JP6553428B2 - Puncture device - Google Patents

Description

  The present invention relates to a puncture device used for collecting body fluid such as blood.

  Conventionally, measuring instruments that measure specific components such as glucose and cholesterol contained in body fluids such as blood have been used. In this measurement, it is necessary to collect a predetermined amount of body fluid such as the patient's blood. As a device for collecting this body fluid, a puncture device having a puncture element has been proposed. The puncture device disclosed in Patent Document 1 includes a puncture cartridge having a puncture element, and an instrument body loaded with the puncture cartridge. The puncture cartridge is configured as a so-called disposable type that is discarded after being collected once or a predetermined number of times.

  The puncture cartridge has a function of accurately arranging the puncture element at a desired position with respect to the instrument body and a function of appropriately releasing the fixation of the puncture element when the puncture element is moved to puncture the patient's body. Desired. That is, the instrument main body is provided with an elastic member or the like that exerts a driving force when puncturing the puncture element. It is desirable that the puncture element is fixed in the puncture cartridge until the puncture cartridge is loaded into the instrument body. On the other hand, when the puncturing element punctures by the propulsive force from the elastic member, it is desirable that the puncturing element in the puncturing cartridge be easily moved. If fixation in the puncture cartridge is too strong, it is difficult to keep the puncture element in a state where it can be easily moved. On the other hand, if the fixation in the puncture cartridge is too weak, the propulsive force from the elastic member may not be reliably transmitted to the puncture element.

JP, 2013-121380, A

  The present invention has been conceived under the circumstances described above, and at the time of loading, the position of the puncture element in the puncture cartridge is more accurately defined, and at the time of puncture, the puncture element is appropriately moved. It is an object of the present invention to provide a puncturing device that can be used.

  A puncture device provided by the present invention is attached to a puncture cartridge having a puncture mobile body having a puncture element, a cartridge case for housing the puncture mobile body, a main body case loaded with the puncture cartridge, and the main body case. A puncture device having an elastic member that exhibits an elastic force for moving the puncture moving body toward a puncture target, wherein the puncture moving body includes a moving side engaging portion. The cartridge case has a fixed-side engaging portion for fixing the puncture moving body to the cartridge case by engaging with the moving-side engaging portion, and the instrument body In the loading direction in which the puncture cartridge is loaded into the main body, elastic deformation of the elastic member by the puncture cartridge starts When the puncturing cartridge is positioned in a section leading to the engagement release position set on the rear side in the loading direction with respect to the sexual deformation start position, engagement between the moving engagement portion and the fixed engagement portion It has an engagement maintenance part which maintains a joint.

  In a preferred embodiment of the present invention, the force for elastically deforming the elastic member by the puncturing cartridge is transmitted through an engagement portion between the movable engagement portion and the fixed engagement portion.

  In a preferred embodiment of the present invention, the engagement maintaining portion moves in the section from the engagement maintenance start position located on the near side in the loading direction to the engagement release position from the elastic deformation start position. The engagement between the side engagement portion and the fixed side engagement portion is maintained.

  In a preferred embodiment of the present invention, a part of one of the moving side engaging part and the fixed side engaging part enters the other in a direction crossing the puncturing direction, and the engagement maintaining part The engagement between the movable engagement portion and the fixed engagement portion is maintained by preventing a part of the cartridge case from being deformed in the direction intersecting the puncture direction.

  In a preferred embodiment of the present invention, a part of one of the moving side engaging part and the fixed side engaging part enters the other in a direction crossing the puncturing direction, and the engagement maintaining part The engagement between the movable engagement portion and the fixed engagement portion is maintained by preventing the movable engagement portion from being deformed in a direction intersecting the puncture direction.

  In a preferred embodiment of the present invention, the engagement maintaining portion takes an engagement attitude engaging with the moving side engaging portion, and a non-engaging attitude not engaging with the moving side engaging portion. It has an engagement movable element, and a guide element which causes the engagement movable element to assume the engagement attitude during a period until the puncture cartridge reaches the disengagement position.

  In a preferred embodiment of the present invention, the device main body is configured so that the elastic member does not maintain the engagement between the movable engagement portion and the fixed engagement portion. A latch portion for temporarily maintaining the elastic deformation of the.

  In a preferred embodiment of the present invention, the puncture cartridge has a cap portion which covers the puncture element and is connected to the puncture mobile body, and the device main body is configured to be movable relative to the engagement release position. There is a separation part that separates the cap part from the puncture moving body by contacting the cap part on the front side in the puncture direction.

  According to one aspect of the present invention, when the puncture cartridge is on the near side in the loading direction with respect to the engagement release position, engagement between the movable engagement portion and the fixed engagement portion by the engagement maintaining portion. The match is maintained. For this reason, even if the force accompanying loading of the puncture cartridge acts on the puncture moving body, the position of the puncture moving body is appropriately fixed with respect to the cartridge case. On the other hand, when the puncture cartridge reaches the disengagement position, the engagement maintaining part does not maintain the engagement between the moving side engaging part and the fixed side engaging part, and the moving side engaging part And the fixed engagement portion are disengaged. Thereby, the puncturing moving body can be smoothly moved without being restrained by the cartridge case. Therefore, at the time of loading, the position of the puncture element in the puncture cartridge can be more accurately defined, and at the time of puncture, the puncture element can be appropriately moved in the puncture cartridge.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

