A soft and hard plastic molded electronic thermometer

Abstract

This utility model discloses an electronic thermometer injection molded from soft and hard plastic molds, including a main body, a temperature sensing part, and an electronic component located in the main body and / or the temperature sensing part; the main body and the temperature sensing part have different Shore hardness, the main body is provided with grooves and / or locking blocks, and the temperature sensing part is integrally injection molded with the main body through the grooves and / or locking blocks, which greatly reduces the risk of falling off through a dual connection method of mechanical locking and fusion bonding.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to an electronic thermometer injection molded from soft and hard plastic molds. Background Technology

[0002] Electronic thermometers are widely used in homes and medical settings due to their convenience, clear readings, and high safety. However, most electronic thermometers on the market currently use a single-material casing or are simply assembled with a combination of hard and soft adhesives, which has the following drawbacks:

[0003] Poor structural stability: Traditional soft and hard adhesives are often joined by bonding or snap-fit ​​splicing, which can easily lead to detachment and gaps after long-term use, affecting the product's sealing performance and service life.

[0004] The process is complicated: it requires the production of hard plastic substrate and soft plastic parts in separate steps, followed by secondary assembly, resulting in low production efficiency and assembly errors that can affect measurement accuracy.

[0005] To address the aforementioned issues, there is an urgent need for an electronic thermometer that combines soft and hard plastic structures through an integrated injection molding process, in order to optimize product performance and improve production efficiency. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology, this utility model provides an electronic thermometer injection molded from soft and hard plastic molds.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] This utility model provides an electronic thermometer injection molded from soft and hard plastic molds, including a main body, a temperature sensing part, and an electronic component located in the main body and / or the temperature sensing part; the Shore hardness of the main body and the temperature sensing part are different, the main body is provided with grooves and / or blocks, and the temperature sensing part is integrally injection molded with the main body through the grooves and / or blocks.

[0009] Preferably, the Shore hardness of the main body is greater than that of the temperature sensing part. The groove and / or the locking block are located at the end of the main body near the temperature sensing part. The main body is made of a material with a higher Shore hardness, which provides sufficient structural strength and support, ensuring the stability and durability of the overall structure of the electronic thermometer and making it resistant to damage from various external forces during daily use. The temperature sensing part is made of a material with a lower Shore hardness, making it softer and better conforming to the body measurement area, reducing gaps during measurement, and improving measurement accuracy and comfort. Placing the groove and / or the locking block at the end of the main body near the temperature sensing part provides a reasonable structural position for the connection between the two, facilitating a stable connection through these structures. This achieves the effects of improving product measurement accuracy, enhancing structural strength and durability, and optimizing the connection structure.

[0010] Preferably, a connecting part is provided at one end of the main body near the temperature sensing part. The connecting part and the main body are integrally injection molded. The groove and / or the locking block are provided on the main body through the connecting part. The connecting part is provided and connected to the main body through integral injection molding, so that the connecting part and the main body become a whole. This enhances the strength and stability of the connection part and avoids problems such as loosening and falling off that may occur due to additional assembly of connecting parts. The groove and / or the locking block are provided on the connecting part to provide a dedicated structural area for the connection between the temperature sensing part and the main body, making the connection more precise and stable. This achieves the effect of improving the strength of the connection part and ensuring a precise and stable connection.

[0011] Preferably, the groove is strip-shaped and located on the connecting part. The length direction of the groove is parallel to the length direction of the temperature sensing part. The strip-shaped groove and the parallel length direction of the temperature sensing part can effectively increase the contact area of ​​the temperature sensing part during injection molding. At the same time, the parallel arrangement can ensure the uniformity of the connection between the temperature sensing part and the main body in the length direction, making the force between the two more uniform, enhancing the stability of the connection, and ensuring a uniform and stable connection effect.

[0012] Preferably, the locking block is wedge-shaped and is located in the groove of the connecting part to limit the temperature sensing part. The wedge-shaped locking block design allows the locking block to effectively limit the temperature sensing part by utilizing its wedge structure, preventing the temperature sensing part from sliding out of the groove during use and enhancing the firmness of the connection.

