig. 1(b) is an oblique bottom view showing the pushing device according to the embodiment of the present invention. Fig. 2 is a schematic view showing the medical device according to the present embodiment. Fig. 2(a) is an oblique plan view showing the medical device according to the present embodiment, and fig. 2(b) is an oblique bottom view showing the medical device according to the present embodiment. Fig. 3 is a schematic configuration diagram showing the case according to the present embodiment. Fig. 4 is an exploded view showing the pusher according to the present embodiment.

In this embodiment, the pushing device 1 may include a housing 10, a carrying assembly 20, a connecting member 30, a touch member 40, and a pushing driving member 50. In the pushing device 1 according to the present embodiment, the housing 10 may have a distal end surface 111 close to the skin surface; the carrier assembly 20 is configured to be movable between a proximal position and a distal position within the housing 10, the carrier assembly 20 being snap-fitted to the housing 10, the carrier assembly 20 comprising an engagement member 25 for engaging the medical device 9; the connector 30 is fitted with the housing 10 and has a release mechanism that can release the clamping of the carrying assembly 20 with the housing 10; the touch 40 is linked with the release mechanism of the link 30, and the carrying assembly 20 is released from the housing 10 by pressing the touch 40; the pusher drive 50 is disposed between the carriage assembly 20 and the housing 10 to move the carriage assembly 20 from the proximal position to the distal position when the carriage assembly 20 is released from the housing 10.

In the pushing device 1 according to the present embodiment, the user can release the clamping of the housing 10 to the transporting assembly 20 by pressing the touch member 40, and the transporting assembly 20 pushes the medical instrument 9 to the distal end surface 111 under the pushing of the pushing driving member 50. In this case, when the distal end surface 111 is placed against the skin surface, the medical device 9 is moved to the skin surface with a predetermined pushing force by pressing the touch member 40, so that the medical device 9 can be reliably applied to the skin by a single-handed operation of the user.

(medical device)

In this embodiment, the medical device 9 may comprise an analyte sensor 91 for contact with interstitial fluid below the skin surface and a sensor control means 92 which may be placed on the skin. In this case, the analyte sensor 91 can monitor the concentration of a specific component in the interstitial fluid, and the sensor control device 92 can transmit the monitoring data to a display instrument which is convenient for the user to read, so that the user can conveniently monitor the health status of certain physiological indexes in real time on a daily basis.

In some examples, the monitored object of the analyte sensor 91 may be glucose. Therefore, the glucose concentration in the body can be conveniently monitored by a user on a daily and real-time basis, so that the occurrence of hypoglycemia and hyperglycemia and related complications of an insulin-dependent diabetic patient can be reduced.

In some examples, the sensor control 92 may include a hole 921 through which the needle tip 80 passes and an engagement hole 922 coupled in engagement with the carriage assembly 20. Thus, the medical device 9 can be coupled to the carrier assembly 20 through the engagement hole 922.

In some examples, the skin-contacting face of the sensor control device 92 can have an adhesive. Thereby, the application of the medical device 9 to the skin surface by adhesion can be facilitated.

In some examples, the portion of the analyte sensor 91 exposed to the sensor control device 92 may be in the form of a thin strip. This can help the analyte sensor 91 to be inserted more easily under the skin and to be in contact with the interstitial fluid more sufficiently.

In some examples, the sensor control device 92 may be in the shape of a block. Thereby, the square inner cavity of the base 13 of the shell 10 can be matched more conveniently. However, the outer shape of the sensor control device 92 is not limited to this, and the sensor control device 92 may have a disk shape, a triangular shape, or an irregular shape. In other examples, the sensor control 92 may have a shape that mates with an internal cavity of the base 13 of the housing 10.

(case)

Fig. 3 is a schematic configuration diagram showing the case according to the present embodiment. Fig. 4 is an exploded view showing the pusher according to the present embodiment. Fig. 5 is a partially enlarged view showing an exploded view of the pusher according to the present embodiment.

