Applicator for insertion into in vivo analyte sensor

Abstract

The utility model relates to equipment for puncturing a medical device into the skin, and discloses an applicator for inserting an in-vivo analyte sensor, which comprises a shell (10) and a boosting core (11) arranged in the shell (10), the shell (10) is provided with a trigger sleeve (12), and the boosting core (11) is compressed in the trigger sleeve (12) through a first elastic piece (13) and locks the boosting core (11) at the upper end of the trigger sleeve (12); an unlocking part (101) is arranged on the inner wall of the shell (10), when the shell (10) moves downwards, the unlocking part (101) acts on the trigger sleeve (12) and unlocks the boosting core (11), and the boosting core (11) moves downwards to the skin under the action of the first elastic piece (13). By additionally arranging the trigger sleeve, the shell does not need to be damaged, that is, various notches or holes do not need to be formed in the shell, the airtight packaging difficulty is simplified, and movement of the shell is used for unlocking the locking relation between the trigger sleeve and the boosting core.

Description

Technical Field

[0001] The utility model relates to a device for piercing a medical device into skin, in particular to an applicator for inserting an analyte sensor into a body. Background Art

[0002] The main purpose of medical devices that penetrate the skin is to monitor various body indicators at all times, such as blood glucose meters. The medical device is attached to the skin, and the soft needle on it can penetrate into the blood vessels under the action of the applicator, so as to detect the blood glucose content in the blood at all times. The working principle of the current applicator is basically to first unscrew the sealing cover of the applicator, and then install the analyte sensing head and needle on the sensor of the applicator. When in use, the opening is placed against the skin, the outer shell of the applicator is pressed, and after pushing it to the bottom, the sensor is attached to the skin, the needle implants the analyte sensing head into the skin, and the needle retreats into the applicator. For example, the medical device insert disclosed in announcement number CN102639185B and the method of inserting and using the medical device have various structural exposed gaps due to the poor integrity of the outer shell, which increases the difficulty of airtight sealing of the outer packaging. At the same time, the limitations of the single spring structure design require the overall height to be increased to obtain operating space.

[0003] There are also some applicators that press down the top button, which then triggers the internal booster spring to work, causing the booster core to push the sensor toward the skin. In the second half, the tension spring pulls the needle back into the needle assist device. For example, the implant device for implanting medical devices into the host with application number 202111016961.8 is button-triggered and requires the design of an anti-accidental touch mechanism, which increases the difficulty of operation and makes the structure more complicated. Utility Model Content

[0004] The utility model aims at the shortcomings of the prior art and provides an applicator for inserting an analyte sensor into a body.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] An applicator for inserting an in vivo analyte sensor comprises a housing and a booster core mounted within the housing;

[0007] The housing is provided with a trigger sleeve, the booster core is locked on the upper end of the trigger sleeve, and a first elastic member in a compressed state is provided between the booster core and the trigger sleeve;

[0008] An unlocking portion is provided on the shell. When the shell moves downward, the unlocking portion acts on the trigger sleeve and unlocks the boosting core. The boosting core moves downward to the skin under the action of the first elastic member.

[0009] Preferably, a limiting elastic piece is provided on the side wall of the trigger sleeve. There are at least two limiting elastic pieces evenly distributed on the trigger sleeve. The booster core is axially locked to the upper end of the trigger sleeve through the limiting elastic piece.

[0010] Preferably, a limiting portion is provided at the lower end of the booster core, and the upper end of the limiting elastic member presses against the limiting portion to limit its axial movement; when the housing moves downward, the unlocking portion pushes open the limiting elastic member.

[0011] Preferably, the unlocking part is integrally formed on the inner wall of the shell and a second notch is provided between the unlocking part and the inner wall. The unlocking part is a top block. When the unlocking part pushes open the limiting elastic part, the axial limit of the trigger sleeve and the booster core is unlocked.

[0012] Preferably, it further includes a needle removal member, the boosting core is provided with at least two claws, the needle removal member is limited on the boosting core by the claws, and a second elastic member in a compressed state is provided between the needle removal member and the boosting core.

[0013] Preferably, a limiting sleeve is provided on the top of the inner end of the trigger sleeve. When the booster core is locked on the trigger sleeve, the claws extend into the limiting sleeve and form a radial limit.