[0013] Preferably, the connecting part and / or the main body part are provided with through holes. The through holes are used to accommodate the portion of the temperature sensing part that is molten and penetrated. The through holes provide a channel for the molten material to penetrate the temperature sensing part during the injection molding process, so that the temperature sensing part and the main body part can achieve a tighter bond through the fusion of the molten material, which enhances the connection strength between the two and avoids the gap and loosening problems that may occur due to simple mechanical connection. At the same time, this connection method also improves the overall sealing of the product, prevents external factors from affecting the internal electronic components, and achieves the effect of enhancing connection strength and improving sealing.

[0014] Preferably, the through hole is located on the main body, and the length direction of the through hole is parallel to the length direction of the groove. The through hole is connected to the groove. By setting the through hole on the main body and making it parallel to and connected to the groove, this layout allows the molten material to smoothly fuse through the through hole when the temperature sensing part is inserted into the groove, ensuring the consistency and uniformity of the connection. At the same time, the parallel and connected design facilitates the control of the flow direction and distribution of the molten material during injection molding, improving production efficiency and product quality, and achieving the effect of ensuring uniform connection, improving production efficiency and product quality.

[0015] Preferably, the end of the temperature sensing part away from the main body is provided with a cap made of thermally conductive material. The temperature sensing part contains a temperature sensor that works in conjunction with the cap and electronic components. The cap made of thermally conductive material can quickly and accurately conduct human body temperature to the temperature sensor in the temperature sensing part, improving the response speed and accuracy of temperature measurement. The temperature sensor, in conjunction with the cap and electronic components, can convert the temperature signal into an electronic signal in a timely manner, and process and display it through the electronic components, achieving the effect of rapid and accurate temperature measurement and efficient transmission and processing of temperature signals.

[0016] Preferably, the cap body contains thermally conductive silicone grease, and the temperature sensor is used in conjunction with the thermally conductive silicone grease and electronic components. The thermally conductive silicone grease has good thermal conductivity, and filling the cap body can further eliminate the tiny gaps between the cap body and the temperature sensor, reduce thermal resistance, and make temperature conduction smoother and more accurate, thereby improving the accuracy of temperature measurement. The temperature sensor, together with the thermally conductive silicone grease and electronic components, can receive and transmit temperature signals more stably, ensuring that the measurement results of the electronic thermometer are accurate and reliable, thus achieving the effect of improving the accuracy of temperature measurement and ensuring stable and reliable measurement results.

[0017] The injection-molded electronic thermometer using hard and soft plastic molds includes a hard plastic mold and a soft plastic mold. The hard plastic mold has a first cavity for forming the main body, through which ABS resin is used to form the main body. The soft plastic mold has a second cavity for housing the main body and forming the temperature-sensing part. The soft plastic mold also has a limiting structure for positioning the main body, through which TPU soft plastic is injected onto the main body. By using hard and soft plastic molds to injection mold the main body and temperature-sensing part respectively, and using ABS resin for injection molding the main body, the structural strength and stability of the main body are ensured. Using TPU soft plastic for injection molding gives the temperature-sensing part a soft texture that better conforms to the human body. The limiting structure in the soft plastic mold accurately fixes the main body in the appropriate position, ensuring precise connection and molding between the temperature-sensing part and the main body, improving product quality and production efficiency. This process allows for the simultaneous production of a main body and temperature-sensing part with different hardness and a stable connection, meeting the functional and structural requirements of the electronic thermometer and improving the overall performance and production efficiency of the product.

[0018] The beneficial effects of this utility model are:

[0019] Stable and reliable structure: Through a dual connection method of mechanical locking and fusion bonding, the bonding strength of soft and hard adhesives is increased by more than 40%, greatly reducing the risk of detachment; the stepped sealing platform design achieves a high level of waterproofing and extends the product's service life.

[0020] Improved production efficiency: The integrated injection molding process eliminates the secondary assembly process, shortens the production cycle by 30%, avoids assembly errors, and increases the product qualification rate to over 98%.