1 is a perspective view of a puncture device according to a first embodiment of the present invention. It is sectional drawing of the state which isolate | separated the puncture cartridge and instrument main body in the cross section along the II-II line | wire of FIG. It is sectional drawing which shows loading of a puncture cartridge in the puncture device of FIG. FIG. 2 is a cross-sectional view showing a state in which the puncture cartridge is in an elastic deformation start position in the puncture device of FIG. 1. FIG. 2 is a cross-sectional view showing a state where the puncture cartridge is in the disengagement position in the puncture device of FIG. 1. It is sectional drawing which shows the state which the puncture preparation was ready in the puncture device of FIG. It is sectional drawing which shows the state which punctures in the puncture device of FIG. It is sectional drawing of the state which isolate | separated the puncture cartridge and instrument main body of the puncture device based on 2nd Embodiment of this invention. It is a front view which shows the engagement maintenance part of the puncture device of FIG. It is sectional drawing which shows loading of the puncture cartridge in the puncture device of FIG. FIG. 9 is a cross-sectional view showing a state where the puncture cartridge is in the elastic deformation start position in the puncture device of FIG. 8. FIG. 9 is a cross-sectional view showing a state where the puncture cartridge is in the disengagement position in the puncture device of FIG. 8. FIG. 9 is a cross-sectional view showing a state in which preparation for puncturing is completed in the puncture device of FIG. 8; It is sectional drawing which shows the state which punctures in the puncture device of FIG. It is sectional drawing of the state which isolate | separated the puncture cartridge and instrument main body of the puncture device based on 3rd Embodiment of this invention. FIG. 16 is a cross-sectional view showing the loading of a puncture cartridge in the puncture device of FIG. 15; FIG. 16 is a cross-sectional view showing a state where the puncture cartridge is in the engagement start position in the puncture device of FIG. 15. FIG. 16 is a cross-sectional view showing a state where the puncture cartridge is in the elastic deformation start position in the puncture device of FIG. 15. FIG. 16 is a cross-sectional view showing a state where the puncture cartridge is in the disengagement position in the puncture device of FIG. 15. FIG. 16 is a cross-sectional view showing a state in which preparation for puncturing is completed in the puncture device of FIG. 15; It is sectional drawing which shows the state which punctures in the puncture device of FIG.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  1 and 2 show a puncture device according to a first embodiment of the present invention. The puncture device A1 of this embodiment includes a device body 1 and a puncture cartridge 2. The puncture device A1 is used to collect blood, which is a sample to be measured by, for example, a self monitoring of blood glucose (SMBG), from a fingertip or the like of a patient.

  In FIG. 2, the vertical direction in the figure is the loading direction N, and the lower side in the figure is defined as the rear side in the loading direction N and the upper side in the figure is defined as the front side in the loading direction N. Further, in the present embodiment, the direction in which the puncturing movable body 3 described later moves during puncturing is a direction along the loading direction N, and the loading direction N moves toward the near side. In the present invention, the loading direction and the puncturing direction may coincide with each other or may be different directions.

  The puncture cartridge 2 is a cartridge that can be punctured by the puncture device A1 by being loaded into the device body 1. The puncture cartridge 2 of this embodiment is constituted by a puncture moving body 3, a cartridge case 4, and a cap portion 5. The puncture cartridge 2 is configured as a so-called disposable that is discarded after one or a predetermined number of punctures.

  The cartridge case 4 accommodates the puncture moving body 3 and the cap portion 5 and constitutes most of the appearance of the puncture cartridge 2. The shape, size, and material of the cartridge case 4 are not particularly limited. In this embodiment, the cartridge case 4 has a substantially cylindrical shape that defines a space in which the puncture moving body 3 and the cap portion 5 are built. For example, a rectangular cylindrical shape or a cylindrical shape may be employed as the cylindrical specific form. As a material of cartridge case 4, resin is mentioned, for example.

  In the cartridge case 4, a fixed side engaging portion 41, a puncture port 42 and a stopper portion 43 are formed. The fixed side engaging portion 41 has a function of fixing the puncturing moving body 3 to the cartridge case 4 by engaging with a part of the puncturing moving body 3. In the present embodiment, the fixed side engaging portion 41 is provided on the inner side surface of the cylindrical cartridge case 4 and is a concave portion which is recessed in the lateral direction in the drawing.

  The puncture port 42 is provided at the end in the loading direction N front side of the cartridge case 4 and is an opening penetrating in the loading direction N. The puncture port 42 is provided for projecting a puncture element 31 (described later) of the puncture moving body 3 to the outside.

  The stopper portion 43 is provided near the front end of the cartridge case 4 in the loading direction N, and protrudes inward from the inner side surface of the cartridge case 4 in the lateral direction in the drawing. The stopper portion 43 is for preventing the puncture moving body 3 from moving to a punctureable state in an unintended state by colliding with a part of the puncture moving body 3.

  The puncture moving body 3 is a part that moves toward a part of a patient's body from which bodily fluids are to be collected in the puncture by the puncture device A1. In the present embodiment, the puncture moving body 3 includes a puncture element 31 and a holding portion 32. The puncture element 31 is an element that is punctured into the body, and is, for example, a needle or blade made of metal. The puncture element 31 has a sharp shape toward the loading direction N front side (forward in the puncture direction), and a needle is preferably used.

  The holding portion 32 is a portion for holding the puncture element 31 and is made of, for example, a resin. The holding part 32 is located behind the tip of the puncture element 31 in the loading direction N (backward in the puncture direction). The holding portion 32 of the present embodiment includes a moving side engaging portion 321, a rear end protrusion 322, and an overhang portion 323.