As shown in fig. 3 and 4, in the present embodiment, the housing 10 may include a support body 11, an upper cover 12, and a base 13. This facilitates the block processing and assembly of the housing 10, and contributes to reduction of manufacturing cost. In other examples, the housing 10 may be integrally formed. Therefore, the pushing device 1 can have a relatively stable structure.

In the present embodiment, the support body 11 may accommodate the carrying assembly 20, and has a moving rail 112 provided for the carrying assembly 20 and a covering portion 113 covering the base 13. Specifically, one end of the moving rail 112 is connected to the upper cover 12, and the other end is connected to the covering portion 113 covering the base 13. Thereby, movement of the carrier assembly 20 between the proximal position within the housing 10 and the distal surface 111 can be facilitated. In some examples, the motion track 112 has a more elongated shape than the cladding 113. That is, when viewed on a horizontal plane perpendicular to the length direction of the moving rail 112, the length and width of the moving rail 112 are both smaller than the length and width of the coating portion 113 projected on the horizontal plane. Thus, the space occupied by the movement rail 112 can be reduced and the covering thereof by the touch piece 40 can be facilitated.

In the present embodiment, the support body 11 may include a catching arm 114 provided on the moving rail 112. Wherein snap-in arm 114 is releasably engageable with flange 22 of carrier assembly 20, and snap-in arm 114 is engageable with connector 30. In this case, deformation of the connector 30 may cause the two snap arms 114 to spread apart to release the snap arms 114 from engagement with the flange 22, thereby facilitating movement of the carrier assembly 20 from the proximal position to the distal position. Specifically, the connecting member 30 is clamped to the clamping arms 114, and the clamping arms 114 are gathered together to clamp the flange 22, and when the connecting member 30 is pressed from both sides, the connecting member 30 drives the clamping arms 114 to separate towards both sides, so that the flange 22 is separated from the support of the clamping arms 114.

In this embodiment, snap arms 114 allow flange 22 to be disengaged by pushing on connector 30. In this case, the carriage assembly 20 is moved from the proximal position to the distal position by the push driver 50 out of the grip of the housing 10.

In this embodiment, the support body 11 may further comprise a distal end surface 111, wherein the distal end surface 111 is skin-surface contactable. Thereby, it can be facilitated to define the position where the medical device 9 is placed on the skin surface.

In the present embodiment, the upper cover 12 may be connected with a spring 51. In this case, the spring 51 may be positioned between the upper cover 12 and the carrier member 20, whereby the spring 51 can be supported to generate an elastic force to the carrier member 20.

In this embodiment, the base 13 may accommodate the medical device 9. This can help prevent the medical device 9 from being damaged by being touched by a foreign object.

In this embodiment, the base 13 may have a channel with a cross-sectional shape that matches the outer shape of the medical device 9. This can protect the medical device 9 more effectively.

In some examples, the material constituting the parts of the housing 10 may be selected from at least one of plastic, rubber, and metal. In some examples, the material comprising the parts of the housing 10 may be selected from plastics. In some examples, the material constituting the parts of the case 10 may be selected from at least one of ABS, POM, and nylon. In some examples, the parts that make up the housing 10 may be injection molded from plastic. Thereby, the rigidity of the housing 10 can be improved and the manufacturing cost can be reduced.

(touching part)

In the present embodiment, the touch 40 may be disposed outside the case 10 (see fig. 4). In the present embodiment, the touch member 40 may include the button 41, and the button 41 may be elastically deformed. In some examples, there may be two buttons 41. Thereby, it is convenient for the user to operate the pushing device 1 with one hand, i.e. the user can press the button 41 with one hand to start the pushing device 1.

In some examples, the touch button 41 is provided corresponding to the connector 30. Thereby, the touch button 41 can be pressed to deform the connecting member 30.

