A fixing device suitable for venipuncture of children

Abstract

The application discloses a fixing device suitable for venipuncture of children and belongs to the technical field of medical treatment. The fixing device comprises a remaining mechanism and a puncture needle, the remaining mechanism comprises a connecting head and a remaining needle sleeve, one end of the remaining needle sleeve is connected with the connecting head and communicates with the connecting head, the puncture needle is located in the remaining needle sleeve, and one end of the puncture needle close to the connecting head is provided with a self-withdrawal puncture mechanism. In the application, when puncturing, medical staff can fix the arm of a sick child with one hand and perform puncture operation on the sick child with the other hand. When withdrawing the needle, the self-withdrawal puncture mechanism can drive the puncture needle to withdraw, so that the operation is simple, the medical staff ratio is reduced, and the self-withdrawal puncture mechanism cooperates with the fixing mechanism. The remaining mechanism can be adhered to the skin of a patient through the adhesive layer on the fixing block, so that the remaining mechanism can be preliminarily fixed, and the position of the remaining mechanism is prevented from deviating.

Description

TECHNICAL FIELD

[0001] The present application relates to the medical technical field, more particularly, to a fixing device suitable for venipuncture of children. BACKGROUND

[0002] Puncture is a kind of diagnosis and treatment technology that puncture needle is inserted into body cavity to extract secretion for testing, inject gas or contrast medium for contrast examination, or inject drug into body cavity. The purpose of puncture is to extract blood for testing, transfusion, infusion and catheterization for angiography.

[0003] At present, when treating children patients, indwelling needle is often used for infusion of children patients. Venous indwelling needle, also known as cannula needle, is one of the main tools for clinical infusion. The venous indwelling needle is simple to operate, and the indwelling limb is convenient to move, which can reduce repeated venipuncture and alleviate the pain of children, and is loved by children's parents and widely used in pediatric wards.

[0004] However, the indwelling needle needs to be withdrawn after puncture. Since children have low pain tolerance and low cooperation, they are prone to restlessness during venipuncture, which is not convenient for needle withdrawal. Therefore, additional medical staff is needed to fix the puncture site of the children to safely withdraw the needle. Therefore, when treating children, the required medical staff ratio is high, and it is easy to have insufficient staff. SUMMARY

[0005] In view of the problem in the prior art that single medical staff cannot operate with one hand when withdrawing the needle during puncture of children, additional medical staff is needed to fix the children to safely withdraw the needle, and the required medical staff ratio for children treatment is high and it is easy to have insufficient staff, the purpose of the present application is to provide a fixing device suitable for venipuncture of children.

[0006] To solve the above problems, the present application adopts the following technical scheme.

[0007] A fixing device suitable for venipuncture of children, comprising an indwelling mechanism and a puncture needle, the indwelling mechanism comprising a connecting head and an indwelling needle sleeve, one end of the indwelling needle sleeve being connected with the connecting head and communicating therewith, the puncture needle being located inside the indwelling needle sleeve, and one end of the puncture needle close to the connecting head being provided with a self-withdrawal puncture mechanism, the self-withdrawal puncture mechanism enabling the puncture needle to automatically withdraw from the indwelling needle sleeve;

[0008] The fixed mechanism comprises a fixed block, an adhesive layer, a film and a connecting belt, the fixed block is fixedly connected with the connecting head, the adhesive layer is arranged on the surface of the fixed block, the film is adhered to the surface of the adhesive layer, one end of the connecting belt is connected with the film, and the other end of the connecting belt is arranged on the surface of the self-withdrawing puncture mechanism; when the self-withdrawing puncture mechanism is separated from the connecting head, the connecting belt can open the film, so that the adhesive layer is in contact with the skin of the patient.