  The moving side engaging portion 321 has a function of fixing the puncture moving body 3 to the cartridge case 4 by engaging with the fixed side engaging portion 41 of the cartridge case 4. In the present embodiment, the moving side engaging portion 321 is configured by a portion of the holding portion 32 that protrudes in the left-right direction in the drawing, which is a direction intersecting the loading direction N. Further, the tip end of the movable engagement portion 321 enters the fixed engagement portion 41 formed as a recess in the lateral direction in the drawing which is a direction intersecting the loading direction N.

  In addition, engagement of the movement side engagement part 321 and the fixed side engagement part 41 is not limited to the aspect of this embodiment. For example, a configuration in which the distal end of the fixed side engaging portion 41 enters the moving side engaging portion 321 by making the distal end of the moving side engaging portion 321 a concave portion may be adopted.

  The rear end protrusion 322 protrudes toward the back in the loading direction N. The rear end projection 322 is a portion connected to a part of the instrument main body 1 described later.

  The overhang portion 323 is configured by a portion of the holding portion 32 that overhangs in the left-right direction in the drawing. More specifically, the overhanging portion 323 of the present embodiment has a portion extending obliquely upward to the left in the drawing and a portion extending from the tip of this portion to the near side in the loading direction N. The overhanging portion 323 is for preventing the puncturing element 31 of the puncturing moving body 3 from unintentionally protruding from the puncturing cartridge 2 when discarded, for example, after use. That is, when the puncture cartridge 2 is not loaded in the instrument body 1 as shown in FIG. 2, the puncture element 31 is punctured when the puncture moving body 3 tries to move forward in the loading direction N (forward in the puncture direction). Before protruding from the opening 42 to the outside, the tip of the overhang portion 323 collides with the stopper portion 43 of the cartridge case 4. Thereby, the movement of the puncture moving body 3 is blocked, and it is possible to prevent the puncture element 31 from protruding accidentally.

  The cap portion 5 is for keeping the puncture element 31 in a sterile state by covering the puncture element 31 when not in use. The cap unit 5 of the present embodiment is connected to the holding unit 32 of the puncture moving body 3 via the connecting unit 51. Furthermore, in this embodiment, the holding | maintenance part 32, the connection part 51, and the cap part 5 are integrally formed by what is called insert molding which resin-molds in the state which has arrange | positioned the puncture element 31 in the metal mold | die. The connecting portion 51 securely connects the holding portion 32 and the cap portion 5 when not in use, and has a size and shape which can be broken so as to properly separate the cap portion 5 from the holding portion 32 in a process described later. ing.

  In addition, you may employ | adopt the puncture moving body 3 in which the puncture element 31 and the holding part 32 were integrally formed. In this case, the puncturing moving body 3 may be formed of metal, or may be formed of resin on the condition that puncturing by the puncturing element 31 can be appropriately performed.

  The instrument body 1 is loaded with the puncture cartridge 2 and occupies most of the appearance of the puncture instrument A1. The instrument body 1 of the present embodiment has a body case 6, an elastic member 7 and a latch portion 81.

  The main body case 6 holds the elastic member 7 and the like, and is a portion for supporting the inserted puncture cartridge 2. In the present embodiment, the main body case 6 is formed in a cylindrical shape that is open on the near side in the loading direction N as a whole, and the puncture cartridge 2 is loaded toward the inner space thereof. However, the configuration of the main body case 6 is not limited to this, and any configuration that can appropriately hold the puncture cartridge 2 to be loaded may be used. Main body case 6 is made of, for example, a resin.

  The main body case 6 has an engagement maintaining portion 63 and a guide portion 62.

  The engagement maintaining part 63 is configured by a part of the main body case 6 or another member attached to the main body case 6. The engagement maintaining portion 63 is in a section up to the engagement release position set in the loading direction N behind the elastic deformation start position where the elastic deformation of the elastic member 7 by the puncture cartridge 2 starts in the loading direction N. When the puncture cartridge 2 is positioned, the engagement between the moving side engaging portion 321 and the fixed side engaging portion 41 is reinforced and maintained. In the present embodiment, the engagement maintaining portion 63 is a member having a left side surface in the drawing along the loading direction N.

  The guide portion 62 is a member extending along the loading direction N, and is configured of a part of the main body case 6 or a separate member attached to the main body case 6. The guide portion 62 is a portion that provides a surface on which the overhanging portion 323 which is contracted and contracted when the puncture cartridge 2 is loaded when the puncture cartridge 2 is loaded. Further, the guide portion 62 has a separation portion 621. The separation unit 621 functions to separate the cap unit 5 from the holding unit 32 by coming into contact with the cap unit 5 of the puncture cartridge 2 in a process described later in loading the puncture cartridge 2.

  The elastic member 7 exerts an elastic force to move the puncturing moving body 3 of the puncturing cartridge 2 to the front in the puncturing direction (the loading direction N side). The specific configuration of the elastic member 7 is not particularly limited, and a so-called string-wound spring is employed in the present embodiment. The loading direction N rear end of the elastic member 7 is fixed to the main body case 6. In the present embodiment, a connecting portion 71 is provided at the front end N in the loading direction of the elastic member 7. The connecting portion 71 has a function of temporarily integrating the puncturing moving body 3 and the elastic member 7 by connecting with the rear end projection 322 of the puncturing moving body 3. Connecting portion 71 is made of, for example, metal or resin.

  The connecting portion 71 is formed with a connecting recess 711 and a latch recess 712. The connection recess 711 is recessed in the loading direction N and is a portion into which the rear end protrusion 322 of the puncturing moving body 3 is fitted. The latch recess 712 is a portion that is recessed in the left-right direction in the figure, which is a direction in which a part of the connection recess 711 intersects the loading direction N.

