Anti-leakage device for venous transfusion

Abstract

The invention discloses an anti-leakage device for venous transfusion, and relates to the technical field of transfusion equipment, the anti-leakage device comprises a shell part, a protection mechanism is assembled in the shell part, a mounting bottom plate is mounted at the bottom end of the shell part, one side of the shell part is connected with a guide wrister, a placement pad is arranged at the bottom end of the guide wrister, and a heightening base is assembled at the bottom end of the placement pad; a driving assembly is mounted on the outer wall of the protection mechanism; the driving assembly is used for driving the protection mechanism to do fan-shaped reciprocating motion; the shell part is provided with a containing through hole matched with the protection mechanism in the length direction of the shell part. The arm of a patient is limited through the protection mechanism, so that the phenomenon of liquid leakage caused by unconscious movement of the patient is prevented, meanwhile, through operation of the protection mechanism, the arm of the patient is massaged in the circumferential direction, the discomfort of numbness caused by the fact that the arm of the patient keeps one action for a long time is reduced, and the patient feels more comfortable. And the frequency of moving arms of the patient is reduced, so that the probability of liquid leakage is reduced again.

Description

Technical Field

[0001] The invention relates to the technical field of infusion equipment, in particular to an anti-leakage device for intravenous infusion. Background Art

[0002] In the process of modern medical treatment, intravenous infusion is a very common medical method. Although intravenous infusion seems simple, it has many skills. After the medical staff inserts the infusion needle on the infusion tube into the patient's vein, they need to use medical tape to stick the infusion needle to the back of the patient's hand to prevent leakage.

[0003] However, the above technical solution has certain shortcomings. When infusing children or patients who are not conscious, the patients cannot actively cooperate with medical staff, and may even move around due to physical discomfort, which may cause the infusion needle to puncture the blood vessels and cause the drug solution to enter the blood vessels. Therefore, an intravenous infusion anti-leakage device is proposed. Summary of the invention

[0004] Based on this, the object of the present invention is to provide an intravenous infusion anti-leakage device to solve the technical problems raised in the above background.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an intravenous infusion anti-leakage device, comprising a shell member, a protective mechanism is installed inside the shell member, a mounting base is installed at the bottom end of the shell member, a guide wrist guard is connected to one side of the shell member, a placement pad is provided at the bottom end of the guide wrist guard, a padding base is installed at the bottom end of the placement pad, and a driving assembly is installed on the outer wall of the protective mechanism;

[0006] The driving assembly is used to drive the protection mechanism to perform fan-shaped reciprocating motion;

[0007] The shell part is provided with a placement through hole matching the protection mechanism along its length direction.

[0008] As a preferred technical solution of the present invention, the driving assembly includes a gear plate connected to the protective mechanism through a latching tooth, a fifth rotating shaft is installed at the center position of the gear plate, an outer wall of the fifth rotating shaft is located at one end of the gear plate and a mounting bearing seat is installed, the bottom end of the mounting bearing seat is fixedly installed on the top of the mounting base plate, one end of the fifth rotating shaft is equipped with a driving motor, and the bottom end of the driving motor is fixedly installed on the top of the mounting base plate through a motor seat.

[0009] As a preferred technical solution of the present invention, the protective mechanism includes a supporting assembly connected to the gear plate through latching teeth, both sides of the supporting assembly are equipped with limiting assemblies, a massage assembly is installed at one end of the limiting assembly away from the supporting assembly, a restraining assembly is provided on the outer wall of the massage assembly, and a skin-friendly assembly is provided on the inner wall of the massage assembly.