In some examples, the material of which the part of the touch piece 40 is made may be selected from at least one of plastic, rubber, and metal. In some examples, the material of which the parts of the touch piece 40 are made may be selected from plastics. In some examples, the material of which the part of the touch piece 40 is made may be selected from at least one of ABS, POM, and nylon. In some examples, the parts that make up the touch pad 40 may be injection molded from plastic. This improves the rigidity of the touch material 40 and reduces the manufacturing cost.

(attachment)

In this embodiment, the connecting member 30 may be deformed by the pressing of the touching member 40 to release the engagement of the carrying assembly 20 with the housing 10. The carriage assembly 20 can thereby be moved from the proximal position to the distal position by the pusher drive 50.

In this embodiment, the connector 30 may be connected to the snap arm 114. In some examples, the connectors 30 are arranged around the periphery of the movement track 112 in an encircling manner. In some examples, the connector 30 has two connecting arms with an L-shape and is fitted with protrusions on the snap-fit arms 114 through holes in the connecting arms. In other examples, the connecting arm may snap onto a snap arm 114 (see fig. 5) on a side remote from the side on which the connecting arm is located. In this case, when the connecting member 30 is deformed by being pressed by the button 41, the connecting arms move in the direction of the pressing force, which causes the two connecting arms to move away from each other, which opens the snap-in arms 114 and causes the flange 22 to disengage from the snap-in arms 114, so that the snap-in of the housing 10 to the carrying assembly 20 can be released.

In some examples, the material of which the parts of the connector 30 are made may be selected from at least one of plastic, rubber, and metal. In some examples, the material comprising the components of the connector 30 may be selected from plastics. In some examples, the material of which the parts of the connector 30 are made may be selected from at least one of ABS, POM, and nylon. In some examples, the parts that make up the connector 30 may be injection molded from plastic. Thereby, the rigidity of the connector 30 can be improved and the manufacturing cost can be reduced. In some examples, the material comprising the components of the connector 30 may be selected from steel alloys. Thereby, the elasticity and strength of the connector 30 can be improved.

(push drive)

In this embodiment, the push driving member 50 may have a spring 51 having both ends respectively contacting the housing 10 and the carrying assembly 20. In some examples, the push drive 50 may be a compression spring. In this case, when the clamping of the housing 10 to the carrier assembly 20 is released, the carrier assembly 20 can be moved from the proximal position to the distal position under the urging of the spring 51, so that the medical device 9 can be applied to the skin surface.

In some examples, the push drive 50 may be a pneumatic actuator. Thereby, the speed of the push can be controlled more effectively.

Fig. 6 is a further exploded view showing the pusher according to the present embodiment. Fig. 7 is an exploded view showing a conveyance module according to the present embodiment. Fig. 8 is an exploded view showing the carrier module and the needle tip support section according to the present embodiment.

(conveyance Assembly)

As shown in fig. 6 and 7, in the present embodiment, the carrying assembly 20 may include a carrying body 21, a flange 22, a push joint 23, a coupling member 24, and a joint member 25.

In the present embodiment, the carrying body 21 is configured as a main support of the carrying assembly 20, which houses the needle tip support section 60 and provides the needle tip support section 60 with the movement track 112. Thereby, the movement of the needle tip support portion 60 between the proximal position and the distal position can be facilitated.

In some examples, the carrying body 21, the flange 22 and the engaging piece 25 may be integrally formed.

This can reduce the manufacturing cost.

In some examples, the material constituting the parts of the carrying body 21, the flange 22 and the joint 25 may be selected from at least one of plastic, rubber and metal. In some examples, the material of which the parts of the carrying body 21, the flange 22 and the engaging member 25 are made may be selected from plastics. In some examples, the material constituting the parts of the carrying body 21, the flange 22, and the engaging piece 25 may be selected from at least one of ABS, POM, and nylon. In some examples, the parts that make up the carrying body 21, the flange 22 and the engaging member 25 may be injection molded from plastic. Thereby, the rigidity of the carrier assembly 20 can be improved and the manufacturing cost can be reduced. In the present embodiment, the pushing contact 23 can contact the spring 51, and thereby can transmit the elastic force of the spring 51 to the conveying body 21.

