Foam cutter
By introducing a temperature control module and a self-recovery fuse protection module into the heating pen, combined with the plug-in pen head design, the overcurrent and high temperature problems of existing heating pen pens are solved when cutting foam, achieving higher safety and efficiency.
Patent Information
- Application Number
- CN202421866293.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-08-05
AI Technical Summary
Existing heating pens lack overcurrent protection and internal line temperature control when cutting foam, which can easily lead to fire and high temperature damage, and cannot cut long objects at one time, so the pen tip needs to be replaced.
A foam cutter is designed, adopting a dual protection mechanism: the temperature control module and the self-recovery fuse protection module are set internally to monitor current and temperature to prevent overcurrent and overheating; the pen tip is designed to support the replacement of pen tips of different lengths.
It effectively prevents wires from overheating due to overcurrent, reduces fire risk, extends the service life of the equipment, improves the efficiency and safety of the heating pen, and supports one-time cutting of long objects.
Smart Images
Figure CN222858256U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heating pens, in particular to a foam cutter. Background Art
[0002] The use of electric heating wire heating and hot melt principles to cut plastic boards, sponge boards, foam boards and other fusible materials has been widely used in the industry. The specific application of the handheld electric heating cutting pen using the electric heating principle to cut foam KT boards is to use the hot melt principle to cut foam materials. Compared with other traditional mechanical cutting methods, it has the advantages of smooth cutting end faces, less debris generated during use, and fast cutting speed.
[0003] At present, the pen tips of existing heating pens on the market are generally directly connected to the heating structure, and the length of the pen tip is fixed. When the length of the object to be cut is greater than the length of the pen tip, the pen tip cannot cut through the foam at one time and another heating pen needs to be replaced for reheating and cutting again. There is no internal circuit temperature control protection and overcurrent protection module.
[0004] There are also some heating pens on the market that have built-in adjustable temperature modules, but they do not have current overload safety monitoring and internal wire temperature monitoring modules. If a high current is mistakenly connected, the line load will be too high and heat will cause a fire. Or if the power is forgotten to be turned off and the pen is left to dry burn for a long time, the internal temperature of the pen will overheat and melt the pen shell. All of the above not only poses a fire safety hazard, but also reduces the recycling efficiency of the heating pen.
[0005] Based on the above problems existing in the existing electric thermal cutting pen, it is necessary to design an electric thermal cutting pen with dual protection of overcurrent protection and internal circuit temperature control to facilitate the safe use of the electric thermal cutting pen in different environments. Utility Model Content
[0006] The purpose of the utility model is to provide a foam cutter to solve the problems raised in the above background technology.
[0007] The technical scheme of the utility model is: a foam cutter, comprising a pen shell one and a pen shell two, the sizes of the pen shell one and the pen shell two are adapted, a DC line one is clamped on the inner wall of one side of the pen shell one and the pen shell two, a DC line two is clamped on the inner wall of the other side of the pen shell one and the pen shell two, the DC line one and the DC line two are connected through a PVC wire, a prismatic joint is plugged into the inner wall of the other side of the pen shell one and the pen shell two, the prismatic joint is connected to the DC line two, a pen head is fixedly connected to the outer wall of one side of the prismatic joint, a pen tip is arranged on the outer wall of one side of the pen head, a slot is provided on the inner wall of the other side of the pen shell one and the pen shell two, a fixed disc is plugged into the inner wall of the slot, a temperature control module and a resettable fuse protection module are installed on the bottom inner wall of the pen shell two, the closed thermostat and the resettable fuse protection module are connected in series with the PVC wire, and a closed thermostat chip is placed on the positive electrode of the PVC wire and fixed with a high temperature resistant adhesive tape.
[0008] Preferably, the DC line 1 is connected to an adjustable power supply, the slots are arranged in a semicircular shape, the slots are adapted to the size of the fixed disc, and threaded holes are provided on both side outer walls of the pen housing 1 and the pen housing 2.
[0009] Preferably, the inner walls of the other sides of the pen housings 1 and 2 are provided with slots, the slots are arranged in a trapezoidal shape, the prismatic joints are arranged in a hexagonal shape, and the prismatic joints are adapted to the size of the slots.
[0010] Preferably, a hexagonal hole is opened on an outer wall of one side of the fixed disc, the prismatic joint is slidably connected to the inner wall of the hexagonal hole, and fireproof cotton is fixedly connected to the outer wall of the other side of the fixed disc.