[0010] As a preferred technical solution of the present invention, the support assembly includes a connecting disk, the outer wall of the connecting disk is equipped with a sector gear bar, the sector gear bar is connected to the gear disk by meshing with a latch, both ends of the connecting disk are rotatably connected with a rotating disk, the end of the rotating disk away from the connecting disk is equipped with a connecting block, the number of the connecting blocks is three groups, and the three groups of connecting blocks are arranged in an array equidistantly along the circumferential direction of the rotating disk, a limiting disk is installed at the end of the connecting block away from the rotating disk, a swing plate is provided on the outer wall of the rotating disk, and locking members penetrating through both ends of the swing plate are provided on the outer wall of the swing plate, and the locking members are used to limit the two groups of swing plates, one end of the connecting disk is provided with a sector slide extending through the other end, and the sector slide is adapted to the outer wall size of the locking member, and both ends of the connecting disk are located on one side of the rotating disk and equipped with a limiting bracket, the limiting bracket rotates with the inner wall of the housing member through the slide, and the limiting bracket cooperates with the housing member to support the protective mechanism, the number of the limiting bracket is two groups, and both ends of the limiting bracket are provided with a stop disk.

[0011] As a preferred technical solution of the present invention, the limit assembly includes a first rotating shaft rotatably connected to a connecting plate, an outer wall of the first rotating shaft is equipped with a guide arm, an outer wall of the guide arm is sleeved with a limit sleeve, a second rotating shaft is arranged at the top and bottom ends of the limit sleeve, a connecting seat is installed at one end of the guide arm away from the first rotating shaft, the connecting seat is rotatably connected to the guide arm, the limit plate and the rotating plate are provided with a limit hole matching the second rotating shaft, and the connecting seat is fixedly connected to the massage assembly.

[0012] As a preferred technical solution of the present invention, the massage component includes an arc-shaped plate connected to the connecting seat, and the arc-shaped plate as a whole is in the shape of an arc-shaped long plate. The number of the arc-shaped plates is three groups, and the three groups of arc-shaped plates are evenly spaced in an array along the circumferential direction to form a ring. A third rotating shaft is arranged inside the arc-shaped plate and passes through both ends of the arc-shaped plate. Both ends of the third rotating shaft are equipped with connecting arms, and a fourth rotating shaft is installed on the side of the connecting arm away from the third rotating shaft, and a massage roller is sleeved on the outer wall of the fourth rotating shaft.

[0013] As a preferred technical solution of the present invention, the restraint component includes a connecting sleeve that fits the outer wall of the arc-shaped plate, the interior of the connecting sleeve is connected to a limiting spring coil, and the outer walls at both ends of the massage component are sleeved with two sets of restraint components.

[0014] As a preferred technical solution of the present invention, the skin-friendly component includes a high-strength rubber strip that fits the inner wall of the massage roller, the high-strength rubber strip is provided with through holes extending to both ends thereof, and a high-strength connecting strip is installed on one side of the high-strength rubber strip.

[0015] As a preferred technical solution of the present invention, the shell member includes a flip cover and a connecting shell, the flip cover and the connecting shell are rotatably connected via a hinge shaft, the connecting shell is detachably connected to the mounting base via a clamping mechanism, a first heating device is installed on the inner wall of the connecting shell, the placement pad is detachably connected to the raised base, the placement pad is hollow inside, a second heating device is placed inside the placement pad, and the first heating device and the second heating device are connected in series via a control switch.

[0016] In summary, the present invention mainly has the following beneficial effects:

[0017] The present invention limits the patient's arm through a protective mechanism to prevent the patient from unconsciously moving around and causing leakage. At the same time, through the operation of the protective mechanism, the patient's arm is massaged in a circumferential direction to reduce the numbness and discomfort of the patient's arm caused by maintaining the same action for a long time, reduce the frequency of the patient's arm movements, and further reduce the probability of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the position structure of the protection mechanism and the driving assembly of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the protection mechanism of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the support assembly of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the limit assembly and the massage assembly of the present invention;

[0024] Figure 7 It is a schematic structural diagram of the skin-friendly component of the present invention.

