JP6557072B2 - 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 blood of the patient. 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 puncture element is punctured by the propulsive force from the elastic member, it is desirable that the puncture element is easily moved in the puncture cartridge. 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.

JP2013-121380A

  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 puncture 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 The elastic member is started to be elastically deformed by the puncture cartridge in the loading direction in which the puncture cartridge is loaded into the instrument body. When the puncture cartridge is positioned at an engagement release position set on the back side in the loading direction with respect to the elastic deformation start position, the engagement between the moving side engaging portion and the fixed side engaging portion is released. It has a disengagement part.

  In a preferred embodiment of the present invention, the force for elastically deforming the elastic member by the puncture cartridge is transmitted via the engaging portion between the moving side engaging portion and the fixed side engaging portion.

  In a preferred embodiment of the present invention, one part of the moving side engaging part and the fixed side engaging part enters the other in a direction intersecting the puncturing direction, and the disengaging part Releases a part of the cartridge case in a direction crossing the puncturing direction, thereby releasing the engagement between the moving side engaging part and the fixed side engaging part.

  In a preferred embodiment of the present invention, one part of the moving side engaging part and the fixed side engaging part enters the other in a direction intersecting the puncturing direction, and the disengaging part Releases the engagement between the moving side engaging portion and the fixed side engaging portion by deforming the moving side engaging portion in a direction crossing the puncture direction.

  In a preferred embodiment of the present invention, the instrument body is elastically deformed after the engagement of the moving side engaging portion and the fixed side engaging portion is released by the engagement releasing portion. Has a latch portion for temporarily maintaining the above.

  In a preferred embodiment of the present invention, the puncture cartridge has a cap portion that covers the puncture element and is connected to the puncture moving body, and the instrument body is located at a position higher than the disengagement 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 front side in the loading direction with respect to the disengagement position, the engagement between the moving side engaging portion and the fixed side engaging portion 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 disengagement part releases the engagement between the moving side engagement part and the fixed side engagement part. Thereby, the puncture 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.

It is a perspective view which shows the puncture device based on 1st Embodiment of this 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 the 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 in which the puncture preparation of FIG. 1 was prepared. 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 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. It is sectional drawing which shows the state in which the puncture preparation of FIG. 8 was prepared. 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, for example, for collecting blood, which is a measurement target specimen of a simple blood glucose meter (SMBG), from a patient's fingertip or the like.

  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. In the present embodiment, the direction in which a puncture moving body 3 to be described later moves when puncturing is a direction along the loading direction N, and moves toward the front side in the loading direction N. 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. As a cylindrical specific form, for example, a rectangular tube shape or a cylindrical shape can be adopted. An example of the material of the cartridge case 4 is resin.

  In the cartridge case 4, a fixed side engaging portion 41, a puncture opening 42 and a stopper portion 43 are formed. The fixed side engaging portion 41 has a function of fixing the puncture moving body 3 to the cartridge case 4 by engaging with a part of the puncture moving body 3. In the present embodiment, the fixed-side engaging portion 41 is provided on the inner surface of the cartridge case 4 that is cylindrical, and is a concave portion that is recessed in the left-right 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 in the vicinity of the end portion on the near side in the loading direction N of the cartridge case 4 and protrudes inward from the inner side surface of the cartridge case 4 in the left-right 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 pointed shape toward the front side in the loading direction N (forward in the puncture direction).

  The holding part 32 is a part for holding the puncture element 31 and is made of, for example, 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. In addition, the distal end of the moving side engaging portion 321 enters the fixed side engaging portion 41 which is a concave portion in the left-right direction in the drawing, which is a direction intersecting the loading direction N.

  Note that the engagement between the moving side engaging portion 321 and the fixed side engaging portion 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 loading direction N front side. The rear end protrusion 322 is a part that is connected to a part of the instrument 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 overhang 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 front side in the loading direction N. The overhang portion 323 is intended to prevent the puncture element 31 of the puncture moving body 3 from unintentionally protruding from the puncture cartridge 2 when it is discarded after use, for example. 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 has a size and a shape that can be broken so as to reliably connect the holding portion 32 and the cap portion 5 when not in use, and to appropriately separate the cap portion 5 from the holding portion 32 in a process that will be described later. ing.

  Alternatively, the puncture moving body 3 in which the puncture element 31 and the holding portion 32 are integrally formed may be employed. In this case, the puncture moving body 3 may be formed of metal, or may be formed of resin on the condition that the puncture by the puncture 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 main body 1 of this embodiment includes a main 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 part that supports the loaded puncture cartridge 2. In the present embodiment, the main body case 6 is formed in a cylindrical shape that opens to the front side in the loading direction N as a whole, and the puncture cartridge 2 is loaded toward the internal space. 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. The body case 6 is made of resin, for example.