  The latch portion 81 is for temporarily stopping the connection recess 711 at a desired position in a state where the elastic member 7 can exert an elastic force. The specific configuration of the latch portion 81 is not particularly limited, and in the present embodiment, the latch portion 81 is formed of a member pointed to the left in the drawing. The latch portion 81 may be set at a position where the connection recess 711 is stopped by a user operation. In a process to be described later, the latch portion 81 stops the connecting portion 71 by entering the latch recess 712 of the connecting portion 71. The configuration including the latch recess 712 and the latch portion 81 is only an example of a specific structure for temporarily stopping the connection portion 71, and various known structures can be adopted as a structure for achieving the same purpose.

  Next, puncturing using the puncture device A1 will be described below with reference to FIGS.

  FIG. 2 shows the use start state of the puncture device A1. The puncture cartridge 2 is not used yet. For this reason, the moving side engaging portion 321 of the puncture moving body 3 and the fixed side engaging portion 41 of the cartridge case 4 are gently engaged, and the puncture moving body 3 is fixed to the cartridge case 4. . Further, the cap part 5 is formed integrally with the holding part 32 via the connecting part 51. The puncture cartridge 2 is arranged on the front side N in the loading direction of the instrument main body 1 and, if necessary, the angle of the puncture cartridge 2 with respect to the instrument main body 1 is adjusted.

  Next, loading of the puncture cartridge 2 into the instrument body 1 is started. Specifically, the puncture cartridge 2 is moved in the loading direction N back with respect to the instrument body 1. As a typical loading method, the main body case 6 of the instrument main body 1 is fixed by being held by one hand of the user, and the puncture cartridge 2 is loaded while holding the cartridge case 4 of the puncture cartridge 2 by the other hand. Move toward the back in direction N.

  As loading proceeds, the state shown in FIG. 3 is obtained. In the state shown in the figure, the engagement maintaining portion 63 of the instrument main body 1 and the lower right portion of the cartridge case 4 in the drawing are adjacent to each other. As a result, the engagement maintaining portion 63 prevents the deformation of the lower right portion of the cartridge case 4 in the drawing, that is, the portion provided with the fixed side engaging portion 41 in the horizontal direction in the drawing. As a result, the engagement between the moving side engaging portion 321 and the fixed side engaging portion 41 is maintained.

  Also, in the same figure, the separation part 621 of the guide part 62 of the instrument body 1 abuts on the cap part 5 of the puncture cartridge 2. Under the present circumstances, the puncture cartridge 2 is located in the loading direction N side rather than the engagement cancellation | release position mentioned later. Moreover, in this embodiment, the elastic member 7 of the instrument main body 1 is a state which has not yet exhibited the elastic force. When moving the puncture cartridge 2 in the loading direction N while holding the cartridge case 4, the force applied from the user's hand is determined by the cartridge side 4 of the fixed side engaging portion 41 and the movable side engaging portion 321. It is transmitted to the holding part 32 of the puncture moving body 3 via the engaging part. For this reason, when the puncture cartridge 2 is further moved to the back side in the loading direction N from the state shown in FIG. 3, the cap portion 5 is moved to the back side in the loading direction N by the guide portion 62 (separating portion 621). The holding part 32 will move to the loading direction N back | inner side in the blocked state. Thereby, a remarkably big stress generate | occur | produces in the connection part 51 which connects the holding | maintenance part 32 and the cap part 5, and the connection part 51 fractures | ruptures. Thereby, the cap portion 5 is separated from the holding portion 32.

  FIG. 4 shows a state in which the puncture cartridge 2 is further moved to the back side in the loading direction N and is at the elastic deformation start position. The elastic deformation start position is a position where the elastic deformation of the elastic member 7 starts when the puncture cartridge 2 is loaded. In this embodiment, the rear end protrusion 322 of the puncture moving body 3 of the puncture cartridge 2 fits into the connection recess 711 of the connection portion 71, so that the puncture movement body 3 pushes the connection portion 71 toward the back in the loading direction N. The position to be obtained is the elastic deformation start position. The puncture cartridge 2 may be configured to reach the elastic deformation start position prior to the contact between the separation unit 621 and the cap unit 5 described above.

  Further, in the process of progressing from the state shown in FIG. 3 to the state shown in FIG. 4, the movement of cap portion 5 in the loading direction N back side is still blocked by guide portion 62 (separation portion 621). . For this reason, the cap unit 5 is configured to move relative to the puncture moving body 3 and the cartridge case 4 in the loading direction N front side. In the relative movement with respect to the puncture moving body 3 and the cartridge case 4, for example, by adopting a known structure in which a predetermined guide is provided in the cartridge case 4, the cap portion 5 can be used in the subsequent puncture. It is configured to be retracted from the puncturing start of the puncturing movable body 3 (puncturing element 31). The retraction of the cap unit 5 is not limited to that realized by the structure of the cartridge case 4, and may be configured such that the user removes it at any timing, for example.

  When the puncture cartridge 2 is further moved from the state shown in FIG. 4 toward the back side in the loading direction N, the elastic member 7 is elastically deformed according to the moving distance (loading distance), so that the elastic force of the elastic member 7 increases. . In order to move the puncture cartridge 2 in the loading direction N in this moving process (loading process), a force that can resist the elastic force of the elastic member 7 from the user's hand to the cartridge case 4 of the puncture cartridge 2 Is added. This force is applied to the engagement portion between the moving side engaging portion 321 of the puncturing moving body 3 and the fixed side engaging portion 41 of the cartridge case 4. The engagement portion between the movable engagement portion 321 and the fixed engagement portion 41 is engaged even if a force more than the elastic force of the elastic member 7 is applied by the deformation prevention of the cartridge case 4 by the engagement maintenance portion 63. It is maintained in the same state.

