JP6200754B2 - Puncture tool - Google Patents

Description

  The present invention relates to a puncture device for puncturing and bleeding a skin.

  In recent years, with an increase in the number of diabetic patients, self blood glucose measurement in which patients themselves monitor fluctuations in daily blood glucose levels has been recommended. A blood glucose measuring device that automatically measures the amount of glucose in blood is used for measuring the blood glucose level. Prior to this measurement, the patient needs to collect his blood.

  As a method of collecting blood, after puncturing the skin of a fingertip or the like with a puncture tool equipped with a puncture needle, the blood is squeezed by pressing the periphery of the puncture portion with a finger or the like (for example, Patent Document 1 below) 2).

Japanese Patent No. 4182431 Special table 2007-536008 gazette

  By the way, in the conventional puncture device, in order not to give great pain or to prevent the amount of bleeding from the skin from becoming excessive or insufficient, it is necessary to adjust the puncture depth of the puncture needle with respect to the skin. Some have a mechanism (puncture depth adjusting mechanism) (for example, see Patent Document 1).

  However, in the conventional puncture device provided with the puncture depth adjustment mechanism, the puncture depth adjustment mechanism is realized by adding another part to the housing that accommodates the puncture needle, and has a complicated structure. . In particular, in the case of a disposable type puncture device that is thrown away after a single use, it is desired that the manufacturing cost be as low as possible. There is a problem of causing an increase.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a puncture device capable of adjusting the puncture depth with a simple structure.

  In order to achieve the above object, a puncture device of the present invention comprises a housing having an opening and a puncture needle that can project from the opening, and the puncture tool is provided around or near the opening of the housing. The angle with respect to a needle | hook is mutually different, The some contact surface contact | abutted to skin is provided, It is characterized by the above-mentioned.

  According to said structure, the puncture depth of the puncture needle punctured by skin can be adjusted with the contact surface to be used. For this reason, without adding a separate member for adjusting the puncture depth to the housing, the housing has a simple configuration in which a plurality of contact surfaces having different angles are provided on the housing, and a puncture depth adjustment function is provided. A puncture device can be realized.

In the above puncture device, the plurality of contact surfaces include a first contact surface provided with the opening, a second contact surface adjacent to the first contact surface, and the second contact surface. of the contact surface to have a third abutment surface adjacent to said first abutment surface at different positions. According to this configuration, the puncture depth can be adjusted in three stages by having the first to third contact surfaces.

In the above puncture instrument, the contact surface of the second and third, Ru inclined surfaces der inclined so far from the axis of the puncture needle toward the proximal direction of the puncture device. According to this configuration, the puncture depth can be easily adjusted by bringing the housing into contact with the skin in an inclined state.

  In the puncture device described above, the second and third contact surfaces may be provided on opposite sides of the first contact surface. According to this configuration, since the puncture depth can be adjusted in the same plane, that is, by changing the attitude of the housing (angle with respect to the skin) two-dimensionally, the operability is excellent.

The puncture device of the present invention includes a housing having an opening and a puncture needle that can protrude from the opening, and the angle with respect to the puncture needle is different around or near the opening of the housing. A plurality of contact surfaces that contact the skin are provided. Wherein the housing, the structure showing the puncture depth of the puncture needle in accordance with the plurality of abutment surfaces Ru provided. According to this configuration, the user can easily select the puncture depth of the puncture needle when using the puncture device.

  According to the puncture device of the present invention, the puncture depth can be adjusted with a simple structure.

It is a longitudinal cross-sectional view of the puncture device which concerns on one Embodiment of this invention. It is a perspective view which shows the front-end | tip part of the housing of the puncture device shown in FIG. It is a figure which shows the puncture device seen from the X direction in FIG. FIG. 4A is a diagram for explaining puncture with the first contact surface in contact with the skin, and FIG. 4B shows puncture with the second contact surface in contact with the skin. FIG. 4C is a diagram illustrating puncturing in a state where the third contact surface is in contact with the skin. It is a perspective view which shows the front-end | tip part of the housing which concerns on a modification.

  Hereinafter, preferred embodiments of the puncture device according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a longitudinal sectional view showing a puncture device 10 according to an embodiment of the present invention. The puncture device 10 is a device for puncturing the skin of a blood collection subject to obtain bleeding. As shown in FIG. 1, the puncture device 10 according to this embodiment includes a housing 12 that constitutes a main body of the puncture device 10, a needle unit 14 having a puncture needle 34, and a protective cap 16 attached to the needle unit 14. And a push rod 18 provided in the housing 12.