[0009] Optionally, the self-withdrawing puncture mechanism comprises a shell, a first spring, a connecting seat and a connecting rod, the shell is connected with the connecting head through a buckle mechanism, the connecting seat is located in the shell, the connecting seat is fixedly connected with the puncture needle, and one end of the connecting rod is fixedly connected with the connecting seat; the connecting rod is slidably arranged in the shell, the first spring is arranged on the surface of the connecting rod, one end of the first spring is fixedly connected with the connecting seat, and the other end of the first spring is fixedly connected with the inner surface of the shell; and one end of the connecting rod is provided with a limiting mechanism, and the first spring is in a stretched state when the connecting rod is limited by the limiting mechanism.

[0010] Optionally, the limiting mechanism comprises a sliding seat, a limiting rod, a limiting hole and a rubber block, the sliding seat is arranged on the surface of the shell, and the limiting hole is arranged at one end of the connecting rod; the limiting rod is slidably connected to the sliding seat, one end of the limiting rod is located in the limiting hole, and the end of the limiting rod is fixedly connected with the rubber block.

[0011] Optionally, the buckle mechanism comprises a slot arranged on the connecting head, and a plug plate fixedly connected with the slot is arranged on the shell; a sliding groove is arranged in the connecting head, the sliding groove is perpendicular to the slot and communicates with the slot, a clamping plate is slidably arranged in the sliding groove, a clamping groove matched with the clamping plate is arranged on the surface of the plug plate, one end of the clamping plate is located in the clamping groove, the other end of the clamping plate is connected with the sliding groove through a second spring, a moving plate is fixedly connected to the surface of the clamping plate, one end of the moving plate is located outside the connecting head, a moving groove matched with the moving plate is arranged in the connecting head, and a control mechanism is arranged on the surface of the connecting head, the control mechanism is used for controlling the movement of the moving plate and driving the clamping plate to move out of the clamping groove.

[0012] Optionally, the buckle mechanism is provided with at least three groups, and the three groups of buckle mechanisms are arranged in an annular array, and a synchronous moving mechanism is arranged between the three groups of buckle mechanisms, so that the three groups of clamping plates can move simultaneously.

[0013] Optionally, the synchronous moving mechanism comprises a ring-shaped slot formed in the connecting head, the surfaces of the clamping plates are fixedly connected with gear plates, double-head gears corresponding to the gear plates are arranged in the ring-shaped slot, and the double-head gears are arranged in meshing relationship with the gear plates, and a gear ring is rotatably connected in the ring-shaped slot and located above the gear plates, and the double-head gears are arranged in meshing relationship with the gear ring.

[0014] Optionally, the control mechanism comprises a guide rod, one end of the guide rod is slidably connected with the connecting head and provided with a blocking mechanism, the other end of the connecting head is fixedly connected with a positioning block, the positioning block is arranged in the moving direction of the moving plate, a third spring is connected between the surface of the positioning block and the connecting head, the third spring is sleeved on the guide rod and has a stretching shape, a thimble is formed in the positioning block, a rubber plug is arranged in the thimble, a pull rod is fixedly connected to the surface of the rubber plug, a top block is connected to the upper end of the pull rod through a connecting plate, and the top block is slidably connected with the shell and located at the end of the connecting seat.

[0015] Optionally, the blocking mechanism comprises a rubber sleeve, a groove body, a push block and a receiving groove, the rubber sleeve is sleeved on the surface of the puncture needle, one end of the rubber sleeve is fixedly connected with the connecting head, one end of the push block is fixedly connected with the guide rod, and the receiving groove is formed in the lower surface of the push block and used for folding and storing the rubber sleeve, and the groove body is formed in the side wall of the connecting head and located at the end of the push block.

[0016] Optionally, a groove is formed in the upper surface of the push block, a wedge-shaped block is slidably connected in the groove, a pressing rod is fixedly connected to the lower end of the wedge-shaped block, the lower end of the pressing rod penetrates through the bottom surface of the groove and is fixedly connected with a pressing plate, a fourth spring is sleeved on the surface of the pressing rod, one end of the fourth spring is fixedly connected with the wedge-shaped block, and the other end of the fourth spring is fixedly connected with the bottom surface of the groove.

