Blood collection device

Abstract

To provide a blood collection device that allows for the removal and attachment of a blood collection tray while reducing the cost and improving the recyclability of the tray. [Solution] The blood collection device 1 comprises a resin tray 40 on which a blood bag 3 is placed, a tray mounting section 60 to which the tray 40 is attached, and a rocking mechanism 50 that rocks the tray 40 via the tray mounting section 60. The tray 40 has a rib section 46 extending in one direction on the plane on which the blood bag 3 is placed, and a restricting section 47 provided on the rib section 46 that engages with the tray mounting section 60 to restrict the movement of pulling the tray 40 away from the tray mounting section 60. The tray mounting section 60 has positioning sections 62 and 64 that position the tray 40 in one direction using the rib section 46.

Description

Technical Field

[0001] The present invention relates to a blood collection device.

Background Art

[0002] Conventionally, when collecting blood, a blood collection device used for mixing the collected blood with an anticoagulant in a blood bag is known. This type of blood collection device is proposed, for example, to include a swing mechanism that swings a tray on which a blood bag is placed, and the tray is fixed to the swing mechanism or configured to be detachable (see, for example, Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when the tray and the swing mechanism are fixed with screws or the like, the user cannot easily remove the tray by hand, and when an object falls into the gap between the housing and the tray, the dropped object cannot be recovered promptly.

[0005] k On the other hand, in the case of a detachable mechanism that fixes the tray to the swing mechanism by magnetism, a magnetic body such as an iron plate is attached to the tray. However, the compatibility with an alcohol disinfectant containing hypochlorous acid or chloride (such as benzalkonium chloride) for cleaning or disinfecting the blood attached to the tray is poor, and rust may occur when the disinfectant touches the iron plate, which may adversely affect other members.

[0006] Furthermore, if the tray is constructed using a combination of metal and resin, the cost of replacement parts will be high, and the mixture of resin and metal will make it difficult to dispose of and unsuitable for recycling.

[0007] Therefore, the present invention has been made in view of the above circumstances, and aims to provide a blood collection device that can detachably fix a blood collection tray while reducing the cost and improving the recyclability of the tray. [Means for solving the problem]

[0008] A blood collection device according to one aspect of the present invention comprises a resin tray on which a blood bag is placed, a tray mounting section to which the tray is attached, and a rocking mechanism for rocking the tray via the tray mounting section. The tray has rib portions extending in one direction on the plane on which the blood bag is placed, and restricting portions provided on the rib portions that engage with the tray mounting section to restrict the movement of pulling the tray away from the tray mounting section. The tray mounting section has a positioning portion that positions the tray in one direction using the rib portions. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a blood collection device that allows for the removal and attachment of a blood collection tray while reducing the cost and improving the recyclability of the tray. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view of the external appearance of the blood collection device according to this embodiment. [Figure 2] This is a cross-sectional view along line AA in Figure 1. [Figure 3] This is a plan view of the blood collection device with the top cover and tray removed. [Figure 4] This is a schematic plan view of the serving tray. [Figure 5] (a) is a cross-sectional view of the tray shown in Figure 4 along line BB, and (b) is a diagram showing the tray shown in Figure 5(a) when it is attached to the tray mounting section. [Figure 6](a) and (b) are diagrams showing the attachment of the tray to the tray mounting section. [Figure 7] This figure shows a first modified example of the mounting plate and the mounting plate mounting part. [Figure 8] This figure shows a second modified example of the mounting plate and the mounting plate mounting part. [Figure 9] This figure shows a third modified example of the mounting plate and the mounting plate mounting part. [Modes for carrying out the invention]

[0011] The following describes an example of the configuration of the blood collection device according to this embodiment, with reference to the drawings. Note that the shapes and dimensions of each part in the drawings are schematic and do not represent the actual shapes and dimensions.

[0012] Figure 1 is an external perspective view of the blood collection device of this embodiment. Figure 2 is a cross-sectional view taken along line AA in Figure 1. Figure 3 is a plan view of the blood collection device with the top cover and tray removed.

[0013] The blood collection device 1 of this embodiment is used to mix the collected blood with the anticoagulant pre-filled in the blood bag 3 by shaking the blood bag 3 when collecting blood. The blood collection device 1 comprises a housing 10, a top lid 20, an operating unit 30, a tray 40, and a shaking mechanism 50.

