Foldable portable letrozole intramuscular injection positioning device

Abstract

The application relates to the technical field of medical positioning, in particular to a foldable and portable fulvestrant muscle injection positioning device, which comprises a waistband, an operation window is formed in the waistband, and contact blocks are arranged on the left and right sides of the operation window; a positioning sucker and a pulling sucker are arranged between the two groups of contact blocks, after the waistband is fixed to a patient, the positioning sucker and the pulling sucker can be adsorbed to the skin of the patient and matched with the contact blocks to position an injection area; a pulling mechanism is further arranged on the waistband, the pulling mechanism comprises a pulling assembly and an adjusting assembly, the adjusting assembly is connected with the positioning sucker and the pulling sucker, and the pulling assembly is connected with the pulling sucker; before injection, the pulling assembly is driven to act so that the pulling sucker gradually moves away from the positioning sucker, and at the same time, the adjusting assembly acts to increase the adsorption strength of the positioning sucker and the pulling sucker to the skin of the patient, so that the pulling sucker can be matched with the positioning sucker to unilaterally pull the skin of the injection area, thereby providing stable pulling.

Description

Technical Field

[0001] This invention relates to the field of medical positioning technology, specifically a foldable and portable fulvestrant intramuscular injection positioning device. Background Technology

[0002] Fulvestrant injection is an estrogen receptor downregulator. This product can be used for postmenopausal estrogen receptor-positive locally advanced or metastatic breast cancer that has relapsed after or during anti-estrogenic adjuvant therapy, or that has progressed during anti-estrogenic therapy. It can specifically block estrogen activity and effectively inhibit tumor progression.

[0003] Fulvestrant is an oil-based preparation, a high-viscosity, high-dose oily suspension that can be irritating. If injected improperly, the drug can seep into the subcutaneous tissue, easily causing severe pain, aseptic abscesses, and in severe cases, even tissue necrosis. Therefore, the Z-shaped traction technique is mandatory for deep intramuscular injection in clinical practice.

[0004] Before injection, medical staff place their hands on the patient's skin surface and use their hands to pull and separate the subcutaneous layer from the muscle tissue, creating a misalignment. Then, they insert the needle vertically, and after confirming there is no bleeding by aspiration, they slowly inject the medication while maintaining the skin's tension. The drug injection process is relatively long. After the medication is completely injected and after waiting for a few seconds, they release the skin and use the Z-shaped channel formed by the skin's rebound to seal the medication.

[0005] Specifically, throughout the entire process of drug injection and needle removal, to prevent the skin from slipping back into its original position prematurely, medical staff need to firmly press down on the pulled skin. However, in actual operation, because fulvestrant injection takes a long time, maintaining lateral tension for an extended period can easily lead to hand muscle fatigue, causing uneven tension or accidental loosening, resulting in premature skin rebound. This change in the injection channel reduces patient comfort during the injection process. Furthermore, when administering medication to different patients, especially obese patients, greater tension is required to achieve tissue displacement, which not only increases the workload for medical staff but also reduces patient comfort during the injection. Summary of the Invention

[0006] The purpose of this invention is to provide a foldable and portable fulvestrant intramuscular injection positioning device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A foldable and portable fulvestrant intramuscular injection positioning device includes:

[0009] A belt, wherein an operation window is provided on the belt, and contact blocks are respectively installed on the left and right sides of the operation window;

[0010] A positioning suction cup and a traction suction cup are provided between the two sets of contact blocks. After the waist belt is fixed to the patient, the positioning suction cup and the traction suction cup can be adsorbed to the patient's skin and cooperate with the contact blocks to position the injection area.

[0011] The belt is also provided with a pulling mechanism, which includes a pulling component and an adjusting component. The adjusting component is connected to the positioning suction cup and the pulling suction cup, and the pulling component is connected to the pulling suction cup.