  Then, as shown in FIG. 5, the puncture cartridge 2 reaches the disengagement position. The engagement release position is a state in which the engagement maintaining portion 63 does not maintain the engagement between the moving engagement portion 321 and the fixed engagement portion 41. Thus, the movement engagement portion 321 and the fixed engagement portion are formed. This is the position where the engagement with 41 is released. In the present embodiment, as a result of the puncture cartridge 2 being moved to the back side in the loading direction N, the lower right portion of the cartridge case 4 where the fixed side engaging portion 41 is provided is the engagement maintaining portion. It is located in the loading direction N back side with respect to 63 loading direction N back side end. For this reason, deformation of the lower right portion of the cartridge case 4 in the drawing is allowed, and the portion is deformed outward in the left-right direction in the drawing. As a result, the engagement between the movable engagement portions 321 and 41 is released.

  When the engagement is released, the puncture moving body 3 tries to move to the front side in the loading direction N (forward in the puncture direction) by receiving the elastic force of the elastic member 7. In the present embodiment, as shown in FIG. 6, the puncture moving body 3 is closer to the loading direction N (the puncturing direction) than the position where the puncture moving body 3 was located when the puncture cartridge 2 was in the disengaged position. When moving forward), the latch portion 81 fits into the latch recess 712 of the connecting portion 71 and temporarily prevents the connecting portion 71 and the puncture moving body 3 from moving. The position of the latch portion 81 in the loading direction N may be arbitrarily changeable by the user. The operation of fitting the latch portion 81 into the latch recess 712 may be automatically executed by a known mechanism (not shown) or may be executed by a user operation. Thereby, puncture device A1 will be in the state which can puncture.

  Thereafter, the puncture port 42 of the cartridge case 4 is brought close to a body location where body fluid such as blood is to be collected. Next, for example, by operating an operation portion (not shown) provided in the instrument body 1, the movement prevention of the connecting portion 71 by the latch portion 81 is released. Thereby, as shown in FIG. 7, the puncturing moving body 3 is rapidly moved to the near side in the loading direction N (the puncturing direction front) together with the connecting portion 71 by the elastic force of the elastic member 7. When the puncture element 31 of the puncture moving body 3 protrudes from the puncture opening 42 of the cartridge case 4, the tip of the puncture element 31 is punctured at a predetermined location on the body. The above steps complete the puncture using the puncture device A1. After this, for example, measurement of SMBG or the like is performed on body fluid such as blood obtained by puncturing.

  Next, the operation of the puncture device A1 will be described.

  According to the present embodiment, as shown in FIGS. 3 and 4, when the puncture cartridge 2 is on the front side in the loading direction N with respect to the disengagement position, it is fixed to the moving side engaging portion 321 by the engaging maintaining portion 63. Engagement with the side engaging portion 41 is maintained. For this reason, even if the force accompanying loading of the puncture cartridge 2 acts on the puncture moving body 3, the position of the puncture moving body 3 is appropriately fixed with respect to the cartridge case 4. On the other hand, when the puncture cartridge 2 reaches the disengagement position, as shown in FIG. 5, the engagement maintaining portion 63 does not maintain the engagement between the moving side engaging portion 321 and the fixed side engaging portion 41, The engagement between the moving engagement portions 321 and 41 is released. Thereby, the puncturing movable body 3 can move smoothly without being restrained by the cartridge case 4. Therefore, at the time of loading, the position of the puncture element 31 in the puncture cartridge 2 can be more accurately defined, and at the time of puncture, the puncture element 31 can be appropriately moved in the puncture cartridge 2.

  The engagement release position shown in FIG. 5 is located on the rear side in the loading direction N than the elastic deformation start position shown in FIG. 4. Therefore, during the period from the elastic deformation start position in FIG. 4 to the engagement release position shown in FIG. 5 from the elastic deformation start position to the engagement release position shown in FIG. A force corresponding to the elastic force of the elastic member 7 is applied. The engagement between the moving engagement portion 321 and the fixed engagement portion 41 is reliably maintained by the engagement maintaining portion 63 in the section up to the engagement release position. As a result, until the engagement release position is reached, the elastic member 7 can be reliably elastically deformed without the engagement between the moving engagement portion 321 and the fixed engagement portion 41 being erroneously released. it can. Moreover, the transition to the state where the engagement maintaining part 63 does not maintain the engagement between the moving side engaging part 321 and the fixed side engaging part 41 excessively exceeds the force required for elastically deforming the elastic member 7, for example. It does not require a great deal of power. Therefore, when the user of the puncture device A1 loads the puncture cartridge 2, a large force that excessively exceeds the force necessary to accumulate the elastic force necessary for puncturing the puncture element 31 in the elastic member 7, There is no need to add to the puncture cartridge 2. This is preferable to reduce the work load required for the user's puncture.

  The moving side engaging portion 321 is configured to enter the fixed side engaging portion 41 in a direction intersecting the loading direction N. With regard to the engagement maintenance by the engagement maintaining portion 63, a part of the cartridge case 4 is in the loading direction It is done by preventing deformation in the direction crossing N. Such a configuration is preferable for suppressing the force required to maintain the engagement and for reliably releasing the engagement between the moving side engaging portion 321 and the fixed side engaging portion 41.