[0014] Preferably, the inner upper end of each claw is provided with a barb, the surface where the barb contacts the needle removal member is an inclined surface, and the upper end of the needle removal member is provided with a conical surface in contact with the inclined surface.

[0015] The utility model has significant technical effects due to the adoption of the above technical solutions:

[0016] This applicator features a trigger sleeve between the outer shell and the booster core. Pushing the outer shell merely unlocks the locking mechanism between the trigger sleeve and the booster core. The first elastic member then allows the booster core to move toward the skin, enabling needle implantation and sensor fixation. This design eliminates the need for indentations or holes in the outer shell, simplifying airtight packaging. The dual elastic member design reduces the applicator's overall height and size. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the explosion structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the assembly structure of the utility model.

[0019] Figure 3 It is a structural diagram of the shell.

[0020] Figure 4 It is a structural diagram of the trigger sleeve.

[0021] Figure 5 It is a structural diagram of the booster core.

[0022] The parts indicated by the numbers in the above drawings are as follows:

[0023] 10 - housing, 101 - unlocking portion, 102 - second notch, 103 - guide slope

[0024] 11 - booster core, 111 - limiter, 112 - first notch, 113 - claw, 114 - hook, 115 - inclined surface

[0025] 12-trigger sleeve, 121-limiting elastic member, 122-limiting sleeve

[0026] 13—first elastic member

[0027] 14-needle removal, 141-conical surface

[0028] 15—Second elastic member DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 The utility model is further described in detail with examples.

[0030] Example 1

[0031] The applicator for inserting an analyte sensor into the body comprises a housing 10 and a booster core 11 mounted within the housing 10. A transmitter is mounted below the booster core 11 and can be attached to the skin. During use, the transmitter retrieves the biosensor and needle from the needle removal box.

[0032] The housing 10 is provided with a trigger sleeve 12, the booster core 11 is locked on the upper end of the trigger sleeve 12, and a first elastic member 13 in a compressed state is provided between the booster core (11) and the trigger sleeve 12;

[0033] An unlocking portion 101 is provided on the inner wall of the shell 10. The unlocking portion 101 is integrally formed on the inner wall of the shell 10. The unlocking portion 101 is a top block extending inward. When the shell 10 moves downward, the unlocking portion 101 acts on the trigger sleeve 12 and unlocks the booster core 11. The booster core 11 moves downward to the skin under the action of the first elastic member 13. The first elastic member 13 is a spring.

[0034] An inwardly inclined limiting elastic part 121 is provided on the side wall of the trigger sleeve 12. In this embodiment, the limiting elastic part 121 is a spring. The limiting elastic part 121 is integrally formed on the trigger sleeve 12. The number of limiting elastic parts 121 is at least two and is evenly distributed on the trigger sleeve 12. In this embodiment, the number of trigger sleeves 12 is three. The booster core 11 is axially locked to the upper end of the trigger sleeve 12 through the limiting elastic part 121. The limiting elastic part 121 is pressed against the bottom of the booster core 11, making it unable to move downward. The unlocking part 101 is used to push open the limiting elastic part 121, thereby releasing the axial limit between the trigger sleeve 12 and the booster core 11.

[0035] The lower end of the booster core 11 is provided with a limiting portion 111, which is integrally formed at the lower end of the booster core 11 and is used to cooperate with the limiting elastic member 121 to form a limiting relationship. The limiting portion 111 is provided with a first notch 112, which allows the unlocking portion 101 to pass through, thereby facilitating its pushing open of the limiting elastic member 121. The first notch 112 provides movement space and also serves as a guide. The upper end of the limiting elastic member 121 presses against the limiting portion 111, limiting its axial movement; when the housing 10 moves downward, the unlocking portion 101 pushes open the limiting elastic member 121 through the first notch 112.

[0036] The unlocking portion 101 is integrally formed on the inner wall of the housing 10, with a second notch 102 defined between the unlocking portion 101 and the inner wall. The unlocking portion 101 serves as a push block and is provided with an outwardly inclined guiding surface 103. This outward inclination is relative to the second notch 102, i.e., the outward inclination increases the opening of the second notch 102. The unlocking portion 101 pushes the limiting elastic member 121 via the guiding surface 103, thereby unlocking the axial restraint between the trigger sleeve 12 and the booster core 11.