[0011] Preferably, the fireproof cotton is made of aluminum silicate, and the outer wall of the prismatic joint is fixedly connected with a magnetic block, the magnetic block is arranged in a ring shape, and the size of the magnetic block is adapted to that of the fixed disc.
[0012] Preferably, the inner walls of the pen housing 1 and the pen housing 2 are provided with wire storage grooves, and the DC wire 1, the DC wire 2 and the PVC wire are all adapted to the sizes of the wire storage grooves.
[0013] The utility model provides a foam cutter through improvement, which has the following improvements and advantages compared with the prior art:
[0014] First: The utility model is provided with a pen shell 1, a pen shell 2, a resettable fuse protection module, a temperature control module, a DC line 1, a DC line 2 and a pen head, and an adjustable power supply is connected to the DC line 1. The pen head of the heating pen is a plug-in design. When replacing pen heads of different lengths, you can directly pull out and replace the pen head of the corresponding length. The operation is simple and convenient. A PTC polymer resettable fuse protection module is added to the heating pen circuit. It is a new generation of overcurrent protection product, which is mainly used for real-time monitoring of overcurrent conditions in circuits. It belongs to a temperature sensing circuit cutting device. The resettable fuse module (PTC polymer resettable fuse module) automatically disconnects the circuit when the circuit current is too large, protects the wires and heating elements from overcurrent damage, and prevents the occurrence of fire. When the current returns to normal, the resettable fuse will automatically restore the conductive state without replacement. This function effectively prevents the wires from overheating due to overcurrent, reduces the risk of fire, extends the service life of the equipment, reduces maintenance costs, and improves the use efficiency of the heating pen.
[0015] Second: The utility model is provided with a fixed disc and fireproof cotton, and a card groove is provided on the inner wall of the pen shell one and the pen shell two. The card-connected fixed disc supports the prismatic joint, and fireproof cotton is arranged on the back of the fixed disc. The fireproof cotton is made of aluminum silicate, which improves the fireproof performance of the heating pen.
[0016] Third: The utility model is provided with a prismatic joint and a magnetic block. The magnetic block is fixedly connected to the outer wall of the prismatic joint. The magnetic block has a high distance temperature to avoid being affected by high temperature. Every time the pen tip is replaced, the magnetic block is adsorbed and connected to the fixed disc to prevent it from falling off and affecting the cutting of the product, thereby improving the practicality of the heating pen.
[0017] Fourthly: The multifunctional handle of the utility model is highly extensible and can be extended to multiple product series. Not only can replaceable plug-in pen tips be produced, but also other types of products can be extended according to the inner wall slot disc. By replacing pen tips with different appearances, the diversified use of the product can be achieved. This design greatly improves the adaptability and economy of the product, so that the same handle can be matched with heating heads of different functions and shapes, reducing production costs, avoiding waste of resources, and meeting the diverse needs of users. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:
[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0020] Figure 2 It is an exploded schematic diagram of the connection structure of the pen shell 1 and the pen shell 2 of the utility model;
[0021] Figure 3 It is a schematic diagram of the second structure of the pen shell of the utility model;
[0022] Figure 4 It is an exploded schematic diagram of the prismatic joint connection structure of the utility model.
[0023] Description of reference numerals:
[0024] 1. Pen shell one; 2. Pen shell two; 3. Prismatic joint; 4. Fixed disc; 5. DC line one; 6. Pen tip; 7. Wire storage slot; 8. Pen tip; 9. Threaded hole; 10. DC line two; 11. Temperature control module; 12. Card slot; 13. Slot; 14. Magnetic block; 15. Fireproof cotton. DETAILED DESCRIPTION
[0025] The utility model is described in detail below, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] The utility model provides a foam cutter through improvement. The technical solution of the utility model is:
[0027] like Figure 1-Figure 4 As shown, a foam cutter comprises a pen shell 1 and a pen shell 2, the sizes of the pen shell 1 and the pen shell 2 are adapted, a DC line 5 is clamped on the inner wall of one side of the pen shell 1 and the pen shell 2, a DC line 2 10 is clamped on the inner wall of the other side of the pen shell 1 and the pen shell 2, the DC line 5 and the DC line 2 10 are connected through a PVC wire, a prismatic joint 3 is inserted into the inner wall of the other side of the pen shell 1 and the pen shell 2, the prismatic joint 3 is connected to the DC line 2 10, a pen head 8 is fixedly connected to the outer wall of one side of the prismatic joint 3, a pen tip 6 is arranged on the outer wall of one side of the pen head 8, a slot 13 is opened on the inner wall of the other side of the pen shell 1 and the pen shell 2, a fixed disc 4 is inserted on the inner wall of the slot 13, a temperature control module 11 and a resettable fuse protection module are installed on the bottom inner wall of the pen shell 2, and the temperature control module 11 and the resettable fuse protection module are connected to the PVC wire.