  In the following description, “axial direction” means the extending direction of the central axis C (hereinafter referred to as “axis C”) of the puncture needle 34.

  The housing 12 is a hollow structure having a lumen 13. As shown in FIGS. 1 and 2, an opening 19 through which the puncture needle 34 can project is provided at the distal end of the housing 12. FIG. 2 shows a state where the protective cap 16 is removed from the housing 12.

  In the housing 12, a plurality of contact surfaces 20 that are different in angle with respect to the puncture needle 34 and contact the skin of the blood collection subject are provided around or in the vicinity of the opening 19. In the present embodiment, specifically, the plurality of contact surfaces 20 have first to third contact surfaces 20a to 20c.

  The first contact surface 20 a is the contact surface 20 provided with the opening 19. In the illustrated example, the first contact surface 20a is a plane perpendicular to the axis C of the puncture needle 34, and has an appropriate area for contacting the skin. The first contact surface 20a may be a plane inclined with respect to the axis C of the puncture needle 34.

  The second and third contact surfaces 20b and 20c are provided on opposite sides with respect to the first contact surface 20a. The second contact surface 20b is continuous with the first contact surface 20a, is a plane inclined with respect to the axis C of the puncture needle 34, and has an appropriate area for contacting the skin. Specifically, the second contact surface 20 b is an inclined surface that is inclined so as to become farther from the axis C as it goes in the proximal direction of the puncture device 10.

  The third abutment surface 20c is connected to the first abutment surface 20a on the side opposite to the second abutment surface 20b, and is a plane inclined with respect to the axis C of the puncture needle 34. It has an appropriate area for contact. Specifically, the third contact surface 20 c is an inclined surface that is inclined so as to become farther from the axis C as it goes in the proximal direction of the puncture device 10.

  In the present embodiment, the inclination angle θ3 of the third contact surface 20c with respect to the axis C of the puncture needle 34 is smaller than the inclination angle θ2 of the second contact surface 20b with respect to the axis C of the puncture needle 34. Although depending on the maximum protrusion length of the puncture needle 34 from the opening 19 and the size of the first contact surface 20a, the inclination angle θ2 of the second contact surface 20b is set to 40 to 80 °, for example. The inclination angle θ3 of the third contact surface 20c is set to 20 to 60 °, for example.

  The areas of the first to third contact surfaces 20a to 20c may be the same as or different from each other.

  As described above, the housing 12 of the puncture device 10 is provided with a plurality of contact surfaces 20 (first to third contact surfaces 20a to 20c) having different angles with respect to the puncture needle 34. The puncture depth of the puncture needle 34 punctured into the skin can be adjusted by the contact surface 20 to be used. Although details will be described later, the puncture depth is the deepest when the first contact surface 20a is used, and the puncture depth is the shallowest when the third contact surface 20c is used. When used, the puncture depth is a depth between the puncture depths of the first contact surface 20a and the third contact surface 20c.

  The housing 12 may be provided with a structure indicating the puncture depth of the puncture needle 34 so that the user can easily select the puncture depth of the puncture needle 34 when using the puncture device 10. In the present embodiment, as shown in FIGS. 1 and 3, a plurality of indicators 22a to 22c are provided as a structure indicating the puncture depth. FIG. 3 shows the puncture device 10 as viewed from the direction of the arrow X in FIG. 1 (the base end side of the puncture device 10). Each index 22a to 22c in the illustrated example is a rib shape protruding from the outer surface of the housing 12, but may be a groove shape or a colored portion.

  As shown in FIG. 3, when the puncture device 10 is viewed from the proximal end side, the longest index 22a is provided at a position corresponding to the first contact surface 20a, and corresponds to the third contact surface 20c. The shortest index 22c is provided at the position where the longest index is located, and the index 22b having a length between the longest index and the shortest index is provided at the position corresponding to the second contact surface 20b. Thus, the lengths of the indices 22a to 22c are set in accordance with the magnitude relationship of the puncture depth of the puncture needle 34 when the first to third contact surfaces 20a to 20c are used.

  In addition, the structure which shows the puncture depth is not restricted to said parameter | index 22a-22c, For example, the shape of the side surface of the housing 12 in the side in which the 2nd contact surface 20b was provided, and the 3rd contact surface 20c It is good also as a structure which understands the difference in the puncture depth by making the shape of the side surface of the housing 12 of the side provided with different.