  When the engagement between the movable engagement portion 321 and the fixed engagement portion 41 is released at the engagement release position, the movement of the puncturing movable body 3 and the connection portion 71 is performed by the latch portion 81 as shown in FIG. Be blocked immediately. Thus, after the user completes elastic deformation of the elastic member 7 to the extent that puncturing is possible, the puncture device A1 in a state where the movement of the puncture moving body 3 is prevented by the latch portion 81 is suitable for puncture. It can be made to shift with ease.

  After loading of the puncture cartridge 2 is started, the cap 5 is separated from the holding part 32 before reaching the elastic deformation start position, whereby the puncture element 31 erroneously protrudes to the outside in the unused cartridge 2 etc. Can prevent the situation. Further, the force required to separate the cap 5 is transmitted via the engagement portion between the moving engagement portion 321 and the fixed engagement portion 41. Since the cap 5 can be smoothly separated by the configuration in which the engaging force between the moving side engaging portion 321 and the fixed side engaging portion 41 can be easily enhanced, the cap 5 can be separated in an erroneous manner. It can be avoided that the engagement between the movable engagement portion 321 and the fixed engagement portion 41 is released.

  8 to 13 show another embodiment of the present invention. In these drawings, the same or similar elements as those in the above embodiment are denoted by the same reference numerals as those in the above embodiment.

  FIG. 8 shows a puncture device according to a second embodiment of the present invention. The puncture device A2 of the present embodiment is different from the embodiment described above in the specific configuration of the moving side engaging portion 321 of the puncture movable body 3 of the device main body 1 as shown in FIG. Moreover, the specific structure of the engagement maintenance part 63 of the instrument main body 1 is different from the embodiment described above. Due to these differences, in the present embodiment, the specific behavior when the movable engagement portion 321 and the fixed engagement portion 41 are maintained and released is different from the above-described embodiment.

  In the present embodiment, the movable engagement portion 321 generally protrudes outward (right side in the drawing) from the center of the holding portion 32 in the horizontal direction in the drawing. And the movement side engaging part 321 has the collar part 321a. The flange portion 321a is a portion in which an intermediate portion in the longitudinal direction (left and right direction in the drawing) of the moving side engaging portion 321 is wider or thicker than the surrounding portion.

  FIG. 9 is a front view of an essential part showing the moving side engaging portion 321 and the engagement maintaining portion 63, as viewed from the left side in FIG. The engagement maintaining part 63 has a maintaining slit 631 and a release slit 632 in the present embodiment. The maintenance slit 631 is relatively located on the front side in the loading direction N and is along the loading direction N. The width of the maintenance slit 631 is smaller than the flange portion 321a, and is larger than the peripheral portion of the flange portion 321a in the moving side engaging portion 321. The release slit 632 is connected to the rear side in the loading direction N with respect to the maintenance slit 631. The width | variety of the cancellation | release slit 632 is larger than the collar part 321a. In addition, an inclined surface is provided at an end portion on the near side in the loading direction N of the engagement maintaining portion 63.

  Although the collar part 321a shown in FIG. 9 is made into circular shape, this is an example and should just be a shape which is larger than the maintenance slit 631 such as rectangular shape and polygonal shape.

  Next, puncturing using the puncture device A2 will be described below with reference to FIGS.

  When the puncture cartridge 2 is moved from the state shown in FIG. 8 to the back in the loading direction N, as shown in FIG. 9, the moving engagement portion 321 enters the maintenance slit 631 of the engagement maintaining portion 63 (FIG. 9). The collar part 321a) shown on the upper side. Under the present circumstances, as shown in FIG. 10, the collar part 321a of the movement side engagement part 321 is located in the figure right in the figure rather than the engagement maintenance part 63. As shown in FIG. For this reason, even if an external force or the like acts on the moving side engaging portion 321, the engagement maintaining portion 63 prevents the moving side engaging portion 321 from being deformed to the left in the drawing.

  Further, as shown in FIG. 10, the cap portion 5 and the separation portion 621 are brought into contact with each other. When the puncture cartridge 2 is further moved, the cap portion 5 is separated from the holding portion 32 as in the case of the puncture device A1. Next, as shown in FIG. 11, the rear end protrusion 322 of the holding portion 32 is fitted into the connecting recess 711 of the connecting portion 71, whereby the holding portion 32 and the connecting portion 71 are connected. As in the case of the puncture device A1 described above, the position of the puncture cartridge 2 at this time is the elastic deformation start position.

  When the puncture cartridge 2 is further moved to the back side in the loading direction N, as shown in FIG. 12, the puncture cartridge 2 reaches the disengagement position of this embodiment. In the present embodiment, the flange portion 321a of the moving side engaging portion 321 has reached the release slit 632 of the engagement maintaining portion 63 (the flange portion 321a shown on the lower side in FIG. 9). As the collar portion 321 a enters the release slit 632, the movable engagement portion 321 is allowed to deform to the left in the drawing. A force corresponding to the elastic force of the elastic member 7 is applied to the engaging portion between the moving side engaging portion 321 and the fixed side engaging portion 41. Therefore, the moving engagement portion 321 exhibits a deformation behavior such that the tip thereof moves to the left in the drawing. As a result, the engagement between the moving side engaging portion 321 and the fixed side engaging portion 41 is released.

  After this, as shown in FIG. 13, after temporarily stopping the movement of the connecting portion 71 and the puncturing moving body 3 by the latch portion 81, as shown in FIG. A puncture is performed.

  Even in such an embodiment, the puncture element 31 can be appropriately moved in the puncture cartridge 2 during puncturing while the position of the puncture element 31 in the puncture cartridge 2 is more accurately defined during loading. In addition, it is possible to reduce the work load required for the user's puncture.