In this embodiment, the carrier assembly 20 may be coupled together by the coupling 24 and the needle tip support 60. Thereby, the needle tip support 60 can be moved from the proximal position to the distal position following the carrier assembly 20.

In this embodiment, the delivery assembly 20 may be engaged with the medical device 9 by an engagement member 25. Thereby, the medical instrument 9 can be moved from the proximal position to the distal position under the pushing of the carrier assembly 20.

(joining Member)

In the present embodiment, the engagement member 25 may include an engagement surface 251 and a protrusion 252.

In the present embodiment, the engagement face 251 is in contact with the sensor control device 92 of the medical instrument 9, and the protrusion 252 is inserted into an engagement hole 922 provided in the sensor control device 92. Thereby, the medical device 9 can be moved from the proximal position to the distal position under the pushing of the carrying body 21.

In this embodiment, the engagement member 25 releases the engagement of the delivery assembly 20 with the medical device 9 when the delivery assembly 20 is moved from the proximal position to the distal position. In this case, the medical device 9 can be detached from the delivery assembly 20 so that the state of application to the skin can be maintained.

In some examples, the engagement face 251 and the protrusion 252 may be integrally formed. This can reduce the manufacturing cost.

In some examples, the material of which the engagement surface 251 and the projection 252 are formed may be selected from at least one of plastic, rubber, and metal. In some examples, the material of which the engagement surface 251 and the projection 252 are formed may be selected from plastics. In some examples, the material of which the engagement face 251 and the projection 252 are composed may be selected from at least one of ABS, POM, and nylon. In some examples, the parts that make up the engagement face 251 and the protrusion 252 may be injection molded from plastic. Thereby, the rigidity of the joint 25 can be improved and the manufacturing cost can be reduced.

In other examples, the engagement surface 251 and the protrusion 252 may each be composed of different materials. In this case, the engagement surface 251 may be made of a harder material (e.g., plastic) to increase the rigidity of the engagement surface 251, and the protrusion 252 may be made of a softer material (e.g., rubber) to improve the engagement of the protrusion 252 with the engagement hole 922 provided in the sensor control device 92.

(needle tip support)

In this embodiment, the pushing device 1 may further comprise a needle tip support 60 supporting the needle tip 80 and configured to be movable between a proximal position and a distal position within the housing 10, the needle tip support 60 being releasably coupled to the carrier assembly 20 by the coupling 24. Thus, the needle tip support 60 may carry the needle tip 80 between the proximal and distal positions.

In some examples, the needle tip support 60 may engage the needle tip 80 in a click-on manner. This facilitates loading of the needle tip 80 on the needle tip support section 60.

(needle tip)

In this embodiment, the needle tip 80 may be provided with a needle groove 81 having an opening, the needle tip 80 passes through a hole 921 provided on the medical instrument 9, and the analyte sensor 91 is placed in the needle groove 81. In this case, the needle tip 80 can penetrate the skin and subcutaneous tissue and place the analyte sensor 91 in the subcutaneous tissue during withdrawal, thereby allowing the analyte sensor 91 to remain in interstitial fluid and make sufficient contact.

In this embodiment, when the needle tip support 60 is moved from the proximal position to the distal position, the needle tip 80 may be inserted below the skin surface and place the analyte sensor 91 in contact with interstitial fluid and cause the sensor control device 92 to be applied to the skin surface. In this case, the analyte sensor 91 can monitor the concentration of a specific component in the interstitial fluid, and the sensor control device 92 can transmit the monitoring data to a display instrument which is convenient for the user to read, so that the user can conveniently monitor certain physiological indexes of the user in real time on a daily basis.

In some examples, the material of needle tip 80 may be selected from stainless steel. This can help the needle tip 80 to better penetrate the skin and subcutaneous tissue.