[0017] Optionally, the retaining mechanism further comprises a connecting pipe and a Y-shaped joint, and the connecting pipe is used for connecting the Y-shaped joint with the connecting head.

[0018] Compared with the prior art, the technical scheme provided by the application has at least the following beneficial effects:

[0019] In the above scheme, when the medical staff performs puncture, one hand of the medical staff can fix the arm of the child, and the other hand of the medical staff can perform puncture operation on the child, the self-withdrawal puncture mechanism is arranged, the puncture needle can be withdrawn by using the self-withdrawal puncture mechanism when the needle is withdrawn, the operation is simple, and the ratio of medical staff is reduced.

[0020] Through cooperation of the self-withdrawing puncture mechanism and the fixing mechanism, the self-withdrawing puncture mechanism pulls the connecting belt during withdrawing the puncture needle, and the connecting belt can lift the covering film, and the remaining mechanism can be adhered to the skin of the patient through the adhesive layer on the fixing block, so that the remaining mechanism can be preliminarily fixed, and position deviation of the remaining mechanism is prevented.

[0021] Through the limiting mechanism, the puncture needle operation only needs to pull out the limiting rod, and the operation is simple and convenient for one-handed operation.

[0022] Through the shell body, the withdrawn puncture needle enters the inside of the shell body, so that the sharp part of the puncture needle is hidden, and the safety during withdrawing the puncture needle is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the application and, together with the description, further serve to explain the principles of the application and to enable a person skilled in the relevant art to make and use the application.

[0024] Figure 1 is a schematic diagram of a three-dimensional structure of the application;

[0025] Figure 2 is a schematic diagram of a structure of the remaining mechanism in the application; Figure 1

[0026] Figure 3 is a sectional view of the self-withdrawing puncture mechanism in the application; Figure 1

[0027] Figure 4 is a schematic diagram of a structure of the limiting mechanism in the application; Figure 3

[0028] Figure 5 is a schematic diagram of a structure of the control mechanism in the application; Figure 3

[0029] Figure 6 is a schematic diagram of a structure of the synchronous moving mechanism in the application; Figure 3

[0030] Figure 7 is an enlarged view of A in the application; Figure 1

[0031] Figure 8 is an enlarged view of B in the application; Figure 5 ​​​​​​​

[0032] Figure 9 Enlarged view of C in the present application Figure 5 Enlarged view of C in the present application

[0033] Figure 10 Enlarged view of D in the present application Figure 6 Enlarged view of D in the present application

[0034] [Reference signs]

[0035] 1. A retaining mechanism; 11. A connecting head; 12. A retaining needle cover; 13. A connecting tube; 14. A Y-shaped joint;

[0036] 2. A self-retracting puncture mechanism; 21. An outer housing; 22. A first spring; 23. A connecting seat; 24. A connecting rod;

[0037] 3. A limiting mechanism; 31. A sliding seat; 32. A limiting rod; 33. A limiting hole; 34. A rubber block;

[0038] 4. A clamping mechanism; 41. An insertion slot; 42. An insertion plate; 43. A clamping slot; 44. A clamping plate; 45. A sliding slot; 46. A second spring; 47. A moving slot; 48. A moving plate;

[0039] 5. A control mechanism; 51. A positioning block; 52. An insertion hole; 53. A rubber plug; 54. A pull rod; 55. A third spring; 56. A guide rod; 57. A connecting plate; 58. A top block;

[0040] 6. A synchronous moving mechanism; 61. An annular slot; 62. A gear ring; 63. A double-headed gear; 64. A toothed plate;

[0041] 7. A plugging mechanism; 71. A rubber sleeve; 72. A slot body; 73. A push block; 74. A receiving slot; 75. A wedge-shaped block; 76. A groove; 77. A pressing plate; 78. A pressing rod; 79. A fourth spring;

[0042] 8. A fixing mechanism; 81. A fixing block; 82. An adhesive layer; 83. A film covering; 84. A connecting belt;

[0043] 9. A puncture needle.