[0012] Before injection, the pulling component is manually activated to gradually move the traction suction cup away from the positioning suction cup. At the same time, the adjusting component is activated to increase the suction force of the positioning suction cup and the traction suction cup on the patient's skin, so that the traction suction cup can cooperate with the positioning suction cup to unilaterally pull the skin in the injection area.

[0013] The foldable and portable fulvestrant intramuscular injection positioning device described above: the pulling component includes a telescopic structure and a deflection structure. The deflection structure includes a spherical seat mounted on the waist belt. Two sets of spherical seats are symmetrically arranged along the length direction of the positioning suction cup. Each set of spherical seats has a hinged ball hinged inside. A deflection cylinder is provided on each of the two sets of hinged balls, and the two sets of hinged balls are connected by a trigger.

[0014] The foldable and portable fulvestrant intramuscular injection positioning device described above: the trigger element includes a trigger block, the trigger block is fixed to the rotation axis of the two sets of hinged balls, and the trigger block is provided with a trigger surface.

[0015] The foldable and portable fulvestrant intramuscular injection positioning device as described above: the telescopic structure includes a threaded rod, which is inserted into the deflection cylinder, and the end of the threaded rod away from the deflection cylinder is hinged to the traction suction cup.

[0016] It also includes an adjusting member disposed on the deflection cylinder, the adjusting member being connected to the threaded rod and capable of driving the threaded rod to slide along the axial direction of the deflection cylinder.

[0017] The foldable and portable fulvestrant intramuscular injection positioning device described above: the adjusting component includes a threaded sleeve, which is coaxially rotatably connected to the deflection cylinder, and a threaded rod is threadedly connected to the threaded sleeve. The threaded sleeve is also connected to a trigger assembly disposed on the belt. When the deflection cylinder deflects, the trigger assembly can drive the threaded sleeve to move, so that the threaded rod slides along the axial direction of the deflection cylinder.

[0018] The foldable and portable fulvestrant intramuscular injection positioning device described above: the triggering component includes a drive gear, which is rotatably mounted on the deflection cylinder and connected to the threaded sleeve through a linkage structure. The drive gear also cooperates with a trigger mounted on the belt. When the deflection cylinder deflects, the drive gear can drive the threaded sleeve to move.

[0019] The foldable and portable fulvestrant intramuscular injection positioning device as described above: the trigger includes an arc-shaped toothed plate mounted on the belt, the arc-shaped toothed plate meshing with the drive gear.

[0020] The foldable and portable fulvestrant intramuscular injection positioning device described above: the linkage structure includes an active bevel gear and a driven bevel gear, the active bevel gear is coaxially arranged with the drive gear, the driven bevel gear is coaxially arranged with the threaded sleeve, and the active bevel gear meshes with the driven bevel gear, the radius of the active bevel gear is multiple times the radius of the driven bevel gear.

[0021] The foldable and portable fulvestrant intramuscular injection positioning device described above: the adjustment component includes a plunger cylinder mounted on the waist belt, and two sets of plunger cylinders are symmetrically arranged along the length direction of the positioning suction cup. The two sets of plunger cylinders are respectively connected to the positioning suction cup and the traction suction cup, and a pusher is provided between the plunger rods of the two sets of plunger cylinders.

[0022] The foldable and portable fulvestrant intramuscular injection positioning device as described above: the pusher includes an adaptation block, the adaptation block is connected to two sets of the plunger rods, and the adaptation block is provided with an inclined surface.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The waist belt design allows the entire device to be folded and stored, and makes it suitable for patients of different body types. During use, the physical adsorption of the positioning suction cup and the traction suction cup, as well as the positioning of the contact blocks, enables the initial positioning of the injection area. In particular, due to the design of the contact blocks, the waist belt can avoid pulling on the skin between the two sets of contact blocks during tightening, ensuring that the skin in the injection area is in a natural and relaxed state, so that medical staff can prepare for injection operations.