[0014] The housing 10 is a box-shaped structure with an open top, and the top of the housing 10 is closed by a top cover 20. The top cover 20 is made of, for example, a transparent resin (such as acrylic resin) and is attached to the housing 10 so as to be openable and closable by a hinge 26 provided on the rear side of the device.

[0015] On the front side of the device, the top cover 20 is provided with a handle 22, and the top cover 20 can be opened, for example, by releasing the top cover locking mechanism (not shown) and lifting the handle 22.

[0016] In addition, a placing tray 40 and a swing mechanism 50 are housed in the suction chamber 2 surrounded by the housing 10 and the upper lid 20. Inside the housing 10, a decompression mechanism (not shown) for decompressing the inside of the suction chamber 2 surrounded by the housing 10 and the upper lid 20, a power supply unit (not shown) for supplying power to each part, a control unit (not shown) for overall control of each part of the blood collection device 1, etc. are housed.

[0017] The above decompression mechanism includes a vacuum pump and a valve for adjusting the air flow rate. The control unit drives the decompression mechanism to generate a suction pressure (negative pressure) in the suction chamber 2 and collect blood into the blood bag 3. Note that the control unit can control the suction pressure by the vacuum pump and valve of the decompression mechanism.

[0018] The operation unit 30 is composed of, for example, a liquid crystal touch panel and is arranged on the front side of the device of the housing 10. The screen display of the operation unit 30 is controlled by the control unit. For example, the user can obtain various information based on the character information or image information displayed on the screen of the operation unit 30. On the screen of the operation unit 30, for example, the blood collection volume or the remaining blood collection volume is displayed during blood collection. In addition, on the screen of the operation unit 30, a display (such as color display) indicating the situation such as the blood collection speed is performed. Also, by the operation of the user touching the icon image of the operation unit 30, the operation unit 30 accepts various operations such as blood collection start and blood collection stop.

[0019] Note that the input to the blood collection device 1 is not limited to the above, and may be received by an input device (such as a barcode reader, etc.) connected via a connection terminal not shown. Also, various outputs from the blood collection device 1 may be performed from a known output device connected via the above connection terminal.

[0020] FIG. 4 is a schematic plan view of the placing tray 40. FIG. 5(a) is a cross-sectional view taken along line B-B of the placing tray 40 in FIG. 4, and FIG. 5(b) is a view showing the state when the placing tray 40 in FIG. 5(a) is attached to the placing tray attachment portion 60.

[0021] The tray 40 is detachably attached to the rocking mechanism 50, and during blood collection, the blood bag 3 is placed on its upper surface as shown in Figure 2. The tray 40 is formed as a flat-bottomed bowl-shaped container with a roughly rectangular shape in plan view and a predetermined depth in the vertical direction. The tray 40 is made of a resin material such as acrylic resin, polyethylene terephthalate (PET), or polyvinyl chloride resin, and is transparent overall. The tray 40 also has a roughly rectangular bottom portion 41a and a peripheral wall portion 41b erected on the outer circumference of the bottom portion 41a.

[0022] Furthermore, the tray 40 has rib portions 46 that protrude outward (towards the bottom surface of the tray 40) from the bottom surface portion 41a. The rib portions 46 are formed in the center of the short side of the tray 40 and extend along the long side direction of the bottom surface of the tray 40. The rib portions 46 reinforce the bottom surface portion 41a of the tray 40 in the long side direction and are also used as a guide when attaching the tray 40 to the tray mounting portion 60 of the rocking mechanism 50, which will be described later. In addition, the inside of the rib portions 46 may house, for example, a part of the blood bag 3 placed on the tray 40 or a part of a component connected to the blood bag 3 (for example, a leukocyte removal filter).

[0023] Furthermore, the rib portion 46 is provided with flanges 47 that engage with the tray mounting portion 60. The flanges 47 are formed on both sides of the rib portion 46 at the mounting position with the tray mounting portion 60 (the longitudinal center of the rib portion 46). Each flange 47 protrudes outward from the rib portion 46 substantially parallel to the bottom surface portion 41a of the tray 40 and is formed to extend in the longitudinal direction of the rib portion 46 in a plan view. The flanges 47 also function as an example of a restricting part that engages with the slot 63 described later to restrict the movement of pulling the tray 40 away from the tray mounting portion 60.