[0028] Furthermore, the DC line 15 is connected to the adjustable power supply, the slot 13 is arranged in a semicircular shape, and the slots 13 are adapted to the size of the fixed disc 4. The outer walls of both sides of the pen shell 1 and the pen shell 2 are provided with threaded holes 9, and the inner walls of the other sides of the pen shell 1 and the pen shell 2 are provided with card slots 12, and the card slots 12 are arranged in a trapezoidal shape. The prismatic joint 3 is arranged in a hexagonal shape, and the prismatic joint 3 is adapted to the size of the card slot 12. When installing, the pen shell 1 is buckled onto the pen shell 2, and the screws in the threaded holes 9 on the outer walls of the pen shell 1 and the pen shell 2 are turned to fix them.
[0029] Furthermore, a hexagonal hole is provided on the outer wall of one side of the fixed disc 4, and the prismatic joint 3 is slidably connected to the inner wall of the hexagonal hole. A fireproof cotton 15 is fixedly connected to the outer wall of the other side of the fixed disc 4. The fireproof cotton 15 is made of aluminum silicate. A magnetic block 14 is fixedly connected to the outer wall of the prismatic joint 3. The magnetic block 14 is arranged in a ring shape, and the size of the magnetic block 14 is adapted to the size of the fixed disc 4. A wire storage groove 7 is provided on the inner wall of the pen shell 1 and the pen shell 2. The DC wire 1 5, the DC wire 2 10 and the PVC wire are all adapted to the size of the wire storage groove 7. A magnetic block 14 is fixedly connected to the wall, and the magnetic block 14 has a high distance temperature to avoid being affected by high temperature. Every time the pen tip 8 is replaced, the magnetic block 14 is adsorbed and connected to the fixed disc 4 to prevent it from falling off and affecting the cutting of the product. The handle composed of the pen shell 1 and the pen shell 2 has multi-functional extensibility and can be extended to multiple product series, avoiding waste of resources. Traditional heating pens usually produce one product with one mold, while the internal structure of the present design supports heating pens of multiple series and different shapes. Different pen tips 8 can be replaced through one handle to achieve diversified use of products.
[0030] Working principle: During installation, the pen case 1 is buckled onto the pen case 2, and the screws in the threaded holes 9 on the outer walls of the pen case 1 and the pen case 2 are screwed to fix them. The pen head 8 of the prismatic joint 3 is directly inserted from one side of the fixed disc 4. The prismatic joint 3 is directly connected to the DC line 2 10 inside the pen case 2, and the DC line 1 5 is connected to the adjustable power supply. After power is turned on, the pen head 8 is heated, and the pen tip 6 starts to cut the foam as it heats up. The thickness of the cut foam begins to change. When the pen head 8 needs to be replaced, the pen head 8 is pulled out with a high-temperature resistant tool, and the prismatic joint 3 is separated from the DC line 2 10 and removed from the pen case 1 and the pen case 2, and the pen head 8 of the corresponding length is inserted. A PTC polymer resettable fuse module (Polymer PTC) is used to monitor the current in real time, and is connected in series with the temperature control module 11 chip. The resettable fuse will automatically disconnect the circuit when the current is too large to protect the wires and heating elements from overcurrent damage. When the current returns to normal, the resettable fuse will automatically return to the on state without replacement. The temperature control module 11 is set inside to control the temperature of the wire. If the temperature of the PVC wire exceeds 65 degrees, the automatic power-off protection is turned on to reduce the possibility of fire. An adjustable power supply is connected to the DC line 5, and the temperature of the heating pen is adjusted according to the power of the adjustable power supply. To avoid short circuits and fires, a closed temperature control module is integrated inside the heating pen. The power-off temperature protection threshold is 60°C (can be adjusted according to the actual wire conditions). When heating is caused by non-current overload reasons, such as heating caused by the quality of the wire itself or leakage short circuit, the self-resetting fuse module cannot work normally. When the temperature control module senses that the surface temperature of the wire exceeds 60°C (considering that the normal working temperature