[0021] User experience optimization: The soft rubber temperature-sensing end conforms to human skin, significantly improving comfort; the soft rubber grip is non-slip and wear-resistant, while the hard rubber body ensures structural strength, balancing comfort and durability.

[0022] Cost reduction: Simplified production process and reduced number of parts reduce raw material and labor costs by about 20%. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is one of the structural schematic diagrams of the electronic thermometer of this utility model;

[0026] Figure 2 This is one of the schematic diagrams of the main structure of this utility model;

[0027] Figure 3 This is the second schematic diagram of the main body structure of this utility model;

[0028] Figure 4 This is the second schematic diagram of the electronic thermometer structure of this utility model;

[0029] Figure 5 This is an exploded view of the electronic thermometer of this utility model;

[0030] Figure 6 This is a schematic diagram of the injection molding process for soft and hard plastic molds according to this utility model.

[0031] The reference numerals in the figures include:

[0032] 1. Main body; 2. Temperature sensing part; 3. Electronic components; 4. Connecting part; 5. Cap body; 11. Lens; 12. Double-sided adhesive; 13. Bracket; 14. Elastic element; 15. Button part; 16. Battery cover; 17. Screw; 18. Battery box; 19. Button PCB; 110. Foam; 111. Main housing; 21. Temperature sensor; 31. LCD panel; 32. Backlight panel; 33. Conductive strip; 34. Button battery; 35. Circuit board; 41. Groove; 42. Clip; 43. Through hole; 51. Thermal grease. Detailed Implementation

[0033] Reference Figures 1 to 6An electronic thermometer injection molded from soft and hard plastic molds includes a main body 1, a temperature sensing part 2, and an electronic component 3 located in the main body 1 and / or the temperature sensing part 2; the main body 1 and the temperature sensing part 2 have different Shore hardnesses, the main body 1 is provided with a groove 41 and / or a locking block 42, and the temperature sensing part 2 is integrally injection molded with the main body 1 via the groove 41 and / or the locking block 42.

[0034] Through the above structural design, the main body 1 and the temperature sensing part 2 are molded separately using materials with different Shore hardness according to their different functional requirements. The temperature sensing part 2 uses a softer material to better fit the human body measurement area, improving measurement accuracy and comfort. The main body 1 uses a harder material to ensure the overall structural strength and durability. At the same time, the groove 41 and / or the locking block 42 are used to achieve an integrated structure, making the connection between the main body 1 and the temperature sensing part 2 tight and stable. This reduces the problems of loosening and falling off that may occur when connecting multiple parts in traditional assembly methods. This achieves the effects of improving product measurement performance, enhancing structural stability, simplifying the production process, and reducing the defect rate and production cost caused by multiple assembly steps.

[0035] Specifically, the Shore hardness of the main body 1 is greater than that of the temperature sensing part 2. The groove 41 and / or the locking block 42 are located at the end of the main body 1 near the temperature sensing part 2. The main body 1 uses a material with a higher Shore hardness, which can provide sufficient structural strength and support to ensure the stability and durability of the overall structure of the electronic thermometer and withstand various external forces in daily use without being easily damaged. The temperature sensing part 2 uses a material with a lower Shore hardness, making it softer and better conforming to the human body measurement area, reducing gaps during measurement, and improving the accuracy and comfort of measurement. The groove 41 and / or the locking block 42 are located at the end of the main body 1 near the temperature sensing part 2, providing a reasonable structural position for the connection between the two, which facilitates a stable connection through these structures, thereby improving the measurement accuracy, enhancing structural strength and durability, and optimizing the connection structure.

[0036] Specifically, a connecting part 4 is provided at one end of the main body 1 near the temperature sensing part 2. The connecting part 4 and the main body 1 are integrally injection molded. The groove 41 and / or the locking block 42 are provided on the main body 1 via the connecting part 4. The connecting part 4 is provided and connected to the main body 1 through integral injection molding, so that the connecting part 4 and the main body 1 become a whole, which enhances the strength and stability of the connecting part 4 and avoids problems such as loosening and falling off that may occur due to the additional assembly of the connecting part 4. The groove 41 and / or the locking block 42 are provided on the connecting part 4 to provide a dedicated structural area for the connection between the temperature sensing part 2 and the main body 1, making the connection more precise and stable, and achieving the effect of improving the strength of the connecting part 4 and ensuring the precise and stable connection.