[0024] Furthermore, the rib portion 46 has a positioning hole 48 formed therein that receives the locking piece 64 of the tray mounting portion 60, which will be described later. For example, the positioning hole 48 is formed on the bottom side of the rib portion 46 at a position corresponding to the locking piece 64 when the tray 40 is attached to the tray mounting portion 60 (see Figure 8(b)). Note that the positioning hole 48 does not need to penetrate the tray 40 as long as it can receive the locking piece 64.

[0025] Any mechanism that can swing the tray 40 can be applied to the rocking mechanism 50. For example, although not shown in the figures, a motor or power transmission mechanism can be used to change the posture of the tray 40 and make the tray 40 rock in a predetermined direction.

[0026] The tray mounting portion 60 is a member to which the tray 40 is attached on its upper surface, and in this embodiment, it is formed in a rectangular shape. The tray mounting portion 60 is connected to the rocking mechanism 50, and the rocking mechanism 50 drives the tray 40 to rock.

[0027] Figures 6(a) and 6(b) show the mounting of the tray 40 to the tray mounting section 60. The upper surface of the tray mounting portion 60 contacts the bottom surface of the tray 40 to support the tray 40. A receiving groove 62 is formed on the upper surface of the tray mounting portion 60 to receive the rib portion 46 of the tray 40. The receiving groove 62 extends from one side to the other on the upper surface of the tray mounting portion 60, and the width and depth of the receiving groove 62 are formed to correspond to the dimensions of the rib portion 46 of the tray 40. As a result, when the tray 40 is attached to the tray mounting portion 60, the receiving groove 62 can accommodate a portion of the rib portion 46 that extends in the longitudinal direction of the tray 40.

[0028] Furthermore, the mounting plate portion 60 has a slot 63 formed on one side of the receiving groove 62 into which the flange 47 of the mounting plate 40 is inserted. As shown in Figure 5(b), the slot 63 is formed on both sides in the width direction of the receiving groove 62 with dimensions that can accommodate the flange 47. The slot 63 restricts the movement of the mounting plate 40 from being pulled away from the mounting plate portion 60 by engaging with the flange 47. In addition, the receiving groove 62 limits the movement of the mounting plate 40 to sliding in the direction of extension of the rib portion 46, and thus functions as an example of a positioning part that positions the mounting plate 40 in one direction on a plane.

[0029] Furthermore, the receiving groove 62 of the mounting plate section 60 is provided with a locking piece 64 that positions the mounting plate 40 when the flange 47 is inserted into the slot 63. The locking piece 64 is an example of a positioning part that positions the mounting plate 40 in one direction on a plane. The locking piece 64 is configured to be able to move back and forth relative to the rib section 46, for example, supported by a spring, and engages with the positioning hole 48 of the mounting plate 40. When the mounting plate 40 is installed, the locking piece 64 engages with the positioning hole 48, which prevents the mounting plate 40 from unintentionally shifting to one side of the mounting plate section 60 and falling off. Alternatively, a switch or the like that can be connected to the locking piece 64 to detect the installation of the mounting plate 40, so that the control unit can detect the installation status of the mounting plate 40.

[0030] The engagement of the locking piece 64 with the positioning hole 48 can be released by, for example, providing a release mechanism (not shown) in the tray mounting portion 60 that retracts the locking piece 64, and releasing the engagement by operating the release mechanism. Alternatively, if the positioning hole 48 is formed through the tray 40, the engagement can also be released by pressing the locking piece 64 from the inside of the tray 40 with a finger or the like.

[0031] To attach the tray 40 to the tray mounting section 60, as shown in Figure 6(a), the rib portion 46 is aligned with the receiving groove 62, and then the tray 40 is slid into one side of the tray mounting section 60. Then, as shown in Figure 6(b), the flange 47 of the tray 40 is inserted into the slot 63 of the tray mounting section 60, and the locking piece 64 engages with the positioning hole 48. This attaches the tray 40 to the tray mounting section 60.

[0032] In this state, with the mounting plate 40 attached to the mounting plate mounting section 60, the flange 47 inserted into the slot 63 restricts the vertical movement of the mounting plate 40. In other words, if a force is applied to the mounting plate mounting section 60 that would pull the mounting plate 40 vertically, the flange 47 will interfere with the slot 63, thus preventing the mounting plate 40 from detaching.