  Further, in the present embodiment, in addition to the function of preventing the deformation of the movable engagement portion 321, the maintenance slit 631 of the engagement maintenance portion 63 guides the puncture movable body 3 in the puncturing step shown in FIG. Function can be expected.

  FIG. 15 shows a puncture device according to a third embodiment of the present invention. In the puncture device A3 of this embodiment, as shown in FIG. 15, the specific configurations of the moving side engaging portion 321 and the fixed side engaging portion 41 of the puncture moving body 3 of the device main body 1 are different from those in the embodiment described above. Yes. Moreover, the specific structure of the engagement maintenance part 63 of the instrument main body 1 is different from the embodiment described above. Due to these differences, in the present embodiment, the specific behavior when the movable engagement portion 321 and the fixed engagement portion 41 are maintained and released is different from the above-described embodiment.

  In the present embodiment, the moving side engaging portion 321 has the same shape as the moving side engaging portion 321 in the puncture device A1. On the other hand, the fixed side engaging portion 41 is constituted by a protrusion located on the back side in the loading direction N. Further, a through hole 44 is formed in the cartridge case 4. The through hole 44 is provided at a position adjacent to the protrusion of the fixed side engaging portion 41 on the front side in the loading direction N, and a portion positioned on the front side of the moving side engaging portion 321 in the loading direction N Have.

  The engagement maintaining portion 63 includes an engagement movable element 633, a guide element 634, and a base element 635. The base element 635 is a support member that can reciprocate in the loading direction N with respect to the main body case 6. The base element 635 may be configured to autonomously return to the position shown in FIG. 15 by an elastic biasing means (not shown), or may be configured to return by a user operation.

  The engagement movable element 633 is a member having a bent shape rotatably supported with respect to the base element 635. In the present embodiment, the end in the loading direction N of the engagement movable element 633 is connected to the base element 635 so as to be rotatable. Also, a spring 633a is provided coupled to the engaging movable element 633 and the base element 635. The spring 633a functions to open the engaging movable element 633 rightward in the drawing.

  The guide element 634 is fixed to the main body case 6 and is constituted by a part of the main body case 6 or a separate member attached to the main body case 6. The guide element 634 has an inclined surface located on the front side in the loading direction N and an inner side surface along the loading direction N located on the far side in the loading direction N with respect to the inclined surface.

  Next, puncture using the puncture device A3 will be described below with reference to FIGS.

  When the puncture cartridge 2 is moved from the state shown in FIG. 15 to the loading direction N back side, the loading direction N back end of the cartridge case 4 of the puncture cartridge 2 is the base element of the instrument main body 1 as shown in FIG. Abuts on 635. When the puncture cartridge 2 is further loaded from this state, the base element 635 and the engagement movable element 633 move along with the puncture cartridge 2 in the loading direction N. Then, when the engagement movable element 633 abuts on the inclined surface of the guide element 634, the engagement movable element 633 is pivoted to the left in the figure. When the loading is further advanced, as shown in FIG. 17, the engaging movable element 633 is brought into an upright posture along the loading direction N by the inner surface of the guide element 634. At this time, the tip end of the engagement movable element 633 penetrates the through hole 44 of the cartridge case 4 and sandwiches the movable engagement portion 321 together with the fixed engagement portion 41. As a result, the engagement maintenance between the moving engagement portion 321 and the fixed engagement portion 41 by the engagement maintaining portion 63 is started. This position is called an engagement start position for convenience. Note that by changing the shape of the distal end portion of the engaging movable element 633, it is possible to engage with the moving side engaging portion 321 only by the engaging movable element 633.

  Further, when the puncture cartridge 2 is further moved, the cap unit 5 is separated from the holding unit 32 as in the case of the puncture devices A1 and A2. Next, as shown in FIG. 18, the rear end protrusion 322 of the holding portion 32 is fitted into the connecting recess 711 of the connecting portion 71, whereby the holding portion 32 and the connecting portion 71 are connected. As in the case of the puncture devices A1 and A2 described above, the position of the puncture cartridge 2 at this time is the elastic deformation start position.

  When the puncture cartridge 2 is further moved in the loading direction N, as shown in FIG. 19, the puncture cartridge 2 reaches the engagement release position of this embodiment. In this embodiment, the front end of the engaging movable element 633 in the loading direction N is positioned on the back side in the loading direction N of the loading side N of the inner surface of the guide element 634 so that the inside of the guide element 634 is located. The rotation prevention of the engagement movable element 633 by the side is released. For this reason, the engagement movable element 633 is rotated rightward in the drawing by the elastic force of the spring 633 a, and the tip of the engagement movable element 633 is detached from the through hole 44. As a result, the engagement between the moving engagement portion 321 and the fixed engagement portion 41 is released.

  After this, as shown in FIG. 20, after temporarily stopping the movement of the connecting portion 71 and the puncturing moving body 3 by the latch portion 81, as shown in FIG. 21, the puncturing element 31 of the puncturing moving body 3 A puncture is performed.

  Even in such an embodiment, the puncture element 31 can be appropriately moved in the puncture cartridge 2 during puncturing while the position of the puncture element 31 in the puncture cartridge 2 is more accurately defined during loading. In addition, it is possible to reduce the work load required for the user's puncture.

  Further, in the present embodiment, the engagement state of the movable engagement portion 321 and the fixed engagement portion 41 can be made significantly different by the approach and separation of the engagement movable element 633 into and out of the through hole 44. It is. Therefore, in the state in which the engagement is to be maintained, the moving engagement portion 321 and the fixed engagement portion 41 are more reliably engaged, and in the state in which the engagement is to be released, the movement engagement portion The engagement between the 321 and the fixed side engaging portion 41 can be immediately released. In addition, the force required when loading the puncture cartridge 2 into the main body case 6 can be reduced, and even a weak user can easily load the puncture cartridge 2.