[0044] As shown in the drawings, in order to clearly realize the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the present application in the specific structures, devices and environments, and those skilled in the art can adjust or modify these devices and environments according to specific needs. DETAILED DESCRIPTION

[0045] The fixing device for children's venipuncture provided by the present application is described in detail below in combination with the drawings and specific embodiments. It should be noted that, in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and other alternative ways can also be adopted by those skilled in the art for implementation; and the drawings are only used to describe the embodiments in more detail, and are not intended to specifically limit the present application.

[0046] It should be noted that the terms "one embodiment", "an embodiment", "exemplary embodiment", "some embodiments", etc. in the description indicate that the described embodiments can include a specific feature, structure or characteristic, but not necessarily every embodiment includes the specific feature, structure or characteristic. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it should be within the knowledge of those skilled in the related art to implement such a feature, structure or characteristic in combination with other embodiments, whether or not it is explicitly described.

[0047] Generally, the terms can be understood at least in part from the context in which they are used. For example, depending on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular or can be used to describe combinations of features, structures, or characteristics, in the plural, without necessarily dictating whether any such feature, structure, or characteristic is required, singular, or plural. Additionally, the term "based on" can be understood as not necessarily of a set of exclusive factors, but, alternatively, as allowing for existence of additional factors not necessarily explicitly described.

[0048] It can be understood that the meanings of "on", "above", and "over" in the present application should be interpreted in the broadest way, so that "on" not only means "directly on" something, but also includes the meaning of "on" something with intervening features or layers therebetween, and "above" or "over" not only means the meaning of "above" or "over" something, but also can include the meaning of "above" or "over" something without intervening features or layers therebetween.

[0049] In addition, spatially relative terms such as "under", "below", "lower", "over", "upper", and the like can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein can be interpreted accordingly.

[0050] As Figures 1 to 10As shown, the embodiment of the present application provides a fixing device suitable for venipuncture of children, which comprises a remaining mechanism 1 and a puncture needle 9, the remaining mechanism 1 comprises a connecting head 11 and a remaining needle sleeve 12, one end of the remaining needle sleeve 12 is connected with the connecting head 11 and communicates with the connecting head 11, the puncture needle 9 is located inside the remaining needle sleeve 12, and one end of the puncture needle 9 close to the connecting head 11 is provided with a self-withdrawal puncture mechanism 2, the self-withdrawal puncture mechanism 2 makes the puncture needle 9 automatically withdraw from the remaining needle sleeve 12; further comprising a fixing mechanism 8, the fixing mechanism 8 comprises a fixing block 81, an adhesive layer 82, a film 83 and a connecting belt 84, the fixing block 81 is fixedly connected with the connecting head 11, and the adhesive layer 82 is arranged on the surface of the fixing block 81, the film 83 is adhered to the surface of the adhesive layer 82, one end of the connecting belt 84 is connected with the film 83, and the other end of the connecting belt 84 is arranged on the surface of the self-withdrawal puncture mechanism 2, when the self-withdrawal puncture mechanism 2 is separated from the connecting head 11, the connecting belt 84 can open the film 83, so that the adhesive layer 82 is in contact with the skin of the patient.

[0051] The remaining mechanism 1 further comprises a connecting pipe 13 and a Y-shaped joint 14, the connecting pipe 13 is used to connect the Y-shaped joint 14 with the connecting head 11.

[0052] When puncturing, the medical staff can fix the arm of the child with one hand and perform puncture operation on the child with the other hand, in the embodiment, the self-withdrawal puncture mechanism 2 is arranged, when withdrawing the needle, the self-withdrawal puncture mechanism 2 can drive the puncture needle 9 to withdraw, the operation is simple and convenient, and the matching of the medical staff is reduced.