  As shown in FIG. 1, a square hole 24 is provided on the upper surface of the housing 12. In the housing 12, a cylindrical body 26 that extends in the axial direction rearward from the distal end portion and a first cam surface 28 that is inclined with respect to the axis C are provided. The cylindrical body 26 is provided with a hub passage 30 and a needle passage 32 that communicate with each other in the axial direction. The opening 19 is opened at the tip of the needle passage 32.

  The needle unit 14 includes a puncture needle 34 having a cutting edge 35 (needle tip) and a hub 36 that holds the puncture needle 34. The puncture needle 34 is for puncturing the skin, and is configured in a solid structure or a hollow structure. Although the constituent material of the puncture needle 34 is not specifically limited, For example, it is comprised with metals, such as stainless steel, aluminum, and titanium, or hard resin like polyphenylene sulfide.

  The puncture needle 34 has an outer diameter of, for example, about 0.1 to 1.0 mm, and is designed so that it can withstand the impact of puncture and the invasion of human tissue is small. In the initial state shown in FIG. 1, the tip of the puncture needle 34 is inserted into the needle passage 32. The hub 36 is inserted into the hub passage 30 and the needle passage 32 of the cylindrical body 26 so as to be axially displaceable.

  The protective cap 16 is a thin cylinder that is inserted into the needle passage 32 and covers the puncture needle 34. The protective cap 16 protrudes moderately from the housing 12.

  A coil spring 38 is provided between the tag 36 b constituting the base end portion of the hub 36 and the cylindrical body 26. A small-diameter portion 36 a that constitutes the distal end portion of the hub 36 is inserted into the coil spring 38. The front end of the coil spring 38 is fixed to the cylindrical body 26, and the rear end is fixed to the tag 36b.

  The push rod 18 is provided so as to be movable in a direction perpendicular to the axis C of the puncture needle 34. A second cam surface 40 inclined with respect to the axis C is provided at the lower end of the push rod 18. A recess 42 is provided slightly above the second cam surface 40 on the front surface of the push rod 18. An elastic arm 44 is connected to a location near the lower end of the rear surface of the push rod 18. The elastic arm 44 is a thin plate, has an appropriate elasticity, and functions as a leaf spring.

  Among the constituent elements of the puncture device 10, the constituent elements other than the puncture needle 34 and the coil spring 38 can be made of resin (for example, polypropylene or polyethylene) or metal.

  When puncturing the skin using the puncture device 10 configured as described above, first, the protective cap 16 is removed from the housing 12 and the puncture needle 34. Next, while holding the housing 12, any one of the plurality of contact surfaces 20 (first to third contact surfaces 20 a to 20 c) is brought into contact with the skin, and the push rod 18 is directed into the inner cavity 13. Push in. As the push rod 18 is pushed down, the elastic arm 44 is elastically deformed toward the push rod 18.

  When the arm end portion 44a of the elastic arm 44 passes through the upper end portion 28a of the first cam surface 28, the elastic arm 44 presses the first cam surface 28 while slidingly contacting the first cam surface 28, and the push rod 18 moves. Further, it is elastically biased so as to move downward. Thereby, the push rod 18 moves downward vigorously.

  At this time, the second cam surface 40 slidably contacts the rear end portion of the tag 36b when the push rod 18 is pushed down to push the needle unit 14 in the axial direction (front end direction). Further, as the needle unit 14 moves forward, the coil spring 38 is compressed. As the needle unit 14 advances, the tip of the puncture needle 34 protrudes from the opening 19 and is punctured into the skin. The needle unit 14 advances until the tag 36b reaches the upper end of the second cam surface 40 to reach the maximum puncture depth.

  After the needle unit 14 reaches the maximum puncture depth, the compressed coil spring 38 extends to push the needle unit 14 back. Thereby, the puncture needle 34 is quickly removed from the skin, and the puncture needle 34 is stored in the needle passage 32. On the other hand, when the push rod 18 moves downward and eventually reaches the movement end position, the tag 36 b engages with the recess 42.

  In this way, the puncture is easily performed, and an appropriate amount of blood comes out from the skin. Therefore, blood components are measured with a predetermined blood glucose meter or the like. The puncture tool 10 after use is discarded. As described above, the puncture device 10 shown in FIG. 1 is configured as a disposable type that is discarded after being used once.