[0037] Specifically, the groove 41 is strip-shaped and located on the connecting part 4. The length direction of the groove 41 is parallel to the length direction of the temperature sensing part 2. The strip-shaped groove 41 and the length direction of the temperature sensing part 2 are parallel. This design can effectively increase the contact area of ​​the temperature sensing part 2 during injection molding. At the same time, the parallel arrangement can ensure the uniformity of the connection between the temperature sensing part 2 and the main body part 1 in the length direction, making the force between the two more uniform, enhancing the stability of the connection, and ensuring a uniform and stable connection effect.

[0038] Specifically, the locking block 42 is wedge-shaped and is located in the groove 41 of the connecting part 4 to limit the temperature sensing part 2. The design of the wedge-shaped locking block 42 allows the locking block 42 to effectively limit the temperature sensing part 2 by using its wedge structure, preventing the temperature sensing part 2 from sliding out of the groove 41 during use and enhancing the firmness of the connection.

[0039] Specifically, the connecting part 4 and / or the main body part 1 are provided with through holes 43. The through holes 43 are used to accommodate the portion of the temperature sensing part 2 that has been melted through. The through holes 43 provide a channel for the molten material to pass through the temperature sensing part 2 during the injection molding process, so that the temperature sensing part 2 and the main body part 1 can achieve a tighter bond through the fusion of the molten material, which enhances the connection strength between the two and avoids the gap and loosening problems that may occur due to simple mechanical connection. At the same time, this connection method also improves the overall sealing of the product and prevents external factors from affecting the internal electronic components 3, thus achieving the effect of enhancing connection strength and improving sealing.

[0040] Specifically, a through hole 43 is provided on the main body 1. The length direction of the through hole 43 is parallel to the length direction of the groove 41, and the through hole 43 is connected to the groove 41. By setting the through hole 43 on the main body 1 and making it parallel to and connected to the groove 41, this arrangement allows the molten material to be smoothly fused through the through hole 43 when the temperature sensing part 2 is inserted into the groove 41, ensuring the consistency and uniformity of the connection. At the same time, the parallel and connected design facilitates the control of the flow direction and distribution of the molten material during the injection molding process, improving production efficiency and product quality, and achieving the effects of ensuring the uniformity of the connection, improving production efficiency and product quality.

[0041] Specifically, the end of the temperature sensing part 2 away from the main body 1 is provided with a cap 5 made of a heat-conducting material. The temperature sensing part 2 is provided with a temperature sensor 21 that works in conjunction with the cap 5 and the electronic components 3. The cap 5, made of a heat-conducting material, can quickly and accurately conduct human body temperature to the temperature sensor 21 in the temperature sensing part 2, improving the response speed and accuracy of temperature measurement. The temperature sensor 21, in conjunction with the cap 5 and the electronic components 3, can convert the temperature signal into an electronic signal in a timely manner, and process and display it through the electronic components 3, achieving the effect of rapid and accurate temperature measurement and efficient transmission and processing of temperature signals.

[0042] Specifically, the cap body 5 contains thermal grease 51, and the temperature sensor 21 is used in conjunction with the thermal grease 51 and the electronic components 3. The thermal grease 51 has good thermal conductivity, and filling the cap body 5 can further eliminate the tiny gap between the cap body 5 and the temperature sensor 21, reduce thermal resistance, make temperature conduction smoother and more accurate, and improve the accuracy of temperature measurement. The temperature sensor 21, together with the thermal grease 51 and the electronic components 3, can receive and transmit temperature signals more stably, ensuring that the measurement results of the electronic thermometer are accurate and reliable, thus achieving the effect of improving the accuracy of temperature measurement and ensuring the stability and reliability of the measurement results.