[0025] After initial positioning, the traction mechanism utilizes the coordination between the pulling and adjusting components to allow medical staff to freely adjust the distance between the traction suction cup and the positioning suction cup according to the patient's skin condition. During adjustment, the telescopic and deflection structures of the pulling components work together to ensure that the traction suction cup always pulls the skin horizontally, thereby reducing discomfort caused to the patient. During adjustment, the self-locking characteristic of the telescopic structure enables immediate stopping and locking, fixing the tension of the pulled skin at a certain intensity, applying a continuous and stable tension to the local tissue of the injection area, thereby tightening the pain nerve endings in the injection area, reducing the sensitivity of pain nerves to the pressure generated by drug injection, and thus reducing the pain of the patient during drug injection.

[0026] Furthermore, during the adjustment process, the adjustment component enables the traction suction cup to move outward while simultaneously increasing the negative pressure inside both the traction suction cup and the positioning suction cup. This achieves the goal of increasing the traction force and the suction force, preventing the traction suction cup and the positioning suction cup from becoming loose during the traction process. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a foldable and portable fulvestrant intramuscular injection positioning device.

[0028] Figure 2 This is a schematic diagram of the other side of the foldable and portable fulvestrant intramuscular injection positioning device.

[0029] Figure 3 This is a schematic diagram of the connection between the positioning suction cup and the waist belt in a foldable and portable fulvestrant intramuscular injection positioning device.

[0030] Figure 4 This is a schematic diagram of the connection between the traction suction cup and the waist belt in a foldable and portable fulvestrant intramuscular injection positioning device.

[0031] Figure 5 This is a schematic diagram of the contact block and the traction suction cup in a foldable and portable fulvestrant intramuscular injection positioning device.

[0032] Figure 6 This is a schematic diagram of the traction mechanism in a foldable and portable fulvestrant intramuscular injection positioning device.

[0033] Figure 7 This is a schematic diagram of the trigger and adjustment components in a foldable and portable fulvestrant intramuscular injection positioning device.

[0034] Figure 8 This is a schematic diagram of the mechanism of the trigger and adjustment components in a foldable and portable fulvestrant intramuscular injection positioning device.

[0035] Figure 9This is a schematic diagram of the structure of a foldable and portable fulvestrant intramuscular injection positioning device, showing the coordination between the traction mechanism, the waist belt, and the triggering component.

[0036] Figure 10 This is a schematic diagram of the trigger component in a foldable and portable fulvestrant intramuscular injection positioning device.

[0037] In the diagram: 1. Waist belt; 101. Operating window; 102. Lock; 2. Contact block; 301. Positioning suction cup; 302. Pulling suction cup; 4. Plunger cylinder; 401. Plunger rod; 5. Trigger block; 501. Trigger surface; 6. Adaptation block; 601. Inclined surface; 7. Spherical seat; 701. Slide groove; 8. Hinge ball; 801. Rotating shaft; 9. Deflection cylinder; 10. Threaded sleeve; 1101. Driving bevel gear; 1102. Driven bevel gear; 12. Drive gear; 13. Threaded rod; 14. Arc-shaped toothed plate. Detailed Implementation

[0038] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0039] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0040] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0041] Please see Figures 1-10 In this embodiment of the invention, a foldable and portable fulvestrant intramuscular injection positioning device includes:

[0042] A belt 1, on which an operation window 101 is provided, and contact blocks 2 are respectively installed on the left and right sides of the operation window 101;

[0043] Preferably, please refer to Figure 1 , Figure 2 The waist belt 1 is provided with a buckle 102, which can fix the length of the waist belt 1 so that the waist belt 1 can be stably attached to the patient's body surface. Due to the buckle 102, the waist belt 1 can be easily connected to patients of different body types, thereby improving the applicability of the device.

[0044] In particular, the aforementioned waist belt 1 is made of a skin-friendly and soft material, which allows the waist belt 1 to be easily folded for storage by medical staff. The side of the contact block 2 that comes into contact with the skin is provided with a rubber pad, which can reduce the patient's discomfort and provide the patient with a comfortable experience.