of ordinary PVC wire is between 0°C and 60°C, working above 60°C for a long time will cause the wire to become soft, hot, or even melt), it will automatically cut off the power for protection. Generally speaking, the temperature control module monitors the temperature of the external circuit, and the resettable fuse module monitors the internal current overcurrent. The double protection combination greatly reduces the occurrence of potential safety hazards and ensures the safe use of users in various operating environments. A card slot 12 is provided on the inner wall of the pen shell 1 and the pen shell 2. The card-connected fixed disc 4 supports the prismatic joint 3, and cooperates with the fireproof cotton 15 on the back of the fixed disc 4 to improve the fireproof ability. The fireproof cotton 15 is made of aluminum silicate. A magnetic block 14 is fixedly connected to the outer wall of the prismatic joint 3. The magnetic block 14 has a high distance temperature to avoid being affected by high temperature. Every time the pen head 8 is replaced, the magnetic block 14 is adsorbed and connected to the fixed disc 4 to prevent it from falling off and affecting the cutting of the product. The pen head 8 is of three types, including cylindrical, bullet-shaped and hexagonal prism-shaped, all of which can be directly connected to the fixed disc 4, thereby being inserted into the structure composed of the pen shell 1 and the pen shell 2.
[0031] The technical means disclosed in the utility model are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacement of the above technical features. Matters not covered in the utility model belong to the common knowledge of those skilled in the art.
Claims
1. A foam cutter, comprising a pen housing 1 (1) and a pen housing 2 (2), characterized in that: The size of the pen case 1 (1) and the pen case 2 (2) are adapted, a DC line 1 (5) is clamped on the inner wall of one side of the pen case 1 (1) and the pen case 2 (2), a DC line 2 (10) is clamped on the inner wall of the other side of the pen case 1 (1) and the pen case 2 (2), the DC line 1 (5) and the DC line 2 (10) are connected through a PVC wire, a prismatic joint (3) is inserted into the inner wall of the other side of the pen case 1 (1) and the pen case 2 (2), the prismatic joint (3) is connected to the DC line 2 (10), A pen head (8) is fixedly connected to an outer wall of one side of the prismatic joint (3); a pen tip (6) is arranged on an outer wall of one side of the pen head (8); a slot (13) is provided on the inner wall of the other side of the pen housing (1) and the pen housing (2); a fixed disc (4) is inserted into the inner wall of the slot (13); a temperature control module (11) and a resettable fuse protection module are installed on the inner wall of the bottom of the pen housing (2); and the temperature control module (11) and the resettable fuse protection module are connected to the PVC wire.
2. A foam cutter according to claim 1, characterized in that: The DC line 1 (5) is connected to an adjustable power supply, the slots (13) are arranged in a semicircular shape, and the slots (13) are adapted to the size of the fixed disc (4), and threaded holes (9) are provided on the outer walls of both sides of the pen housing 1 (1) and the pen housing 2 (2).
3. A foam cutter according to claim 1, characterized in that: The inner walls of the other sides of the pen housing 1 (1) and the pen housing 2 (2) are both provided with a slot (12), the slot (12) is arranged in a trapezoidal shape, the prism joint (3) is arranged in a hexagonal shape, and the prism joint (3) is adapted to the size of the slot (12).
4. A foam cutter according to claim 1, characterized in that: A hexagonal hole is provided on one outer wall of the fixed disc (4), the prismatic joint (3) is slidably connected to the inner wall of the hexagonal hole, and a fireproof cotton (15) is fixedly connected to the other outer wall of the fixed disc (4).
5. A foam cutter according to claim 4, characterized in that: The fireproof cotton (15) is made of aluminum silicate. The outer wall of the prismatic joint (3) is fixedly connected with a magnetic block (14). The magnetic block (14) is arranged in a ring shape, and the size of the magnetic block (14) is adapted to that of the fixed disc (4).
6. A foam cutter according to claim 1, characterized in that: The inner walls of the pen housing 1 (1) and the pen housing 2 (2) are provided with wire storage grooves (7), and the DC wire 1 (5), the DC wire 2 (10) and the PVC wire are all adapted to the size of the wire storage grooves (7).