[0025] In the figure: 100, housing member; 200, protection mechanism; 300, mounting base plate; 400, guide wrist guard; 500, placement pad; 600, padding base; 700, drive assembly;

[0026] 210, support component; 220, limit component; 230, massage component; 240, restraint component; 250, skin-friendly component;

[0027] 211, connecting plate; 212, rotating plate; 213, connecting block; 214, limiting plate; 215, swing plate; 216, locking member; 217, fan-shaped slide; 218, limiting bracket; 219, fan-shaped gear bar;

[0028] 221, first rotating shaft; 222, guide arm; 223, limit sleeve; 224, second rotating shaft; 225, connecting seat;

[0029] 231, curved plate; 232, third rotating shaft; 233, connecting arm; 234, fourth rotating shaft; 235, massage roller;

[0030] 241, connecting sleeve; 242, limiting spring ring;

[0031] 251. high-strength rubber strip; 252. through hole; 253. high-strength connecting strip;

[0032] 710, driving motor; 720, fifth rotating shaft; 730, mounting bearing seat; 740, gear plate. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] The following describes an embodiment of the present invention based on its overall structure.

[0035] An intravenous infusion anti-leakage device, such as Figures 1 to 7 As shown, it includes a shell 100, a protective mechanism 200 is installed inside the shell 100, a mounting base 300 is installed at the bottom end of the shell 100, a guide wrist guard 400 is connected to one side of the shell 100, a placement pad 500 is provided at the bottom end of the guide wrist guard 400, a pad 600 is installed at the bottom end of the placement pad 500, and a driving assembly 700 is installed on the outer wall of the protective mechanism 200;

[0036] The housing 100 includes a flip cover and a connecting housing, the flip cover and the connecting housing are rotatably connected via a hinge shaft, the connecting housing and the mounting base 300 are detachably connected via a clamping mechanism, a first heating device is installed on the inner wall of the connecting housing, a placement pad 500 is detachably connected to a raised base 600, the placement pad 500 is hollow inside, a second heating device is placed inside the placement pad 500, and the first heating device and the second heating device are connected in series via a control switch;

[0037] The driving assembly 700 is used to drive the protection mechanism 200 to perform fan-shaped reciprocating motion;

[0038] The housing 100 is provided with a placement through hole matching the protection mechanism 200 along its length direction;

[0039] When in use, the medical staff opens the flap, opens the protection mechanism 200 to the maximum state, then passes the patient's hand through the protection mechanism 200, and then controls the protection mechanism 200 to fit the patient's arm, closes the flap, and then the device can be assembled on the patient's arm. Since the mounting base 300 is usually fixedly assembled on a bed or an infusion chair, the above operation can limit the position of the patient's arm to prevent the patient from unconsciously moving around and causing leakage.

[0040] At the same time, the first heating device and the second heating device heat the patient's arm and palm respectively, thereby alleviating the temperature drop of the patient's arm and palm caused by the low temperature of the delivered liquid during infusion, increasing the patient's comfort during use. When the patient feels the warmth from the arm and palm during infusion, the frequency of the patient's arm movement can be reduced, thereby further reducing the probability of leakage.

[0041] During the infusion process, by starting the power switch of the driving component 700, the protective mechanism 200 can be controlled to perform fan-shaped reciprocating operation as a whole, so that the patient's arm can be massaged in a circular direction through the operation of the protective mechanism 200, so as to reduce the numbness and discomfort of the patient's arm caused by maintaining the same action for a long time, reduce the frequency of the patient's arm movement, and further reduce the probability of leakage.

[0042] Please refer to Figures 1 to 3 As shown, the driving assembly 700 includes a gear plate 740 connected to the protective mechanism 200 through a latching tooth, a fifth rotating shaft 720 is mounted at the center position of the gear plate 740, a mounting bearing seat 730 is mounted on the outer wall of the fifth rotating shaft 720 at one end of the gear plate 740, the bottom end of the mounting bearing seat 730 is fixedly mounted on the top of the mounting base plate 300, a driving motor 710 is mounted on one end of the fifth rotating shaft 720, and the bottom end of the driving motor 710 is fixedly mounted on the top of the mounting base plate 300 through a motor seat. When the staff starts the driving motor 710, the driving motor 710 drives the fifth rotating shaft 720 to perform circular reciprocating motion, the circular reciprocating motion of the fifth rotating shaft 720 drives the gear plate 740 to rotate, and the rotation of the gear plate 740 drives the protective mechanism 200 to operate.