  Of the puncture device 10 described above, a mechanism other than the puncture needle 34, that is, a mechanism for storing the puncture needle 34 in an initial state, causing the puncture needle 34 to protrude by a puncture start operation, and re-accommodating the puncture needle 34 immediately after the protrusion. The portion (main body) is not limited to the configuration shown in FIG. For example, the protrusion of the puncture needle 34 may be restricted against the elastic force of the elastic member in which elastic energy is stored in the initial state, and the puncture needle 34 may protrude when a predetermined puncture start operation is performed. .

  Alternatively, the puncture tip having the puncture needle 34 is configured to be detachable from the puncture device main body, and the puncture needle 34 protrudes when a puncture button provided on the puncture device main body is pressed with the puncture tip mounted. It may be configured. In this configuration, the puncture tip is discarded after being used once, and the puncture device body is used many times.

  As described above, in the present embodiment, a plurality of contact surfaces 20 (first to third contact surfaces 20a to 20c) having different angles with respect to the puncture needle 34 are provided at the distal end portion of the housing 12. For this reason, as will be described below, the puncture depth of the puncture needle 34 punctured into the skin can be adjusted by the contact surface 20 to be used.

  As shown in FIG. 4A, when puncturing is performed with the first abutment surface 20 a in contact with the skin S, the puncture depth of the puncture needle 34 with respect to the skin S is determined by the puncture needle 34 from the opening 19. It is approximately equal to the maximum protrusion length. In the puncture device 10, the deepest puncture depth is obtained when the first contact surface 20a is used. The puncture depth L1 with respect to the skin S when the first contact surface 20a is used is, for example, 0.18 to 1.8 mm.

  As shown in FIG. 4B, when puncturing is performed with the second contact surface 20b in contact with the skin S, the opening 19 is separated from the surface of the skin S due to the inclination of the second contact surface 20b. Therefore, the puncture depth L2 of the puncture needle 34 with respect to the skin S is shallower than the puncture depth L1 shown in FIG. 4A. The puncture depth L2 with respect to the skin S when the second contact surface 20b is used is, for example, 0.3 to 1.5 mm.

  As shown in FIG. 4C, when puncturing is performed with the third contact surface 20c in contact with the skin S, the opening 19 is separated from the surface of the skin S due to the inclination of the third contact surface 20c. It will be in the state. The inclination angle θ3 of the third contact surface 20c with respect to the axis C of the puncture needle 34 is smaller than the inclination angle θ2 of the second contact surface 20b with respect to the axis C of the puncture needle 34 (see FIG. 1). The distance between 19 and the skin S is greater than when the second contact surface 20b is used. As a result, the puncture depth L3 of the puncture needle 34 with respect to the skin S is shallower than the puncture depth L2 shown in FIG. 4B. The puncture depth L3 with respect to the skin S when the third contact surface 20c is used is, for example, 0.1 to 1.3 mm.

  As described above, according to the puncture device 10 according to the present embodiment, a plurality of contact surfaces 20 (first to third contact surfaces 20a to 20c) having different angles with respect to the puncture needle 34 are provided. The puncture depth of the puncture needle 34 punctured into the skin S can be adjusted by the contact surface 20 to be used. Therefore, the puncture depth can be adjusted with a simple configuration in which a plurality of contact surfaces 20 having different angles are provided on the housing 12 without adding a separate member for adjusting the puncture depth to the housing 12. A puncture device 10 having a function can be realized.

  In the case of this embodiment, the plurality of contact surfaces 20 include a first contact surface 20a provided with an opening 19 and a second contact surface 20b adjacent to the first contact surface 20a. And a third contact surface 20c adjacent to the first contact surface 20a at a position different from the second contact surface 20b. According to this configuration, the puncture depth can be adjusted in three stages.

  In the case of this embodiment, the second and third contact surfaces 20 b and 20 c are inclined surfaces that are inclined so as to become farther from the axis C of the puncture needle 34 toward the proximal end direction of the puncture device 10. According to this configuration, the puncture depth can be easily adjusted by bringing the housing 12 into contact with the skin S in an inclined state.

  In particular, in the case of the present embodiment, the second and third contact surfaces 20b and 20c are provided on opposite sides with respect to the first contact surface 20a. According to this configuration, the puncture depth can be adjusted in the same plane, that is, by changing the attitude of the housing 12 (an angle with respect to the skin S) two-dimensionally, so that the operability is excellent.