[0053] The self-withdrawal puncture mechanism 2 drives the puncture needle 9 to withdraw, and the self-withdrawal puncture mechanism 2 pulls the connecting belt 84 at the same time, the connecting belt 84 can open the film 83, and the remaining mechanism 1 can be adhered to the skin of the patient through the adhesive layer 82 on the fixing block 81, so that the remaining mechanism 1 can be preliminarily fixed, and the position of the remaining mechanism 1 is prevented from deviating, it should be noted that: after the remaining mechanism 1 is preliminarily fixed, the medical staff further fixes the remaining mechanism 1 by using a sterile dressing, through the arrangement of the fixing mechanism 8, the medical staff does not need to fix the remaining mechanism 1 all the time, both hands are released, and the medical staff is facilitated to tear the sterile dressing and paste the sterile dressing.

[0054] As Figures 1 to 4As shown, the self-retracting puncture mechanism 2 comprises an outer housing 21, a first spring 22, a connecting seat 23 and a connecting rod 24, the outer housing 21 is connected with the connecting head 11 through the buckle mechanism 4, the connecting seat 23 is located inside the outer housing 21, the connecting seat 23 is fixedly connected with the puncture needle 9, and the connecting rod 24 is fixedly connected with the connecting seat 23, one end of the connecting rod 24 is slidably penetrated through the outer housing 21, the first spring 22 is sleeved on the surface of the connecting rod 24, one end of the first spring 22 is fixedly connected with the connecting seat 23, the other end of the first spring 22 is fixedly connected with the inner surface of the outer housing 21, and one end of the connecting rod 24 is provided with the limiting mechanism 3, when the connecting rod 24 is limited by the limiting mechanism 3, the first spring 22 is in a stretched state.

[0055] The limiting mechanism 3 comprises a sliding seat 31, a limiting rod 32, a limiting hole 33 and a rubber block 34, the sliding seat 31 is installed on the surface of the outer housing 21, the limiting hole 33 is formed in one end of the connecting rod 24, the limiting rod 32 is slidably connected on the sliding seat 31, one end of the limiting rod 32 is located inside the limiting hole 33, and the end of the limiting rod 32 is fixedly connected with the rubber block 34.

[0056] When retracting the needle, the medical staff fixes the child's arm with one hand, and takes out the limiting rod 32 from the limiting hole 33 with the other hand, so that the limiting rod 32 no longer limits the connecting rod 24, the stretched first spring 22 is thus contracted, driving the connecting seat 23 and the puncture needle 9 to move, so that the puncture needle 9 is withdrawn from the indwelling mechanism 1, in this process, the needle retraction operation of the puncture needle 9 only needs to take out the limiting rod 32, which is simple and convenient for one-handed operation; in addition, by arranging the rubber block 34 at the end of the limiting rod 32, the medical staff can press the limiting rod 32 to make the rubber block 34 contact with the connecting rod 24, thereby increasing the resistance when the connecting rod 24 moves, the resistance can be controlled by adjusting the pressing force, so as to control the moving speed of the connecting rod 24, thereby maintaining a suitable needle retraction speed.

[0057] As Figures 5 to 10As shown, the buckle mechanism 4 comprises a slot 41 formed on the connecting head 11, and the outer shell 21 is fixedly connected with an insertion plate 42 matched with the slot 41, a sliding groove 45 is formed in the connecting head 11, the sliding groove 45 is perpendicular to the slot 41 and communicates with the slot 41, a clamping plate 44 is slidably connected in the sliding groove 45, a clamping groove 43 matched with the clamping plate 44 is formed on the surface of the insertion plate 42, one end of the clamping plate 44 is located in the clamping groove 43, the other end of the clamping plate 44 is connected with the sliding groove 45 through the second spring 46, a moving plate 48 is fixedly connected to the surface of the clamping plate 44, one end of the moving plate 48 is located outside the connecting head 11, and a moving groove 47 matched with the moving plate 48 is formed in the connecting head 11, and the control mechanism 5 is arranged on the surface of the connecting head 11, and the control mechanism 5 is used to control the movement of the moving plate 48, so that the clamping plate 44 can be moved out of the clamping groove 43.