[0043] Please refer to Figure 3 and Figure 4As shown, the protection mechanism 200 includes a support assembly 210 connected to the gear plate 740 through a latching tooth, both sides of the support assembly 210 are equipped with a limit assembly 220, and a massage assembly 230 is installed at one end of the limit assembly 220 away from the support assembly 210, and a restraining assembly 240 is arranged on the outer wall of the massage assembly 230, and a skin-friendly assembly 250 is arranged on the inner wall of the massage assembly 230;

[0044] The rotation of the gear plate 740 drives the support component 210 to rotate, and the rotation of the support component 210 drives the limit component 220 to rotate, thereby driving the massage component 230 to rotate. Since the skin-friendly component 250 fits the patient's arm and has a large friction, the massage component 230 rotates to hang the skin-friendly component 250, so that the massage component 230 massages the patient's arm through the skin-friendly component 250, and the numbness of the patient's arm is reduced by massaging the patient's arm.

[0045] Please refer to Figures 3 to 5 As shown, the support assembly 210 includes a connecting disk 211, the outer wall of the connecting disk 211 is equipped with a sector gear bar 219, the sector gear bar 219 is connected to the gear disk 740 through a tooth meshing connection, both ends of the connecting disk 211 are rotatably connected to the rotating disk 212, the end of the rotating disk 212 away from the connecting disk 211 is equipped with a connecting block 213, the number of the connecting blocks 213 is three groups, the three groups of connecting blocks 213 are equidistantly distributed in an array along the circumferential direction of the rotating disk 212, a limiting disk 214 is installed at the end of the connecting block 213 away from the rotating disk 212, the outer wall of the rotating disk 212 is provided with a swing plate 215, the outer side of the swing plate 215 The wall is equipped with locking pieces 216 penetrating to both ends thereof, and the locking pieces 216 are used to limit the two sets of swing plates 215. One end of the connecting disk 211 is provided with a fan-shaped slide groove 217 penetrating to the other end thereof, and the fan-shaped slide groove 217 is adapted to the outer wall size of the locking piece 216. The two ends of the connecting disk 211 are located on one side of the rotating disk 212 and are equipped with limiting brackets 218. The limiting brackets 218 rotate with the inner wall of the shell 100 through the slide groove. The limiting brackets 218 cooperate with the shell 100 to support the protective mechanism 200. There are two sets of limiting brackets 218, and both ends of the limiting brackets 218 are provided with stop disks.

[0046] When the gear plate 740 rotates, the sector gear bar 219 performs circular reciprocating motion, the sector gear bar 219 performs circular reciprocating motion, and the connecting plate 211 performs circular reciprocating motion, thereby the limiting assembly 220 performs circular reciprocating motion, and the limiting assembly 220 performs circular reciprocating motion, and the massage assembly 230 performs circular reciprocating motion;

[0047] The limiting assembly 220 includes a first rotating shaft 221 rotatably connected to the connecting plate 211, a guide arm 222 is mounted on the outer wall of the first rotating shaft 221, a limiting sleeve 223 is sleeved on the outer wall of the guide arm 222, a second rotating shaft 224 is arranged at the top and bottom of the limiting sleeve 223, a connecting seat 225 is mounted on one end of the guide arm 222 away from the first rotating shaft 221, the connecting seat 225 is rotatably connected to the guide arm 222, the limiting plate 214 and the rotating plate 212 are provided with a limiting hole matching the second rotating shaft 224, and the connecting seat 225 is fixedly connected to the massage assembly 230;

[0048] When the medical staff needs to adjust the protection mechanism 200 according to the patient's arm, the medical staff first opens the flip cover, then rotates the locking member 216 (which can be a bolt) in the reverse direction to release the limit on the swing plate 215, and then rotates the swing plate 215. The swing plate 215 moves to drive the rotating disk 212 to rotate, and the rotating disk 212 rotates to drive the limiting sleeve 223 to move, thereby driving the guide arm 222 to rotate around the first rotating shaft 221, and the guide arm 222 rotates to drive the connecting seat 225 to move;