[0043] Specifically, a stepped sealing platform is formed at the connection between the main body 1 and the connecting part 4. The stepped sealing platform design achieves a high level of waterproofing and extends the product's service life.

[0044] An electronic thermometer injection molded from hard and soft plastic molds includes a hard plastic mold and a soft plastic mold. The hard plastic mold has a first cavity for forming the main body 1. The hard plastic mold is used to form the main body 1 from ABS resin material through the first cavity. The soft plastic mold has a second cavity for accommodating the main body 1 and forming the temperature sensing part 2. The soft plastic mold also has a limiting structure for limiting the main body 1. The soft plastic mold is used to inject TPU soft plastic onto the main body 1 through the second cavity.

[0045] The main body 1 and the temperature sensing part 2 are injection molded using hard and soft plastic molds respectively. The main body 1 is injection molded using ABS resin, ensuring its structural strength and stability. The temperature sensing part 2 is injection molded using TPU soft plastic, giving it a soft texture that better conforms to the human body. The limiting structure within the soft plastic mold accurately fixes the main body 1 in the appropriate position, ensuring precise connection and molding of the temperature sensing part 2 with the main body 1, thus improving product quality and production efficiency. This process enables the simultaneous production of the main body 1 and the temperature sensing part 2, which have different hardnesses and are firmly connected, meeting the functional and structural requirements of the electronic thermometer and improving the overall performance and production efficiency of the product.

[0046] Preferably, a soft and hard plastic mold injection molding process includes the following steps:

[0047] (1) Inject ABS raw material into a hard plastic mold, melt it at 180-200℃ and mold it into a hard plastic body (i.e., body part 1) under injection pressure of 80-100 bar.

[0048] (2) Transfer the hard plastic body (i.e., the main body 1) to the soft plastic mold, inject TPU raw material, melt at 170-190℃ and inject at 60-80 bar to make the soft plastic (i.e. the temperature sensing part 2) and the hard plastic body (i.e., the main body 1) bond together to form a mold.

[0049] (3) After cooling, open the mold and remove the product. Remove the sprue material to obtain the integrated structure product.

[0050] Specifically, in this embodiment, the hard plastic mold and the soft plastic mold are precisely aligned, with a positioning error of ≤0.05mm.

[0051] Preferably, the hard plastic body is made of ABS material, with a length of 120mm, a width of 25mm, and a thickness of 15mm; the front end has an annular groove with a depth of 2mm and a width of 3mm, and four wedge-shaped blocks (5mm long, 3mm wide, and 2mm high) are evenly distributed; the middle part has three axial protrusions (1mm high and 40mm long) and six through holes with a diameter of 2mm.

[0052] Preferably, the soft rubber temperature sensing end (i.e., temperature sensing part 2) is made of TPU material with a Shore hardness of 50A, is arc-shaped, 15mm in length and 8mm in diameter, and has an NTC temperature sensor embedded inside.

[0053] Preferably, a soft rubber grip can also be provided at the soft rubber temperature sensing end: made of TPU material with a Shore hardness of 60A, 2mm thick, and with anti-slip texture on the surface.

[0054] Specifically, the main body 1 includes a main housing 111, a bracket 13 is mounted on the main housing 111, a double-sided adhesive 12 is mounted on the bracket 13, and a transparent lens 11 is attached to the side of the double-sided adhesive 12 away from the bracket 13.

[0055] Specifically, a circuit board 35 is provided inside the main housing 111, and foam 110 is provided between the circuit board 35 and the main housing 111.

[0056] Specifically, a conductive strip 33 is electrically connected to the circuit board 35, and the conductive strip 33 is used in conjunction with the temperature sensor 21.

[0057] Specifically, the circuit board 35 is also electrically connected to the LCD panel 31 and the backlight panel 32. The LCD panel 31 and the backlight panel 32 are used together to realize the digital display of temperature.

[0058] Specifically, the bracket 13 works in conjunction with the main housing 111 to clamp and limit the LCD panel 31, backlight panel 32, and circuit board 35, etc.

[0059] Specifically, the electronic thermometer also includes a battery cover 16, which is used to house an external button battery 34, which is used to power the electronic components inside the electronic thermometer.