[0037] The applicator also includes a needle removal member 14. Three claws 113 are provided on the booster core 11. The needle removal member 14 is limited on the booster core 11 by the claws 113. A second elastic member 15 in a compressed state is provided between the needle removal member 14 and the booster core 11. The second elastic member 15 is a spring. After the booster core 11 is pushed onto the skin, the trigger sleeve 12 will release the radial limitation of the claws 113, so that the needle removal member 14 is retracted into the trigger sleeve 12 under the action of the second elastic member 15. The needle removal member 14 retracts into the trigger sleeve 12 with the hard needle, and the soft needle remains in the blood vessel.

[0038] Example 2

[0039] The features of Example 2 are basically the same as those of Example 1, except that a limiting sleeve 122 is integrally formed on the top of the inner end of the trigger sleeve 12. The limiting sleeve 122 is used to limit the radial swing of the claw 113. When the booster core 11 is locked on the trigger sleeve 12, the claw 113 extends into the limiting sleeve 122 and forms a radial limit, so that the needle removal member 14 can be locked on the booster core 11 by the claw 113.

[0040] Example 3

[0041] The features of Example 3 are basically the same as those of Example 1, except that a hook 114 is provided on the inner upper end of each claw 113, and the surface where the hook 114 contacts the needle removal member 14 is an inclined surface 115. The upper end of the needle removal member 14 is provided with a conical surface 141 that contacts the inclined surface 115. The cooperation between the inclined surface 115 and the conical surface 141 plays a guiding role, making it convenient for the second elastic member 15 to push open the needle removal member 14 more smoothly.

Claims

1. An applicator for inserting an analyte sensor into a body, comprising a housing (10) and a booster core (11) mounted in the housing (10); characterized in that: The housing (10) is provided with a trigger sleeve (12), the booster core (11) is locked on the upper end of the trigger sleeve (12), and a first elastic member (13) in a compressed state is provided between the booster core (11) and the trigger sleeve (12); The housing (10) is provided with an unlocking portion (101). When the housing (10) moves downward, the unlocking portion (101) acts on the trigger sleeve (12) and unlocks the boosting core (11). The boosting core (11) moves downward to the skin under the action of the first elastic member (13).

2. The applicator for inserting an analyte sensor into a body according to claim 1, wherein: A limiting elastic member (121) is provided on the side wall of the trigger sleeve (12). The number of the limiting elastic members (121) is at least two and they are evenly distributed on the trigger sleeve (12). The booster core (11) is axially locked to the upper end of the trigger sleeve (12) through the limiting elastic member (121).

3. The applicator for inserting an analyte sensor into a body according to claim 2, wherein: The booster core (11) is provided with a limiting portion (111), and the upper end of the limiting elastic member (121) is pressed against the limiting portion (111) to limit its axial movement; when the housing (10) moves downward, the unlocking portion (101) pushes open the limiting elastic member (121).

4. The applicator for inserting an analyte sensor into a body according to claim 2 or 3, characterized in that: The unlocking portion (101) is integrally formed on the inner wall of the housing (10) and a second notch (102) is provided between the unlocking portion (101) and the inner wall. The unlocking portion (101) is a top block. When the unlocking portion (101) pushes the limiting elastic member (121), the axial limiting of the trigger sleeve (12) and the boosting core (11) is unlocked.

5. The applicator for inserting an analyte sensor into a body according to claim 1, wherein: The invention also includes a needle removal member (14), at least two claws (113) are provided on the boosting core (11), the needle removal member (14) is limited on the boosting core (11) by the claws (113), and a second elastic member (15) in a compressed state is provided between the needle removal member (14) and the boosting core (11).

6. The applicator for inserting an analyte sensor into a body according to claim 5, wherein: A limiting sleeve (122) is provided at the top of the inner end of the trigger sleeve (12). When the booster core (11) is locked on the trigger sleeve (12), the claw (113) extends into the limiting sleeve (122) and forms a radial limit.

7. The applicator for inserting an analyte sensor into a body according to claim 5, wherein: The inner upper end of each claw (113) is provided with a hook (114), the surface of the hook (114) in contact with the needle removal member (14) is an inclined surface (115), and the upper end of the needle removal member (14) is provided with a conical surface (141) in contact with the inclined surface (115).

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