[0049] The restraint assembly 240 includes a connecting sleeve 241 fitted to the outer wall of the arc-shaped plate 231, the interior of the connecting sleeve 241 is connected to a limit spring ring 242, and the outer walls of both ends of the massage assembly 230 are sleeved with two sets of restraint assemblies 240; the skin-friendly assembly 250 includes a high-strength rubber strip 251 fitted to the inner wall of the massage roller 235, the interior of the high-strength rubber strip 251 is provided with through holes 252 penetrating to both ends thereof, and one side of the high-strength rubber strip 251 is equipped with a high-strength connecting strip 253;

[0050] The movement of the connecting seat 225 drives the massage component 230 to move. Since the connecting seat 225 is rotatably connected to the guide arm 222, and the restraining component 240 is assembled on the outer wall of the massage component 230, the restraining component 240 has an inward squeezing force on the massage component 230. At the same time, the skin-friendly component 250 is composed of high-strength rubber, so that the skin-friendly component 250 has an outward expansion force on the massage component 230. When the massage component 230 moves, the diameter of the skin-friendly component 250 changes accordingly, thereby effectively adapting to the arm size of most patients.

[0051] Please refer to Figure 6 As shown, the massage component 230 includes an arc plate 231 connected to the connecting seat 225. The arc plate 231 is in the shape of an arc long plate as a whole. There are three groups of arc plates 231, and the three groups of arc plates 231 are arranged in an array equidistantly along the circumferential direction to form a ring. The arc plate 231 is provided with a third rotating shaft 232 penetrating to both ends thereof. Both ends of the third rotating shaft 232 are equipped with connecting arms 233. A fourth rotating shaft 234 is installed on a side of the connecting arm 233 away from the third rotating shaft 232, and a massage roller 235 is sleeved on the outer wall of the fourth rotating shaft 234.

[0052] When the limiting component 220 drives the massage component 230 to move, the arc plate 231 rotates to drive the third rotating shaft 232 to move, thereby driving the connecting arm 233 to move. The movement of the connecting arm 233 drives the fourth rotating shaft 234 to move, thereby driving the massage roller 235 to move. The massage roller 235 squeezes the skin-friendly component 250, thereby achieving massage of the patient's arm.

[0053] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art.

[0054] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An intravenous infusion anti-leakage device, comprising a housing (100), characterized in that: The housing (100) is equipped with a protective mechanism (200) inside, the bottom end of the housing (100) is equipped with a mounting base (300), one side of the housing (100) is connected with a guide wrist guard (400), the bottom end of the guide wrist guard (400) is provided with a placement pad (500), the bottom end of the placement pad (500) is equipped with a raised base (600), and the outer wall of the protective mechanism (200) is equipped with a driving assembly (700); The driving assembly (700) is used to drive the protection mechanism (200) to perform fan-shaped reciprocating motion; The housing member (100) is provided with a placement through hole along its length direction that matches the protection mechanism (200).

2. The intravenous infusion anti-leakage device according to claim 1, characterized in that: The driving assembly (700) includes a gear plate (740) connected to the protection mechanism (200) through a latching tooth, a fifth rotating shaft (720) is mounted at the center of the gear plate (740), a mounting bearing seat (730) is mounted on the outer wall of the fifth rotating shaft (720) at one end of the gear plate (740), the bottom end of the mounting bearing seat (730) is fixedly mounted on the top end of the mounting base plate (300), a driving motor (710) is mounted on one end of the fifth rotating shaft (720), and the bottom end of the driving motor (710) is fixedly mounted on the top end of the mounting base plate (300) through a motor seat.

3. The intravenous infusion anti-leakage device according to claim 2, characterized in that: The protection mechanism (200) comprises a support assembly (210) connected to a gear plate (740) via latching teeth, both sides of the support assembly (210) are equipped with limit assemblies (220), a massage assembly (230) is installed at one end of the limit assembly (220) away from the support assembly (210), a restraining assembly (240) is arranged on the outer wall of the massage assembly (230), and a skin-friendly assembly (250) is arranged on the inner wall of the massage assembly (230).