(withdrawing driving piece)

In this embodiment, the pushing device 1 further comprises a retraction drive 70, the retraction drive 70 being arranged between the carrier assembly 20 and the needle tip support 60 to move the needle tip support 60 from the distal position to the proximal position when the carrier assembly 20 reaches the distal position. In this case, after the insertion and application actions are completed, the needle tip support 60 may be returned from the distal position to the proximal position by the retraction drive 70, thereby enabling the needle tip 80 to be withdrawn from the body.

In the present embodiment, the retracting drive 70 has a spring 71 having both ends contacting the carrying assembly 20 and the needle tip supporting part 60, respectively. In some examples, the retraction driver 70 may be a compression spring. In this case, after the insertion and application actions are completed, the needle tip support section 60 may be returned from the distal position to the proximal position under the urging of the spring 71, thereby enabling the needle tip 80 to be extracted from the body.

(biasing member)

In this embodiment, the housing 10 includes a biasing member 131, and when the carrying assembly 20 moves from the proximal position to the distal position, the biasing member 131 contacts the coupling member 24 to release the coupling of the carrying assembly 20 to the needle tip support 60. In this case, after the insertion and application actions are completed, the needle tip support 60 may be automatically disengaged from the carrier assembly 20, returned from the distal position to the proximal position by the retraction drive 70, and the needle tip 80 may be withdrawn from the body.

In some examples, the biasing member 131 may be two arm-like structures disposed on the base 13. Thereby, the biasing member 131 can be helped to push against the card 242 to release the clamping of the elastic buckle 241 to the needle point support part 60.

(coupling piece)

In this embodiment, the coupling 24 includes a resilient clasp 241 releasably engageable with the needle tip support 60 and a card 242 engageable with the resilient clasp 241. In this case, the elastic buckle 241 couples the needle tip support section 60 to the carrier body 21 under the clamping of the card 242, thereby enabling the needle tip support section 60 to move from the proximal position to the distal position following the carrier body 21.

In the present embodiment, the biasing member 131 touches the card 242 and releases the engagement of the card 242 with the elastic buckle 241 so as to release the coupling of the carrying assembly 20 to the needle tip supporting portion 60. In this case, the biasing member 131 releases the coupling of the carrier assembly 20 to the needle tip support 60, and the needle tip support 60 can be returned from the distal position to the proximal position by the retraction drive 70, thereby enabling the needle tip 80 to be withdrawn from the body.

In some examples, the material constituting the parts of the elastic buckle 241 and the card 242 may be selected from at least one of plastic and metal. In some examples, the material of which the parts of the resilient clasp 241 and card 242 are made may be selected from steel alloys. This improves the elasticity and strength of the elastic buckle 241 and the card 242.

In this embodiment, when the needle tip support 60 is in the proximal position, the needle tip 80 is completely covered by the housing 10. In this case, the needle tip 80 may be protected from being deformed or contaminated by contact with a foreign object by the housing 10, and the needle tip 80 may be invisible to a user, so that safety and comfort of the push device 1 can be improved.

Fig. 10 is a sectional view showing an initial state of the pushing device according to the present embodiment. Fig. 11 is a sectional view showing the completion of pushing by the pushing device according to the present embodiment. Fig. 12 is a sectional view showing the pusher according to the present embodiment after the needle tip is retracted.

In this embodiment, the user pressing button 41 may press connector 30 to deform to release the snap fit of snap arms 114 provided on housing 10 against flanges 22 provided on carrier assembly 20, carrier body 21 is moved from the proximal position to the distal position under the urging of spring 51, analyte sensor 91 is inserted through needle tip 80 to a position under the skin in contact with interstitial fluid, and sensor control 92 is applied to the skin surface. When the carrying body 21 moves from the proximal position to the distal position, the biasing member 131 provided on the base 13 touches the card 242 and releases the engagement of the card 242 with the elastic buckle 241 to release the restriction of the elastic buckle 241 on the needle point support 60, and the needle point support 60 moves from the distal position to the proximal position with the needle point 80 under the urging of the spring 71.