  The main body case 6 has an engagement release portion 61 and a guide portion 62.

  The disengagement part 61 is configured by a part of the main body case 6 or another member attached to the main body case 6. The disengaging part 61 fulfills the function of releasing the engagement between the movable side engaging part 321 and the fixed side engaging part 41 of the puncture cartridge 2 at the timing described later when the puncture cartridge 2 is loaded. In the present embodiment, the engagement release portion 61 has a shape having a slope extending in the upper left direction in the drawing and the lower right direction in the drawing in FIG.

  The guide portion 62 is a member extending along the loading direction N, and is configured by a part of the main body case 6 or another 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 contracts to the right in the drawing and the contracted overhanging portion 323 slides when the puncture cartridge 2 is loaded. The guide part 62 has a separation part 621. The separation part 621 fulfills the function of separating the cap part 5 from the holding part 32 by abutting against the cap part 5 of the puncture cartridge 2 in a later-described step in loading the puncture cartridge 2.

  The elastic member 7 exerts an elastic force that moves the puncture moving body 3 of the puncture cartridge 2 forward in the puncture direction (front side in the loading direction N). 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 back end in the loading direction N 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 puncture moving body 3 and the elastic member 7 by being connected to the rear end protrusion 322 of the puncture moving body 3. The connecting part 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 connecting recess 711 is recessed toward the back in the loading direction N, and is a portion into which the rear end protrusion 322 of the puncture 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 connecting recess 711 at a desired position in a state where the elastic member 7 can exert an elastic force. The specific structure of the latch part 81 is not specifically limited, In this embodiment, it consists of a member sharpened to the left in the figure. 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 merely an example of a specific structure for temporarily stopping the connecting 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 a use start state of the puncture device A1. The puncture cartridge 2 is not yet used. 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 engaged, and the puncturing 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 the loading proceeds, the state shown in FIG. 3 is obtained. In the figure, the separation part 621 of the guide part 62 of the instrument body 1 abuts against the cap part 5 of the puncture cartridge 2. At this time, the puncture cartridge 2 is located on the front side in the loading direction N with respect to an engagement release position described 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 the puncture cartridge 2 is moved to the back side in the loading direction N while holding the cartridge case 4, the force applied from the user's hand is from the cartridge case 4 to the fixed side engaging portion 41 and the moving 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 part 5 is separated from the holding part 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. Note that the puncture cartridge 2 may 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 proceeding from the state shown in FIG. 3 to the state shown in FIG. 4, the cap unit 5 remains prevented from moving toward the back side in the loading direction N by the guide unit 62 (separating unit 621). . For this reason, the cap unit 5 is configured to move relatively to the front side in the loading direction N with respect to the puncture moving body 3 and the cartridge case 4. 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. The puncture moving body 3 (puncture element 31) is configured to retract from the puncture activation. 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 to the back side in the loading direction N in this movement 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 puncture moving body 3 and the fixed side engaging portion 41 of the cartridge case 4. Therefore, the engaging portion between the moving side engaging portion 321 and the fixed side engaging portion 41 needs to be configured to maintain the engaged state even when a force greater than the elastic force of the elastic member 7 is applied.

  Then, as shown in FIG. 5, the puncture cartridge 2 reaches the disengagement position. This disengagement position is a position where the engagement of the moving side engaging portion 321 and the fixed side engaging portion 41 is released by the disengaging portion 61. In the present embodiment, as a result of the puncture cartridge 2 being moved to the loading direction N back side, the loading direction N back side end of the fixed side engaging portion 41 of the puncture cartridge 2 is located on the body case 6 of the instrument body 1. It contacts the disengagement part 61. Further, when the puncture cartridge 2 is moved to the back side in the loading direction N, the loading direction N back side end of the main body case 6 is deformed outward in the left-right direction in the drawing along the slope of the engagement release portion 61. . As a result, the fixed side engaging portion 41 of the cartridge case 4 is separated from the moving side engaging portion 321 outward in the left-right direction in the figure. As a result, the engagement between the moving side engaging portion 321 and the fixed side engaging portion 41 is released.

  In the present embodiment, as described above, 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. For this reason, when the fixed side engaging part 41 starts to move away from the moving side engaging part 321 outward in the left-right direction in the figure, the moving side engaging part 321 is completely removed from the fixed side engaging part 41. Before the moving side engaging portion 321 is bent by the applied force, the moving side engaging portion 321 is detached from the fixed side engaging portion 41, and the engagement is released. In FIG. 5, for convenience of understanding, the positional relationship in which the moving side engaging portion 321 completely comes out of the fixed side engaging portion 41 is shown, but in actuality, the engagement is released before reaching the illustrated state. Can be done.