4. The intravenous infusion anti-leakage device according to claim 3, characterized in that: The support assembly (210) comprises a connecting disk (211), the outer wall of the connecting disk (211) is equipped with a sector gear bar (219), the sector gear bar (219) is connected to the gear disk (740) by means of a tooth meshing connection, both ends of the connecting disk (211) are rotatably connected to a rotating disk (212), one end of the rotating disk (212) away from the connecting disk (211) is equipped with a connecting block (213), the number of the connecting blocks (213) is three groups, the three groups of connecting blocks (213) are arranged in an array with equal distances along the circumferential direction of the rotating disk (212), a limiting disk (214) is installed at one end of the connecting block (213) away from the rotating disk (212), the outer wall of the rotating disk (212) is provided with a swing plate (215), the swing plate (215) ) is provided with locking members (216) extending through both ends thereof, and the locking members (216) are used to limit the two sets of swing plates (215). One end of the connecting disk (211) is provided with a fan-shaped slide groove (217) extending through the other end thereof, and the fan-shaped slide groove (217) is adapted to the outer wall size of the locking member (216). The two ends of the connecting disk (211) are provided with limiting brackets (218) on one side of the rotating disk (212), and the limiting brackets (218) rotate with the inner wall of the shell member (100) through the slide groove. The limiting brackets (218) cooperate with the shell member (100) to support the protective mechanism (200). There are two sets of limiting brackets (218), and both ends of the limiting brackets (218) are provided with stop disks.

5. The intravenous infusion anti-leakage device according to claim 4, characterized in that: The limiting assembly (220) comprises a first rotating shaft (221) rotatably connected to the connecting plate (211); the outer wall of the first rotating shaft (221) is equipped with a guide arm (222); the outer wall of the guide arm (222) is sleeved with a limiting sleeve (223); the top and bottom ends of the limiting sleeve (223) are both provided with a second rotating shaft (224); a connecting seat (225) is installed at one end of the guide arm (222) away from the first rotating shaft (221); the connecting seat (225) is rotatably connected to the guide arm (222); the limiting plate (214) and the rotating plate (212) are provided with a limiting hole matching the second rotating shaft (224); and the connecting seat (225) is fixedly connected to the massage assembly (230).

6. The intravenous infusion anti-leakage device according to claim 5, characterized in that: The massage component (230) includes an arc-shaped plate (231) connected to the connecting seat (225), the arc-shaped plate (231) is in the shape of an arc-shaped long plate as a whole, the number of the arc-shaped plates (231) is three groups, the three groups of arc-shaped plates (231) are arranged in an array equidistantly along the circumferential direction to form a ring, the arc-shaped plate (231) is provided with a third rotating shaft (232) penetrating to both ends thereof, both ends of the third rotating shaft (232) are equipped with connecting arms (233), a fourth rotating shaft (234) is installed on the side of the connecting arm (233) away from the third rotating shaft (232), and a massage roller (235) is sleeved on the outer wall of the fourth rotating shaft (234).

7. The intravenous infusion anti-leakage device according to claim 6, characterized in that: The restraining component (240) comprises a connecting sleeve (241) fitted to the outer wall of the arc-shaped plate (231), the interior of the connecting sleeve (241) is connected to a limiting spring coil (242), and the outer walls at both ends of the massage component (230) are sleeved with two groups of restraining components (240).

8. The intravenous infusion anti-leakage device according to claim 6, characterized in that: The skin-friendly component (250) comprises a high-strength rubber strip (251) which is in contact with the inner wall of the massage roller (235), wherein the interior of the high-strength rubber strip (251) is provided with through holes (252) extending through both ends thereof, and a high-strength connecting strip (253) is mounted on one side of the high-strength rubber strip (251).

9. The intravenous infusion anti-leakage device according to claim 1, characterized in that: The shell member (100) comprises a flip cover and a connecting shell, the flip cover and the connecting shell are rotatably connected via a hinge shaft, the connecting shell is detachably connected to the mounting base plate (300) via a snap-on mechanism, a first heating device is installed on the inner wall of the connecting shell, the placement pad (500) is detachably connected to the raised base (600), the placement pad (500) is hollow inside, a second heating device is placed inside the placement pad (500), and the first heating device and the second heating device are connected in series via a control switch.

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