[0058] The buckle mechanism 4 is provided with at least three groups, and the three groups of buckle mechanisms 4 are arranged in an annular array, and a synchronous moving mechanism 6 is arranged between the three groups of buckle mechanisms 4, so that the three groups of clamping plates 44 can move simultaneously.

[0059] The synchronous moving mechanism 6 comprises an annular groove 61 formed in the connecting head 11, and the surface of the clamping plate 44 is fixedly connected with a toothed plate 64, and the annular groove 61 is provided with a double-headed gear 63 corresponding to the toothed plate 64, and the corresponding double-headed gear 63 is meshed with the toothed plate 64, and the annular groove 61 is rotatably connected with a gear ring 62, and the gear ring 62 is located above the toothed plate 64, and the double-headed gear 63 is meshed with the gear ring 62.

[0060] The control mechanism 5 comprises a guide rod 56, one end of the guide rod 56 is slidably connected with the connecting head 11 and is provided with a plugging mechanism 7, the other end of the connecting head 11 is fixedly connected with a positioning block 51, and the positioning block 51 is arranged in the moving direction of the moving plate 48, the positioning block 51 is connected with the surface of the connecting head 11 through a third spring 55, the third spring 55 is sleeved on the guide rod 56, and the third spring 55 is in a stretched state, a plug hole 52 is formed in the positioning block 51, a rubber plug 53 is arranged in the plug hole 52, a pull rod 54 is fixedly connected to the surface of the rubber plug 53, the upper end of the pull rod 54 is connected with a top block 58 through a connecting plate 57, the top block 58 is slidably connected with the outer shell 21, and the top block 58 is located at the moving end of the connecting seat 23.

[0061] Since the puncture needle 9 is sharp, the existing puncture needle 9 is often exposed after being withdrawn, which is dangerous, in the embodiment, the outer shell 21 is arranged, the withdrawn puncture needle 9 enters the inside of the outer shell 21, so that the sharp part of the puncture needle 9 is hidden, and the safety during needle withdrawal is improved.

[0062] In addition, by setting the buckle mechanism 4, when the connecting seat 23 moves to the top of the outer shell 21, the connecting seat 23 pushes the top block 58 to move upwards, and the top block 58 drives the connecting plate 57, the pull rod 54 and the rubber plug 53 to move, and the rubber plug 53 is moved out of the insertion hole 52, and the positioning block 51 loses the limiting effect of the rubber plug 53, and the stretched third spring 55 is contracted to drive the positioning block 51 and the guide rod 56 to move. During the movement of the positioning block 51, the moving plate 48 is pushed to move, and the moving plate 48 drives a set of clamping plates 44 connected thereto to move, so that the set of clamping plates 44 moves out of the corresponding clamping slot 43. In addition, by setting the synchronous movement mechanism 6, when the set of clamping plates 44 moves, the tooth plate 64 on the set of clamping plates 44 moves to drive the corresponding double-headed gear 63 and the gear ring 62 to rotate. The rotation of the gear ring 62 drives the other two sets of double-headed gears 63 to rotate, so that the other two sets of tooth plates 64 and clamping plates 44 also move. That is, all the clamping plates 44 are moved out of the clamping slot 43, and the clamping plate 44 no longer limits the plug-in plate 42. The medical staff takes out the plug-in plate 42 on the outer shell 21 from the insertion slot 41, so that the puncture needle 9 in the outer shell 21 can be separated from the indwelling mechanism 1.

[0063] It should be noted that one end of the connecting belt 84 is connected with the outer shell 21. When the outer shell 21 is removed, the film 83 connected to the other end of the connecting belt 84 can be opened.