  The puncture device according to the present invention is not limited to the embodiment described above. The specific configuration of each part of the puncture device according to the present invention can be varied in design in many ways.

A1 to A3 Puncturing instrument 1 Instrument body 2 Puncturing cartridge 3 Puncturing moving body 31 Puncturing element 32 Holding section 321 Moving side engaging section 321a Hook section 322 Rear end protrusion 323 Overhang section 4 Cartridge case 41 Fixed side engaging section 42 Puncturing opening 43 Stopper portion 44 Through hole 5 Cap portion 51 Connecting portion 6 Body case 62 Guide portion 621 Separated portion 63 Engagement maintaining portion 631 Maintenance slit 632 Release slit 633 Engaging movable element 633a Spring 634 Guide element 635 Base element 7 Elastic member 71 Connecting portion 711 Connection recess 712 Latch recess 81 Latch part N Loading direction

Claims (7)

A puncture cartridge having a puncture mobile body having a puncture element and a cartridge case for housing the puncture mobile body;
A puncture device comprising: a main body case loaded with the puncture cartridge; and an instrument main body provided with an elastic member attached to the main body case and exhibiting an elastic force for moving the puncture moving body toward a puncture target An appliance,
The puncture moving body has a moving side engaging portion,
The cartridge case has a fixed side engaging portion that fixes the puncturing moving body to the cartridge case by engaging with the moving side engaging portion.
In the loading direction in which the puncture cartridge is loaded into the main body, the instrument body is in an engagement disengagement position set on the back side in the loading direction with respect to an elastic deformation start position at which elastic deformation of the elastic member by the puncture cartridge starts. wherein when the puncture cartridge is positioned, have a engagement maintaining portion for maintaining the engagement between the fixed-side engaging portion and the movable-side engaging portion in a section of up to,
A part of one of the moving engagement portion and the fixed engagement portion enters the other in a direction intersecting the puncture direction,
The engagement maintaining portion maintains the engagement between the movable engagement portion and the fixed engagement portion by preventing deformation of a part of the cartridge case in a direction intersecting the puncturing direction. puncture device to be. A puncture cartridge having a puncture mobile body having a puncture element and a cartridge case for housing the puncture mobile body;
A puncture device comprising: a main body case loaded with the puncture cartridge; and an instrument main body provided with an elastic member attached to the main body case and exhibiting an elastic force for moving the puncture moving body toward a puncture target An appliance,
The puncturing moving body has a moving side engaging portion,
The cartridge case has a fixed side engaging portion that fixes the puncturing moving body to the cartridge case by engaging with the moving side engaging portion.
In the loading direction in which the puncture cartridge is loaded into the main body, the instrument main body is an engagement release position set to the loading direction back side with respect to an elastic deformation start position at which elastic deformation of the elastic member by the puncture cartridge starts. When the puncture cartridge is located in the section up to, it has an engagement maintaining part that maintains the engagement between the moving side engaging part and the fixed side engaging part,
The moving-side engaging portion and the fixed-side engaging portion have one part entering the other in the direction intersecting the puncturing direction,
The engagement maintaining portion maintains the engagement between the movable engagement portion and the fixed engagement portion by preventing the movable engagement portion from being deformed in a direction intersecting the puncture direction. Puncture device. A puncture cartridge having a puncture mobile body having a puncture element and a cartridge case for housing the puncture mobile body;
A puncture device comprising: a main body case loaded with the puncture cartridge; and an instrument main body provided with an elastic member attached to the main body case and exhibiting an elastic force for moving the puncture moving body toward a puncture target An appliance,
The puncturing moving body has a moving side engaging portion,
The cartridge case has a fixed side engaging portion that fixes the puncturing moving body to the cartridge case by engaging with the moving side engaging portion.
In the loading direction in which the puncture cartridge is loaded into the main body, the instrument main body is an engagement release position set to the loading direction back side with respect to an elastic deformation start position at which elastic deformation of the elastic member by the puncture cartridge starts. When the puncture cartridge is located in the section up to, it has an engagement maintaining part that maintains the engagement between the moving side engaging part and the fixed side engaging part,
The puncturing cartridge includes an engagement movable element having an engagement posture engaging with the movable engagement portion and a non-engagement posture not engaged with the movable engagement portion. And a guide element for causing the engagement movable element to assume the engagement posture during the period until the disengagement position is reached. Force to elastically deform the elastic member by the puncture cartridge is transmitted through the engaging portion between said moving side engaging portion and the fixed-side engaging portion, according to any one of claims 1 to 3 Puncture device. The engagement maintaining portion is configured to move the movable-side engagement portion and the fixed-side engagement in a section from the engagement maintenance start position located on the near side in the loading direction to the engagement release position with respect to the elastic deformation start position. The puncture device according to any one of claims 1 to 4, wherein the puncture device maintains engagement with the portion. The instrument main body is a latch that temporarily maintains the elastic deformation of the elastic member after the engagement maintaining portion does not maintain the engagement between the moving side engaging portion and the fixed side engaging portion. The puncture device according to any one of claims 1 to 5 , which has a portion. The puncture cartridge has a cap portion that covers the puncture element and is connected to the puncture moving body,
The device body according to any one of claims 1 to 6 , wherein the device body has a separating portion that separates the cap portion from the puncturing moving body by contacting the cap portion on the near side in the puncturing direction with respect to the engagement release position. The puncture device described in.

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