[0033] Furthermore, when the tray 40 is attached to the tray mounting section 60, the flange 47 inserted into the slot 63 and the rib portion 46 housed in the receiving groove 62 restrict the planar movement of the tray 40, except in the direction that would cause it to slide. Also, when the tray 40 is attached to the tray mounting section 60, the engagement of the positioning hole 48 and the locking piece 64 positions the tray 40 so that it does not slide. Therefore, if a force is applied to the tray mounting section 60 that would cause the tray 40 to move in the planar direction, the flange 47 inserted into the slot 63, the rib portion 46 housed in the receiving groove 62, and the engagement of the positioning hole 48 and the locking piece 64 can prevent the tray 40 from shifting in the planar direction.

[0034] Furthermore, when the mounting plate 40 swings as described later, a shear load in the planar direction of the mounting plate 40 acts between the mounting plate mounting portion 60 and the mounting plate 40. At this time, the side surface of the rib portion 46 housed in the receiving groove 62 receives the above-mentioned shear load, increasing the area of ​​the part of the mounting plate 40 that receives the shear load, and mitigating stress concentration of the mounting plate 40 during swinging. Therefore, the durability of the mounting plate 40 can also be improved.

[0035] The control unit determines the current blood volume based on the weight of the blood bag 3 detected by a weight sensor (not shown) and can stop blood collection when the target volume is reached. The control unit can also calculate the blood collection rate per unit time based on the weight of the blood bag 3. If the blood collection rate is slow and below a predetermined value, the control unit takes measures such as lowering the suction pressure. Conversely, if the blood collection rate is faster than a predetermined value, the control unit takes measures such as increasing the suction pressure. This makes it possible to perform blood collection in accordance with the dynamics of the donor (blood donor) being collected.

[0036] The effects of the blood collection device 1 of this embodiment will be described below. The blood collection device 1 of this embodiment includes a resin tray 40 on which a blood bag 3 is placed, a tray mounting section 60 to which the tray 40 is attached, and a swinging mechanism 50 that swings the tray 40 via the tray mounting section 60. The tray 40 has a rib portion 46 extending in one direction on the plane on which the blood bag 3 is placed, and a flange 47 (restricting portion) that engages with the rib portion 46 to restrict the movement of pulling the tray 40 away from the tray mounting section 60. The tray mounting section 60 has a receiving groove 62 and a locking piece 64 (positioning portion) that position the tray 40 in one direction using the rib portion 46. In the blood collection device 1 of this embodiment, the flange 47 of the rib portion 46 of the tray 40 restricts the movement of peeling off the tray 40, and the receiving groove 62 and locking piece 64 of the tray mounting portion 60 position the tray 40 in the planar direction using the rib portion 46. Therefore, in this embodiment, the structure of the resin rib portion 46 allows the tray 40 to be detachably fixed to the tray mounting portion 60, and the cost of the tray 40 can be reduced by eliminating the need for metal members (e.g., iron plates) for attaching and detaching the tray 40, and furthermore, the problem of rust generation due to disinfectant solution does not occur. In addition, since material sorting is not required at the time of disposal, recyclability is also improved. In this way, it is possible to provide a blood collection device 1 that allows for the removal and attachment of the tray 40 while reducing the cost and improving the recyclability of the tray 40.

[0037] Furthermore, the tray 40 has a rectangular bottom surface 41a, and the rib portion 46 extends in the direction of the longer side of the tray 40. Therefore, the tray 40 can be effectively reinforced by the formation of the rib portion 46, thereby improving the durability of the tray 40.

[0038] Furthermore, the rib portion 46 protrudes outward from the bottom surface portion 41a of the mounting plate 40, and the mounting plate mounting portion 60 has a receiving groove 62 that accommodates the rib portion 46. By accommodating the rib portion 46 with the receiving groove 62, the area of ​​the part that receives the shear load is increased in relation to the shear load acting on the mounting plate 40 in the planar direction during oscillation, thereby mitigating stress concentration on the mounting plate 40 during oscillation. This improves the durability of the mounting plate 40 against oscillation.