[0045] When the belt 1 is fastened to the patient's torso, the contact block 2 will come into contact with the patient's skin. At this time, when the medical staff adjusts the length of the belt 1 according to the patient's body shape, the belt 1 can avoid pulling on the skin between the two sets of contact blocks 2, so that the skin placed in the operation window 101 is in a normal relaxed state, so that the medical staff can treat the skin in this area later.

[0046] Further, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 A positioning suction cup 301 and a traction suction cup 302 are provided between the two sets of contact blocks 2. After the waist belt 1 is fixed to the patient, the positioning suction cup 301 and the traction suction cup 302 can be adsorbed to the patient's skin and cooperate with the contact block 2 to position the injection area.

[0047] In detail, when the waist belt 1 is fastened, the positioning suction cup 301 and the traction suction cup 302 contact the patient's skin before the contact block 2. During the process of locking the waist belt 1, the positioning suction cup 301 and the traction suction cup 302 deform upon contact with the skin, squeezing outward air and causing the positioning suction cup 301 and the traction suction cup 302 to adhere to the patient's body surface. At this time, the positioning suction cup 301, the traction suction cup 302, and the two sets of contact blocks 2 work together to initially locate the drug injection area.

[0048] Furthermore, please refer to Figures 1-10 The belt 1 is also provided with a pulling mechanism, which includes a pulling component and an adjusting component. The adjusting component is connected to the positioning suction cup 301 and the pulling suction cup 302, and the pulling component is connected to the pulling suction cup 302.

[0049] The pulling assembly includes a telescopic structure and a deflection structure. The deflection structure includes a spherical seat 7 installed on the waist belt 1. Two sets of spherical seats 7 are symmetrically arranged along the length direction of the positioning suction cup 301. Each set of spherical seats 7 has a hinged ball 8 hinged inside. The two sets of hinged balls 8 are respectively provided with deflection cylinders 9, and the two sets of hinged balls 8 are connected by a trigger.

[0050] In particular, please see Figure 7The spherical seat 7 is provided with a sliding groove 701, which is arranged along the length direction of the contact block 2. Under the restriction of the sliding groove 701, the hinge ball 8 can only drive the deflection cylinder 9 to deflect in the length direction of the contact block 2.

[0051] Specifically, the triggering element includes a trigger block 5, which is fixed to the rotation shaft 801 of the two sets of hinged balls 8, and the trigger block 5 is provided with a trigger surface 501;

[0052] The telescopic structure includes a threaded rod 13, which is inserted into the deflection cylinder 9, and the end of the threaded rod 13 away from the deflection cylinder 9 is hinged to the traction suction cup 302.

[0053] It also includes an adjusting member disposed on the deflection cylinder 9, the adjusting member being connected to the threaded rod 13 and capable of driving the threaded rod 13 to slide along the axial direction of the deflection cylinder 9;

[0054] The adjusting component includes a threaded sleeve 10, which is coaxially rotatably connected to the deflection cylinder 9. The threaded rod 13 is threadedly connected to the threaded sleeve 10, and the threaded sleeve 10 is connected to a trigger assembly disposed on the belt 1. When the deflection cylinder 9 deflects, the trigger assembly can drive the threaded sleeve 10 to move, so that the threaded rod 13 slides along the axial direction of the deflection cylinder 9.

[0055] For details, please refer to Figures 1-6 In the initial state, the threaded rod 13 is retracted into the deflection cylinder 9 and is perpendicular to the waist belt 1, and the traction suction cup 302 is parallel to the waist belt 1. At this time, the trigger block 5 is parallel to the waist belt 1, and the rotation axis 801 of the hinge ball 8 is placed at the end of the stroke of the slide groove 701 away from the contact block 2. Due to the thread self-locking function between the threaded sleeve 10 and the threaded rod 13, the distance between the traction suction cup 302 and the waist belt 1 cannot be easily changed, so that medical staff can complete the initial positioning of the injection area when fastening the waist belt 1.