  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 changeable as desired 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 puncture moving body 3 rapidly moves to the front side in the loading direction N (forward in the puncture direction) 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 puncture using the puncture device A1 is completed through the above steps. Thereafter, measurement of, for example, SMBG is performed on a body fluid such as blood obtained by puncture.

  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, the moving side engaging portion 321, the fixed 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, the engagement between the moving side engaging portion 321 and the fixed side engaging portion 41 is released by the disengaging portion 61 as shown in FIG. Thereby, the puncture moving body 3 can be moved 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 disengagement position shown in FIG. 5 is located on the back side in the loading direction N from the elastic deformation start position shown in FIG. Therefore, until the puncture cartridge 2 reaches the disengagement position shown in FIG. 5 from the elastic deformation start position in FIG. A force corresponding to the elastic force of the elastic member 7 is applied. The engagement between the moving side engaging portion 321 and the fixed side engaging portion 41 is released only by using the disengaging portion 61 at the disengaging position, and until reaching the disengaging position. It is possible to adopt a configuration that can increase the engagement force between the moving side engaging portion 321 and the fixed side engaging portion 41 during the period. As a result, the elastic member 7 can be reliably elastically deformed without accidentally releasing the engagement between the moving side engaging portion 321 and the fixed side engaging portion 41 until the engagement releasing position is reached. it can. Further, the disengagement between the moving side engaging portion 321 and the fixed side engaging portion 41 by the disengaging portion 61 does not require a large force that excessively exceeds the force required to elastically deform the elastic member 7, for example. . 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 for reducing the work load required for the user's puncture.

  The moving side engaging portion 321 is configured to enter the direction intersecting the loading direction N with respect to the fixed side engaging portion 41, and the engagement between the moving side engaging portion 321 and the fixed side engaging portion 41 is released. This is done by deforming a part of the cartridge case 4 in a direction crossing the loading direction N. Such a configuration is preferable for suppressing the force required for releasing 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 moving side engaging portion 321 and the fixed side engaging portion 41 is released at the disengagement position, the movement of the puncture moving body 3 and the connecting portion 71 is moved by the latch portion 81 as shown in FIG. Promptly stopped. 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. Can be transferred with a margin in the posture.

  After the loading of the puncture cartridge 2 is started and before the elastic deformation start position is reached, the cap portion 5 is separated from the holding portion 32 so that the puncture element 31 is accidentally protruded to the outside in the unused puncture cartridge 2. Can prevent the situation. Further, the force required for the separation of the cap portion 5 is transmitted via the engaging portion between the moving side engaging portion 321 and the fixed side engaging portion 41. The configuration in which the engaging force between the moving side engaging portion 321 and the fixed side engaging portion 41 can be easily increased, so that the cap portion 5 can be separated smoothly, and an error is caused when the cap portion 5 is separated. Thus, it is possible to avoid the engagement between the moving side engaging portion 321 and the fixed side engaging portion 41 being 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.

  As shown in FIG. 8, in the puncture device A2 of the present embodiment, the specific configuration of the moving side engaging portion 321 of the puncture moving body 3 of the device body 1 is different from the above-described embodiment. Moreover, the specific structure of the engagement releasing part 61 of the instrument main body 1 is different from the above-described embodiment. Due to these differences, in this embodiment, the specific behavior when the moving side engaging portion 321 and the fixed side engaging portion 41 are released is different from that of the above-described embodiment.

  In the present embodiment, the moving side engaging portion 321 protrudes from the center in the left-right direction in the drawing to the outside (right side in the drawing) as a whole. And the part which extends in the left-right direction in the figure connected to the main body of the movement side engaging part 321 and the holding | maintenance part 32, the part extended from the lower left in the figure to the upper right, and the part extended in the left-right direction in the figure are included. . The distal end of the moving side engaging portion 321 enters the fixed side engaging portion 41 as in the above-described embodiment, whereby the moving side engaging portion 321 and the fixed side engaging portion 41 are engaged. ing.

  In the present embodiment, the disengaging part 61 has a circular cross-sectional shape shown in FIG. However, such a shape is an example of the shape of the disengagement part 61 and is not particularly limited as long as the disengagement process described later can be appropriately realized.