  Furthermore, in the case of the present embodiment, the housing 12 has a plurality of indicators 22a to 22c (FIGS. 1 and 3) that can be distinguished from each other as a structure indicating the puncture depth of the puncture needle 34 corresponding to the plurality of contact surfaces 20. Reference) is provided. According to this configuration, the user can easily select the puncture depth of the puncture needle 34 when using the puncture device 10.

  In the embodiment described above, the housing 12 is provided with the first to third contact surfaces 20a to 20c as the plurality of contact surfaces 20, but the number of the contact surfaces 20 is not limited to three. For example, five contact surfaces 50 may be provided as in the housing 12a according to the modification shown in FIG. Specifically, the housing 12a includes a first contact surface 50a in which the opening 19 is formed, and second to fifth contact surfaces 50b to 50e formed around the first contact surface 50a. And have.

  The first contact surface 50 a is a plane perpendicular to the axis C of the puncture needle 34. Each of the second to fifth contact surfaces 50b to 50e is connected to the first contact surface 50a, is a plane inclined with respect to the axis C of the puncture needle 34, and is the base end of the puncture device 10 The inclined surface is inclined so as to become farther from the axis C as it goes in the direction. The second contact surface 50b and the third contact surface 50c are provided on opposite sides with respect to the first contact surface 50a. The fourth contact surface 50d and the fifth contact surface 50e are positions between the second contact surface 50b and the third contact surface 50c at circumferential positions around the axis C, and One contact surface 50a is provided on the opposite side with respect to each other.

  The inclination angles of the second to fifth contact surfaces 50b to 50e with respect to the axis C of the puncture needle 34 may all be different. When the inclination angles of the second to fifth contact surfaces 50b to 50e with respect to the axis C of the puncture needle 34 are all different, the deepest puncture depth when puncturing using the first contact surface 50a is included. Thus, the puncture depth can be adjusted in five stages.

  For example, the inclination angle of the puncture needle 34 with respect to the axis C is set larger in the order of the second contact surface 50b, the third contact surface 50c, the fourth contact surface 50d, and the fifth contact surface 50e. Also good. In this case, among the second to fifth contact surfaces 50b to 50e, the puncture depth is the deepest when the second contact surface 50b is brought into contact with the skin S and the puncture is performed deeply. When the puncture is performed with the contact surface 50e in contact with the skin S, the puncture depth is the smallest.

  Alternatively, the inclination angles of the second contact surface 50b and the third contact surface 50c with respect to the axis C of the puncture needle 34 are set to be the same, and the fourth contact surface 50d with respect to the axis C of the puncture needle 34 and the fifth contact surface 50c. The inclination angles of the contact surfaces 50e are set to be the same, and the inclination angles of the second and third contact surfaces 50b and 50c are equal to the inclination angles of the fourth and fifth contact surfaces 50d and 50e. May be different. In this case, the puncture depth can be adjusted in three stages including the deepest puncture depth when puncturing using the first contact surface 50a.

  In the above description, the present invention has been described with reference to preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. Yes.

DESCRIPTION OF SYMBOLS 10 ... Puncture tool 12, 12a ... Housing 19 ... Opening part 20, 50 ... Contact surface 20a, 50a ... 1st contact surface 20b, 50b ... 2nd contact surface 20c, 50c ... 3rd contact surface 34 ... Puncture needle 50d ... Fourth contact surface 50e ... Fifth contact surface

Claims (3)

A housing having an opening;
A puncture device comprising a puncture needle that can project from the opening,
Around or near the opening of the housing, the angle is different from each other with respect to the puncture needle, the plurality of abutting surfaces for abutting the provided we are in the skin,
The plurality of contact surfaces include a first contact surface provided with the opening, a second contact surface adjacent to the first contact surface, and the second contact surface. A third abutment surface adjacent to the first abutment surface at a different position;
The second and third contact surfaces are inclined surfaces that are inclined so as to become farther from the axis of the puncture needle toward the proximal end direction of the puncture device.
A puncture device characterized by that. The puncture device according to claim 1 , wherein
The second and third contact surfaces are provided on opposite sides of the first contact surface;
A puncture device characterized by that. A housing having an opening;
A puncture needle that can protrude from the opening,
Around the vicinity of the opening of the housing, the angle with respect to the puncture needle is different from each other, provided with a plurality of contact surfaces to contact the skin,
The housing is provided with a structure indicating the puncture depth of the puncture needle according to the plurality of contact surfaces.
A puncture device characterized by that.

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