[0064] As shown in FIGS. 1, 2 and 3, the puncture needle 9 is connected with the connecting head 11, and the connecting head 11 is connected with the outer shell 21. Figure 1 and Figure 3 As shown in FIGS. 1, 2 and 3, the puncture needle 9 is connected with the connecting head 11, and the connecting head 11 is connected with the outer shell 21.

[0065] A groove 76 is formed in the upper surface of the push block 73, and a wedge-shaped block 75 is slidably connected in the groove 76. A pressing rod 78 is fixedly connected to the lower end of the wedge-shaped block 75. The lower end of the pressing rod 78 penetrates the bottom surface of the groove 76 and is fixedly connected with a pressing plate 77. A fourth spring 79 is sleeved on the surface of the pressing rod 78. One end of the fourth spring 79 is fixedly connected with the wedge-shaped block 75, and the other end of the fourth spring 79 is fixedly connected with the bottom surface of the groove 76.

[0066] By setting the blocking mechanism 7, when the puncture needle 9 is withdrawn from the retention mechanism 1, the blocking mechanism 7 can timely close the connecting head 11, can timely block the connecting head 11 from contacting the outside world, so as to avoid the pollution of the connecting head 11. Specifically, since the push block 73 in the blocking mechanism 7 is connected with the guide rod 56, when the guide rod 56 moves, the push block 73 moves towards the rubber sleeve 71, so that the rubber sleeve 71 is bent and stored in the storage groove 74. When the push block 73 moves to the inside of the groove body 72, the wedge block 75 is extruded by the inner wall of the groove body 72, and the wedge block 75, the pressure rod 78 and the pressure plate 77 are thus moved downward. The pressure plate 77 thus presses on the rubber sleeve 71, so that the rubber sleeve 71 is closed, thereby timely closing the connecting head 11. It should be noted that in actual use, a threaded cap can be further installed on the connecting head 11 to further close the connecting head 11. The threaded cap is one of the existing retention needle accessories, which will not be described here.

[0067] The present application encompasses any substitutions, modifications, equivalent methods and solutions made to the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the preferred embodiments of the present application, and the present application can also be fully understood without the description of these details to those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0068] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A fixing device for intravenous puncture of children, comprising a remaining mechanism and a puncture needle, characterized in that, The indwelling mechanism comprises a connecting head and an indwelling needle sleeve, one end of the indwelling needle sleeve is connected with the connecting head and communicates with the connecting head, the puncture needle is located inside the indwelling needle sleeve, and one end of the puncture needle close to the connecting head is provided with a self-withdrawal puncture mechanism, the self-withdrawal puncture mechanism enables the puncture needle to automatically withdraw from the indwelling needle sleeve; Further comprising a fixing mechanism, the fixing mechanism comprises a fixing block, an adhesive layer, a film and a connecting belt, the fixing block is fixedly connected with the connecting head, the adhesive layer is arranged on the surface of the fixing block, the surface of the adhesive layer is adhered with the film, one end of the connecting belt is connected with the film, and the other end of the connecting belt is arranged on the surface of the self-withdrawal puncture mechanism, when the self-withdrawal puncture mechanism is separated from the connecting head, the connecting belt can open the film, so that the adhesive layer is in contact with the skin of the patient; The self-withdrawal puncture mechanism comprises an outer shell, a first spring, a connecting seat and a connecting rod, the outer shell is connected with the connecting head through a buckle mechanism, the connecting seat is located inside the outer shell, the connecting seat is fixedly connected with the puncture needle, the connecting rod is fixedly connected with the connecting seat, one end of the connecting rod is slidably penetrated through the outer shell, the first spring is sleeved on the surface of the connecting rod, one end of the first spring is fixedly connected with the connecting seat, the other end of the first spring is fixedly connected with the inner surface of the outer shell, and one end of the connecting rod is provided with a limiting mechanism, when the connecting rod is limited by the limiting mechanism, the first spring is in a stretched state; The buckle mechanism comprises a slot formed on the connecting head, and a plug plate fixedly connected with the slot is arranged on the outer shell, a sliding groove is formed in the connecting head, the sliding groove is perpendicular to the slot and communicates with the slot, a clamping plate is slidably connected in the sliding groove, a clamping groove matched with the clamping plate is formed on the surface of the plug plate, one end of the clamping plate is located in the clamping groove, the other end of the clamping plate is connected with the sliding groove through a second spring, a moving plate is fixedly connected to the surface of the clamping plate, one end of the moving plate is located outside the connecting head, a moving groove matched with the moving plate is formed in the connecting head, and a control mechanism is arranged on the surface of the connecting head, the control mechanism is used for controlling the movement of the moving plate and driving the clamping plate to move out of the clamping groove; The control mechanism comprises a guide rod, one end of the guide rod is slidably connected with the connecting head and is provided with a plugging mechanism, the other end of the connecting head is fixedly connected with a positioning block, the positioning block is arranged in the moving direction of the moving plate, a third spring is connected between the surface of the connecting head and the positioning block, the third spring is sleeved on the guide rod, the third spring is in a stretched state, an insertion hole is formed in the positioning block, a rubber plug is arranged in the insertion hole, a pull rod is fixedly connected to the surface of the rubber plug, a top block is connected to the upper end of the pull rod through a connecting plate, the top block is slidably connected with the outer shell, and the top block is located at the moving end of the connecting seat.