[0056] After initial positioning, medical staff adjusted the position of the traction suction cup 302 according to the patient's skin condition:

[0057] The pulling component is manually driven to move the traction suction cup 302 away from the positioning suction cup 301. At the same time, the adjustment component is activated to increase the suction force of the positioning suction cup 301 and the traction suction cup 302 on the patient's skin, so that the traction suction cup 302 can cooperate with the positioning suction cup 301 to pull the skin of the injection area on one side.

[0058] Specifically, before injection, in order to improve the patient's comfort during the injection, medical staff adjust the degree of traction on the patient's skin according to the patient's body shape, including the traction distance and traction force. In this invention, medical staff can change the degree of traction on the skin in the injection area by pushing the trigger block 5 to slide toward the positioning suction cup 301.

[0059] When the trigger block 5 drives the deflection cylinder 9 and the threaded rod 13 to deflect away from the positioning suction cup 301, the rotation shaft 801 of the hinge ball 8 slides in the groove 701. Immediately afterwards, the trigger component actuates, driving the threaded sleeve 10 to rotate. Then, the rotating threaded sleeve 10 forces the threaded rod 13 to extend outward along the axial direction of the deflection cylinder 9. At this time, the traction suction cup 302 adhering to the patient's skin gradually moves away from the positioning suction cup 301, thereby pulling the skin in the injection area so that a Z-shaped channel is formed after the needle enters the muscle layer. After the injection is completed, the skin is released, and the channel is closed by misalignment, making it difficult for the drug to leak out.

[0060] In particular, during actual use, because patients have different body shapes and skin conditions, medical staff need to pull the patient's skin according to the patient's actual situation before administering the drug injection.

[0061] In this invention, medical personnel can adjust the deflection angle of the deflection cylinder 9 according to the patient's skin condition in order to adjust the stretching force on the patient's skin.

[0062] During the adjustment process, due to the self-locking characteristic between the threaded sleeve 10 and the threaded rod 13, the angle adjustment of the deflection cylinder 9 can be stopped and locked immediately, thereby stabilizing the skin after stretching, which makes it easier for medical staff to inject drugs.

[0063] Compared to the traditional method of pulling with the hand, the above-mentioned traction method is more stable and can apply a continuous and stable tension to the local tissue of the injection area, thereby tightening the pain nerve endings in the injection area, reducing the sensitivity of the pain nerves to the pressure generated by drug injection, and thus reducing the pain of patients when injecting drugs.

[0064] Preferably, please refer to Figure 8 , Figure 9 , Figure 10 The triggering component includes a drive gear 12, which is rotatably mounted on the deflection cylinder 9 and connected to the threaded sleeve 10 through a linkage structure. The drive gear 12 cooperates with a trigger mounted on the belt 1. When the deflection cylinder 9 deflects, the drive gear 12 can drive the threaded sleeve 10 to move.

[0065] The trigger includes an arc-shaped toothed plate 14 mounted on the belt 1, the arc-shaped toothed plate 14 meshing with the drive gear 12, and in particular, the axis of the arc-shaped toothed plate 14 is coaxial with the rotation axis of the hinge ball 8.

[0066] The linkage structure includes a driving bevel gear 1101 and a driven bevel gear 1102. The driving bevel gear 1101 is coaxially arranged with the driving gear 12, and the driven bevel gear 1102 is coaxially arranged with the threaded sleeve 10. The driving bevel gear 1101 and the driven bevel gear 1102 mesh. The radius of the driving bevel gear 1101 is several times the radius of the driven bevel gear 1102, so that when the driving gear 12 rotates, the threaded sleeve 10 can just drive the threaded rod 13 to extend or retract by a certain length.

[0067] In addition to the above, it should be noted that during the process of manually driving the deflection cylinder 9 to deflect, the drive gear 12 rotates with the deflection cylinder 9. At the same time, under the drive of the arc-shaped toothed plate 14, the drive gear 12 can drive the active bevel gear 1101 to rotate.