[0039] Furthermore, the tray 40 is attached to the tray mounting section 60 by sliding it along the extension direction of the receiving groove 62. This allows for smooth attachment and detachment of the tray 40 in the blood collection device 1, improving user convenience.

[0040] Furthermore, in this embodiment, when attaching the tray 40 to the tray mounting section 60, the worker can easily attach the back side of the tray 40 to the tray mounting section 60 by looking through the transparent tray 40 from above. At this time, by housing the rib portion 46 in the receiving groove 62, it is possible to allow the worker to intuitively and correctly understand how to attach the tray 40.

[0041] The present invention is not limited to the embodiments described above, and various improvements and design modifications may be made without departing from the spirit of the invention. For example, the configuration of the mounting plate 40 and the mounting plate mounting part 60 may be as follows.

[0042] Figure 7 shows a first modified example of the mounting plate and the mounting plate mounting section. In the first modified example, the rib portion 46 of the mounting plate 40a is inserted into the receiving groove 62 from the upper side of the mounting plate mounting section 60a, and the mounting plate 40a is attached to the mounting plate mounting section 60a.

[0043] In the first modified example, claw portions 65 are formed on both sides of the receiving groove 62 of the mounting plate portion 60a. In addition, notches 46a that engage with the claw portions 65 are formed in the rib portion 46 of the mounting plate 40a. The claw portions 65 and notches 46a are provided in pairs, for example, at predetermined positions in the longitudinal direction, but they may also be provided at multiple locations.

[0044] When the rib portion 46 of the tray 40a is accommodated in the receiving groove 62 of the tray mounting portion 60a, the claw portion 65 and the notch 46a engage. The engagement of the claw portion 65 and the notch 46a restricts the movement of pulling the tray 40a away from the tray mounting portion 60a. Furthermore, when the rib portion 46 is accommodated in the receiving groove 62, the engagement of the claw portion 65 and the notch 46a positions the tray 40a in the planar direction. Therefore, even in the configuration of the first modified example, the structure of the resin rib portion 46a allows the tray 40a to be detachably fixed to the tray mounting portion 60a, achieving the same effects as in the above embodiment.

[0045] Figure 8 shows a second modified example of the mounting plate and the mounting plate mounting section. In the second modified example, the rib portion 46 of the mounting plate 40b is inserted into the receiving groove 62 from the upper side of the mounting plate mounting section 60b, and the mounting plate 40b is attached to the mounting plate mounting section 60b using screws as well.

[0046] In the second modified example, a claw portion 65 is formed on one side (right side in Figure 8) of the receiving groove 62 of the mounting plate portion 60b. Additionally, a screw hole 66 is formed on the outside of the receiving groove 62 of the mounting plate portion 60b, near the other side of the receiving groove 62.

[0047] Furthermore, a notch 46a is formed in the rib portion 46 of the mounting plate 40b to engage with the claw portion 65. And a hole 41c is formed in the bottom surface portion 41a of the mounting plate 40b for inserting a screw 70.

[0048] In the second modified example, when the rib portion 46 of the tray 40b is fitted into the receiving groove 62 of the tray mounting portion 60b, the claw portion 65 and the notch 46a engage. Then, a screw 70 is screwed into the hole 41c of the tray 40b and the screw hole 66 of the tray mounting portion 60b, thereby fixing the tray mounting portion 60b and the tray 40b together. A resin screw or a stainless steel screw can be used for the screw 70.

[0049] In the second modified configuration, the engagement of the claw portion 65 and the notch 46a restricts the movement of pulling the tray 40b away from the tray mounting portion 60b. Furthermore, by engaging the claw portion 65 and the notch 46a with the rib portion 46 housed in the receiving groove 62 and fastening them with screws, the tray 40b is positioned in the planar direction. Therefore, even in the configuration of the second modified configuration, the tray 40b can be detachably fixed to the tray mounting portion 60b, and by combining the rib portion 46 and the screws 70, the ease of attaching and detaching the tray 40b can be improved compared to fixing it with screws 70 alone. In addition, the amount of screws 70 used can be reduced, and since the tray 40b and screws 70 can be easily separated, recycling is also easy.

[0050] Figure 9 shows a third modified example of the tray and tray mounting section. In the third modified example, the tray 40c is attached to the tray mounting section 60c which has a stepped portion 62a.