2. The securing device for intravenous cannulation of a child according to claim 1, characterized in that, The limiting mechanism comprises a sliding seat, a limiting rod, a limiting hole and a rubber block, the sliding seat is mounted on the surface of the outer shell, the limiting hole is formed in one end of the connecting rod, the limiting rod is slidably connected to the sliding seat, one end of the limiting rod is located in the limiting hole, and the end of the limiting rod is fixedly connected with the rubber block.

3. The securing device for intravenous cannulation of a child of claim 1, wherein, The buckle mechanism is provided with at least three groups, and the three groups of buckle mechanisms are arranged in an annular array, and a synchronous moving mechanism is arranged between the three groups of buckle mechanisms, so that the three groups of buckle plates can be moved simultaneously.

4. The securing device for intravenous cannulation of a child according to claim 3, characterized in that, The synchronous moving mechanism comprises an annular groove formed in the connecting head, the buckle plates are fixedly connected with gear plates on surfaces, double-head gears corresponding to the gear plates are arranged in the annular groove, the corresponding double-head gears are in meshing connection with the gear plates, a gear ring is rotatably connected in the annular groove, the gear ring is located above the gear plates, and the double-head gears are in meshing connection with the gear ring.

5. The securing device for intravenous cannulation of a child of claim 1, wherein, The blocking mechanism comprises a rubber sleeve, a groove, a push block and a receiving groove, the rubber sleeve is sleeved on the surface of the puncture needle, one end of the rubber sleeve is fixedly connected with the connecting head, one end of the push block is fixedly connected with the guide rod, the receiving groove is formed in the lower surface of the push block and used for folding and receiving the rubber sleeve, the groove is formed in the side wall of the connecting head and located at the moving end of the push block.

6. The securing device for intravenous cannulation of a child according to claim 5, characterized in that, A recess is formed in the upper surface of the push block, a wedge-shaped block is slidably connected in the recess, a pressing rod is fixedly connected to the lower end of the wedge-shaped block, the lower end of the pressing rod penetrates through the bottom surface of the recess and is fixedly connected with a pressing plate, a fourth spring is sleeved on the surface of the pressing rod, one end of the fourth spring is fixedly connected with the wedge-shaped block, and the other end of the fourth spring is fixedly connected with the bottom surface of the recess.

7. The securement device for venipuncture of children of claim 1, wherein, The retention mechanism further comprises a connecting pipe and a Y-shaped joint, and the connecting pipe is used for connecting the Y-shaped joint and the connecting head.

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