[0068] Next, the active bevel gear 1101 and the driven bevel gear 1102 engage in a transmission state, driving the threaded sleeve 10 to rotate, thereby pushing the threaded rod 13 to extend outward. This compensates for the height difference generated when the deflection cylinder 9 drives the traction suction cup 302 to rotate, so that the traction suction cup 302 will not pull the patient's skin upward, thereby improving the user experience of the device.

[0069] For details, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 The adjustment component includes a plunger cylinder 4 mounted on the waist belt 1. Two sets of plunger cylinders 4 are symmetrically arranged along the length direction of the positioning suction cup 301. The two sets of plunger cylinders 4 are respectively connected to the positioning suction cup 301 and the pulling suction cup 302, and a pusher is provided between the plunger rods 401 of the two sets of plunger cylinders 4.

[0070] The pusher includes an adaptation block 6, which is connected to two sets of plunger rods 401, and the adaptation block 6 is provided with an inclined surface 601.

[0071] Specifically, in the initial state, the inclined surface 601 of the aforementioned adaptation block 6 is in contact with the trigger surface 501 of the trigger block 5, at which time the plunger rod 401 is close to the ball seat 7;

[0072] In summary, when medical staff manually rotate the deflector cylinder 9, the trigger surface 501 and the inclined surface 601 come into contact and squeeze, which pushes the adaptor block 6 to move the plunger rod 401 away from the spherical seat 7. This allows the plunger cylinder 4 to pump air and pressurize the traction suction cup 302 and the positioning suction cup 301, thereby increasing the adhesion between the traction suction cup 302 and the positioning suction cup 301 and the patient's skin. This prevents the traction suction cup 302 or the positioning suction cup 301 from detaching from the patient's skin due to the increased traction force during the traction process. In particular, there is a certain damping between the spherical seat 7 and the hinge ball 8. This damping prevents the deflector cylinder 9 from rotating easily. At the same time, it can counteract the force that the plunger rod 401 wants to retract towards the spherical seat 7 when it is pumping, so that the traction suction cup 302 can unidirectionally pull the skin in the injection area.

[0073] After the injection is completed, the hinge ball 8 is rotated away from the positioning suction cup 301. During this process, the drive gear 12 cooperates with the arc-shaped toothed plate 14 to drive the threaded sleeve 10 to reverse, so that the threaded rod 13 retracts. At the same time, since the positioning suction cup 301 and the traction suction cup 302 remain in close contact with the patient's skin during the above-mentioned suction process, when the hinge ball 8 is reversed, the trigger block 5 abuts against the adaptation block 6 and the plunger rod 401 will automatically retract, so that the adaptation block 6 gradually slides towards the ball seat 7 until the deflection cylinder 9 returns to the initial position, and the adaptation block 6 also returns to the initial position. At this time, the suction force of the positioning suction cup 301 and the traction suction cup 302 on the patient's skin decreases to the initial state, so that medical staff can separate the waist belt 1 from the patient.

[0074] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0075] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A foldable and portable fulvestrant intramuscular injection positioning device, comprising: A belt (1) having an operation window (101) on its surface, and contact blocks (2) installed on the left and right sides of the operation window (101); characterized in that: A positioning suction cup (301) and a traction suction cup (302) are provided between the two sets of contact blocks (2). After the waist belt (1) is fixed to the patient, the positioning suction cup (301) and the traction suction cup (302) can adhere to the patient's skin and cooperate with the contact block (2) to locate the injection area. The belt (1) is also provided with a pulling mechanism, which includes a pulling component and an adjusting component. The adjusting component is connected to the positioning suction cup (301) and the pulling suction cup (302), and the pulling component is connected to the pulling suction cup (302). Before injection, the pulling component is manually activated to gradually move the traction suction cup (302) away from the positioning suction cup (301). At the same time, the adjusting component is activated to increase the suction force of the positioning suction cup (301) and the traction suction cup (302) on the patient's skin, so that the traction suction cup (302) can cooperate with the positioning suction cup (301) to unilaterally pull the skin in the injection area.