[0051] In the third modified example, a claw portion 65 is formed on the side surface (right side in Figure 9) of the stepped portion 62a of the mounting plate portion 60c. Additionally, a screw hole 66 is formed on the upper side of the mounting plate portion 60b.

[0052] Furthermore, a notch 46a is formed on one side of the rib portion 46 of the mounting plate 40c to engage with the claw portion 65. In addition, a hole 41c for inserting a screw 70 is formed in the bottom portion 41a of the mounting plate 40c.

[0053] In the third modified example, the rib portion 46 of the mounting plate 40c is placed on the stepped portion 62a of the mounting plate mounting portion 60c, and the claw portion 65 and the notch 46a are engaged. Then, the screw 70 is screwed into the hole 41c of the mounting plate 40c and the screw hole 66 of the mounting plate mounting portion 60c, thereby fixing the mounting plate mounting portion 60c and the mounting plate 40c. In the third modified example as well, the screw 70 can be made of resin, stainless steel, or the like.

[0054] In the third modified example, the engagement and screw fastening of the claw portion 65 and the notch 46a restricts the movement of pulling the tray 40c away from the tray mounting portion 60c and positions the tray 40c in the planar direction. In the configuration of the third modified example, the tray 40c can be detachably fixed to the tray mounting portion 60c, and by combining the rib portion 46 and the screw 70, the ease of attaching and detaching the tray 40c can be improved compared to fixing it with the screw 70 alone. Furthermore, the amount of screw 70 used can be reduced, and since the tray 40c and the screw 70 can be easily separated, recycling is also easy.

[0055] In the third modification, the tray 40c is fixed to the tray mounting portion 60c by screwing it in with the claw portion 65 and the notch 46a engaged, and the tray 40c is held stably. Therefore, in the third modification, if the tray 40c is not screwed in or is not screwed in properly, it will fall off, making it easy to check that the tray is screwed in properly.

[0056] In the above embodiment, the mounting plate 40 is provided with a rib portion 46 (flange 47) and the mounting plate mounting portion 60 is provided with a receiving groove 62. However, for example, although not shown in the figures, the mounting plate mounting portion 60 may be provided with a rib portion (flange) and the mounting plate 40 may be provided with a receiving groove. Similarly, the positioning holes 48 and locking pieces 64 for positioning the mounting plate 40 may be reversed between the mounting plate 40 and the mounting plate mounting portion 60.

[0057] Furthermore, the embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims rather than by the foregoing description, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of Symbols]

[0058] 1... Blood collection device, 2... Suction chamber, 3... Blood bag, 10... Housing, 20... Top cover, 40, 40a, 40b, 40c... Mounting tray, 41a... Bottom section, 46... Rib section, 46a... Notch, 47... Flange, 50... Swivel mechanism, 60, 60a, 60b, 60c... Mounting tray mounting section, 62... Receiving groove, 63... Slot, 64... Locking piece, 65... Claw section, 70... Screw

Claims

1. A resin tray on which to place the blood bag, A tray mounting section to which the tray is attached, The system includes a rocking mechanism that rocks the tray via the tray mounting portion, The aforementioned tray is A rib portion extending in one direction on the plane on which the blood bag is placed, The rib portion is provided with a restricting portion that engages with the tray mounting portion to restrict the movement of the tray being pulled away from the tray mounting portion, The tray mounting portion has a positioning portion that uses the rib portion to position the tray in one direction. Blood collection device.

2. The aforementioned serving plate has a rectangular bottom surface. The rib portion extends in the direction of the long side of the serving plate. The blood collection device according to claim 1.

3. The rib portion protrudes outward from the bottom surface of the tray, The aforementioned mounting plate portion has a groove for accommodating the rib portion. The blood collection device according to claim 2.

4. The tray is attached to the tray mounting portion by sliding the tray along the extension direction of the groove. The blood collection device according to claim 3.

5. The aforementioned tray is attached to the tray mounting portion by inserting the rib portion of the tray into the groove from the top side. The blood collection device according to claim 3.

6. The positioning portion has a locking piece that engages with a positioning hole provided in the tray, When the tray is attached to the tray mounting portion, the locking piece engages with the positioning hole by sliding the tray. The blood collection device according to claim 4.

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