While the present invention has been described in detail in connection with the drawings and the embodiments, it should be understood that the above description is not intended to limit the present invention in any way. Those skilled in the art can make modifications and variations to the present invention as needed without departing from the true spirit and scope of the invention, and such modifications and variations are within the scope of the invention.

Claims

1. A pusher device for a medical instrument, characterized by: the skin-care device comprises a shell, a conveying assembly, a connecting piece, a touch piece and a pushing driving piece, wherein the shell is provided with a far-end surface close to the surface of skin, the shell is provided with a supporting main body which is used for accommodating the conveying assembly and providing a motion track for the conveying assembly, the supporting main body is provided with two clamping arms which are positioned on the same side of the conveying assembly and mutually gathered along the direction orthogonal to the motion track, and the conveying assembly is releasably clamped with the two gathered clamping arms; the transport assembly is configured to be movable along the motion track between a proximal position and a distal position within the housing, the transport assembly including an engagement member for engaging the medical instrument; the connecting piece is matched with the shell, the connecting piece is arranged on the periphery of the moving track in an encircling manner, the connecting piece is provided with two connecting ends which are respectively arranged on two opposite sides of the moving track along the direction which is orthogonal to the moving track and two connecting arms which respectively extend towards opposite sides from the two connecting ends and are L-shaped, the two connecting arms and the two clamping arms are arranged on the same side of the conveying component and are respectively connected with the clamping arms which are positioned on the opposite sides, and when the connecting piece deforms due to extrusion of the connecting ends, the connecting arms move along the direction of pressure force so that the two clamping arms which are gathered together move back to back; the touch member is disposed outside the housing, the touch member includes a button linked with the connection end of the connection member, and the carrying assembly is released from the housing by pressing the button of the touch member; the pusher drive is disposed between the carriage assembly and the housing to move the carriage assembly from the proximal position to the distal position when the carriage assembly is released from the housing.

2. The pushing device of claim 1, wherein:

the medical device includes an analyte sensor in contact with subcutaneous interstitial fluid and a sensor control device located at the skin surface.

3. The push device of claim 2, wherein:

the monitored object of the analyte sensor is glucose.

4. The pushing device of claim 1, wherein:

the push driving member has a spring having both ends respectively contacting the housing and the carrying assembly.

5. The push device of claim 2, wherein:

the pushing device further comprises a needle tip support for supporting a needle tip and configured to be movable within the housing between a proximal position and a distal position, the needle tip support being releasably coupled to the carrier assembly by a coupling.

6. The pushing device of claim 5, wherein:

the pushing device further comprises a withdrawing driving piece, and the withdrawing driving piece is arranged between the conveying assembly and the needle tip supporting portion.

7. The pushing device of claim 6, wherein:

the withdrawing driving piece is provided with a spring, and two ends of the spring are respectively contacted with the conveying assembly and the needle point supporting part.

8. The pushing device of claim 6, wherein:

the housing includes a biasing member that contacts the coupling member and releases the coupling of the carriage assembly to the needle tip support when the carriage assembly moves from the proximal position to the distal position.

9. The pushing device of claim 8, wherein:

the coupling piece including with the needle point supporting part releasable joint detain and with the card of elasticity knot joint.

10. The push device of claim 9, wherein:

the biasing piece touches the card and releases the clamping connection between the card and the elastic buckle.

11. The pushing device of claim 1, wherein:

the engagement member releases the coupling to the medical instrument when the transport assembly moves from the proximal position to the distal position.

12. The pushing device of claim 5, wherein:

when the needle tip support is in the proximal position, the needle tip does not extend beyond the distal surface.

13. The pushing device of claim 5, wherein:

the needle tip is provided with a needle slot having an opening, the needle tip passes through a hole provided on the medical instrument, and the analyte sensor is placed within the needle slot.

14. The pusher of claim 13, wherein:

when the needle tip support is moved from the proximal position to the distal position, the needle tip is inserted below the skin surface and places the analyte sensor in contact with interstitial fluid, and the sensor control device is applied to the skin surface.