2. The foldable and portable fulvestrant intramuscular injection positioning device according to claim 1, characterized in that, The pulling assembly includes a telescopic structure and a deflection structure. The deflection structure includes a spherical seat (7) installed on the waist belt (1). Two sets of spherical seats (7) are symmetrically arranged along the length direction of the positioning suction cup (301). Each set of spherical seats (7) has a hinged ball (8) hinged inside. The two sets of hinged balls (8) are respectively provided with deflection cylinders (9), and the two sets of hinged balls (8) are connected by a trigger.

3. A foldable and portable fulvestrant intramuscular injection positioning device according to claim 2, characterized in that, The triggering element includes a trigger block (5), which is fixed to the rotation axis (801) of the two sets of hinged balls (8), and the trigger block (5) is provided with a trigger surface (501).

4. A foldable and portable fulvestrant intramuscular injection positioning device according to claim 2, characterized in that, The telescopic structure includes a threaded rod (13), which is inserted into the deflection cylinder (9), and the end of the threaded rod (13) away from the deflection cylinder (9) is hinged to the traction suction cup (302); It also includes an adjusting member disposed on the deflection cylinder (9), the adjusting member being connected to the threaded rod (13) and capable of driving the threaded rod (13) to slide along the axial direction of the deflection cylinder (9).

5. A foldable and portable fulvestrant intramuscular injection positioning device according to claim 4, characterized in that, The adjusting component includes a threaded sleeve (10), which is coaxially rotatably connected to the deflection cylinder (9). The threaded rod (13) is threadedly connected to the threaded sleeve (10), and the threaded sleeve (10) is connected to a trigger assembly disposed on the belt (1). When the deflection cylinder (9) deflects, the trigger assembly can drive the threaded sleeve (10) to move so that the threaded rod (13) slides along the axial direction of the deflection cylinder (9).

6. A foldable and portable fulvestrant intramuscular injection positioning device according to claim 5, characterized in that, The triggering component includes a drive gear (12), which is rotatably mounted on the deflection cylinder (9) and connected to the threaded sleeve (10) through a linkage structure. The drive gear (12) cooperates with a trigger mounted on the belt (1). When the deflection cylinder (9) deflects, the drive gear (12) can drive the threaded sleeve (10) to move.

7. A foldable and portable fulvestrant intramuscular injection positioning device according to claim 6, characterized in that, The trigger includes an arc-shaped toothed plate (14) mounted on the belt (1), which meshes with the drive gear (12).

8. A foldable and portable fulvestrant intramuscular injection positioning device according to claim 6, characterized in that, The linkage structure includes a driving bevel gear (1101) and a driven bevel gear (1102). The driving bevel gear (1101) is coaxially arranged with the driving gear (12), and the driven bevel gear (1102) is coaxially arranged with the threaded sleeve (10). The driving bevel gear (1101) meshes with the driven bevel gear (1102). The radius of the driving bevel gear (1101) is a multiple of the radius of the driven bevel gear (1102).

9. A foldable and portable fulvestrant intramuscular injection positioning device according to claim 2, characterized in that, The adjustment assembly includes a plunger cylinder (4) mounted on the waist belt (1). Two sets of plunger cylinders (4) are symmetrically arranged along the length direction of the positioning suction cup (301). The two sets of plunger cylinders (4) are respectively connected to the positioning suction cup (301) and the pulling suction cup (302), and a pusher is provided between the plunger rods (401) of the two sets of plunger cylinders (4).

10. A foldable and portable fulvestrant intramuscular injection positioning device according to claim 9, characterized in that, The pusher includes an adaptation block (6), which is connected to two sets of plunger rods (401), and the adaptation block (6) is provided with an inclined surface (601).

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