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

  The puncture cartridge 2 is moved from the state shown in FIG. 8 toward the back side in the loading direction N, and the cap portion 5 and the separation portion 621 are brought into contact with each other as shown in FIG. 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. 10, 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 in the loading direction N, as shown in FIG. 11, the puncture cartridge 2 reaches the disengagement position of the present embodiment. In the present embodiment, the disengagement part 61 abuts on the obliquely extending part of the moving side engagement part 321. When the puncture cartridge 2 is moved to the back side in the loading direction N after this contact, the moving side engaging portion 321 is contracted inward in the left-right direction (left side) in the figure by the disengaging portion 61. Deform. As a result, the distal end of the moving side engaging portion 321 starts to be separated from the fixed side engaging portion 41. As in the case of the puncture device A1, a force corresponding to the elastic force exerted by the elastic member 7 is applied to the engaging portion between the moving side engaging portion 321 and the fixed side engaging portion 41. . The leading end of the moving side engaging portion 321 is detached from the fixed side engaging portion 41 due to the deformation of the moving side engaging portion 321 by this force, and the engagement between the moving side engaging portion 321 and the fixed side engaging portion 41 is engaged. The match can be released. Note that the engagement may be released when the moving-side engaging portion 321 is in a positional relationship in which it completely comes out of the fixed-side engaging portion 41.

  After this, as shown in FIG. 12, after the temporary movement prevention state between the connecting portion 71 and the puncture moving body 3 by the latch portion 81, the puncture element 31 of the puncture moving body 3 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 burden required for the user's puncture.

  Further, in the present embodiment, the engagement between the moving side engaging portions 321 and 41 is released by deforming the moving side engaging portion 321 by the engagement releasing portion 61. Since the cartridge case 4 is a member that accommodates the puncture moving body 3, it may be necessary to have rigidity that can achieve an object such as protecting the puncture moving body 3. On the other hand, the moving-side engaging portion 321 is a portion intended only for engagement with the fixed-side engaging portion 41, and does not need to fulfill functions such as protecting other portions. For this reason, if the moving side engaging part 321 is a structure which raises the engaging force with the fixed side engaging part 41 sufficiently, it will be easy to deform | transform into the aspect which can implement | achieve engagement cancellation | release by the engagement releasing part 61. FIG. Can be adopted.

  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 various ways.

A1, A2 Puncturing instrument 1 Instrument body 2 Puncturing cartridge 3 Puncturing moving body 31 Puncturing element 32 Holding section 321 Moving side engaging section 322 Rear end projection 323 Overhang section 4 Cartridge case 41 Fixed side engaging section 42 Puncturing opening 43 Stopper section 5 Cap part 51 Connection part 6 Body case 61 Disengagement part 62 Guide part 621 Separation part 7 Elastic member 71 Connection part 711 Connection recessed part 712 Latch recessed part 81 Latch part N Loading direction

Claims (6)

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 instrument,
Either one of the puncture moving body and the cartridge case has a protrusion having a tip extending in a direction perpendicular to the puncture direction ,
The other of the puncture moving body and the cartridge case has a recess having an inner wall that is inserted into the tip of the protrusion and engages with the tip of the protrusion in the puncture direction and the direction opposite to the puncture direction. And
The instrument body has a disengagement portion;
The disengagement part is set in the loading direction in which the puncture cartridge is loaded into the instrument body, and is set on the back side in the loading direction from the elastic deformation start position where the elastic deformation of the elastic member by the puncture cartridge starts. When the puncture cartridge is positioned at the mating release position, it comes into contact with a part of the puncture cartridge,
In the part where the part of the puncture cartridge and the disengagement part abut, a slope is provided on either the part of the puncture cartridge and the disengagement part,
When the puncture cartridge is positioned on the back side in the loading direction with respect to the disengagement position, a part of the puncture cartridge is deformed along the inclined surface, and the protrusion and the recess are separated from each other .
Puncture device. Force to elastically deform the elastic member by the puncture cartridge is transmitted through the engaging portion between said projecting portion and the concave portion, the puncture device according to claim 1. In the direction intersecting with the puncturing direction, the tip of the protruding portion has entered the recess ,
The engagement releasing portion, by deforming a portion of the cartridge case in a direction intersecting the puncture direction to release the engagement between the concave portion and the protruding portion, according to claim 1 or 2 Puncture device. In the direction intersecting with the puncturing direction, the tip of the protruding portion has entered the recess ,
The engagement releasing portion, by deforming the projecting portion in a direction intersecting the puncture direction, to release the engagement between said projecting portion and the concave portion, the puncture device according to claim 1 or 2. The said instrument main body has a latch part which maintains the elastic deformation of the said elastic member temporarily after the engagement with the said protrusion part and the said recessed part is cancelled | released by the said engagement cancellation | release part. The puncture device according to any one of the above. The puncture cartridge has a cap portion that covers the puncture element and is connected to the puncture moving body,
The said instrument main body has the isolation | separation part which isolate | separates the said cap part from the said puncture moving body by contact | abutting to the said cap part in the said puncture direction near side from the said engagement cancellation | release position. The puncture device according to the above.

Images