[0060] Specifically, the circuit board 35 is equipped with a button PCB19, which is used to control the working status of the electronic thermometer.

[0061] Specifically, the main housing 111 is provided with a battery cover 16, which is fixed to the main housing 111, circuit board 35 or bracket 13 by external screws 17.

[0062] Specifically, the battery cover 16 is provided with a button part 15, and an elastic element 14 is provided between the button part 15 and the button PCB 19.

[0063] Specifically, the elastic element 14 is a spring.

[0064] Preferably, the circuit board 35, button battery 34, LCD panel 31 and button part 15 are all integrated inside the hard plastic body (i.e., the main body part 1), and have no direct contact with the soft plastic part (i.e., the temperature sensing part 2), so as to avoid damage during the injection molding process.

[0065] Preferably, the process parameters are as follows:

[0066] Hard plastic injection molding: Barrel temperature 180-200℃ (front section 200℃, middle section 190℃, rear section 180℃), mold temperature 50-60℃, injection pressure 90bar, holding pressure 60bar, holding time 35s, cooling time 25s.

[0067] Soft rubber injection molding: barrel temperature 170-190℃ (front section 190℃, middle section 180℃, rear section 170℃), mold temperature 40-50℃, injection pressure 70bar, holding pressure 50bar, holding time 30s, cooling time 20s.

[0068] The above description provides one or more embodiments in conjunction with specific content, but it is not intended that the specific implementation of this utility model is limited to these descriptions. Any methods or structures that are similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered within the scope of protection of this utility model.

Claims

1. A soft and hard plastic injection molded electronic thermometer, comprising a main body (1), a temperature sensing part (2), and an electronic component (3) located in the main body (1) and / or the temperature sensing part (2); characterized in that: The Shore hardness of the main body (1) and the temperature sensing part (2) are different. The main body (1) is provided with a groove (41) or a locking block (42). The temperature sensing part (2) is integrally injection molded with the main body (1) via the groove (41) or the locking block (42).

2. The soft and hard rubber mold injection electronic thermometer according to claim 1, characterized in that: The Shore hardness of the main body (1) is greater than that of the temperature sensing part (2), and a groove (41) and / or a locking block (42) are provided at one end of the main body (1) near the temperature sensing part (2).

3. The soft and hard rubber mold injection electronic thermometer according to claim 1, characterized in that: A connecting part (4) is provided at one end of the main body (1) near the temperature sensing part (2). The connecting part (4) and the main body (1) are integrally injection molded. The groove (41) and the locking block (42) are provided on the main body (1) via the connecting part (4).

4. The soft and hard rubber mold injection electronic thermometer according to claim 3, characterized in that: The groove (41) is strip-shaped and located on the connecting part (4). The length direction of the groove (41) is parallel to the length direction of the temperature sensing part (2).

5. The soft and hard rubber mold injection electronic thermometer according to claim 3, characterized in that: The locking block (42) is wedge-shaped and located in the groove (41) to limit the temperature sensing part (2).

6. The soft and hard rubber mold injection electronic thermometer according to claim 3, characterized in that: The connecting part (4) and / or the main body part (1) are provided with through holes (43), which are used to accommodate the part of the temperature sensing part (2) that has been melted through.

7. The soft and hard rubber mold injection electronic thermometer according to claim 6, characterized in that: A through hole (43) is provided on the main body (1). The length direction of the through hole (43) is parallel to the length direction of the groove (41), and the through hole (43) and the groove (41) are connected.

8. The soft and hard rubber mold injection electronic thermometer according to claim 1, characterized in that: The end of the temperature sensing part (2) away from the main body (1) is provided with a cap (5) made of heat-conducting material, and the temperature sensing part (2) is provided with a temperature sensor (21) used in conjunction with the cap (5) and electronic components (3).

9. The soft and hard rubber mold injection electronic thermometer according to claim 8, characterized in that: The cap body (5) contains thermal grease (51), and the temperature sensor (21) is used in conjunction with the thermal grease (51) and electronic components (3).

10. The soft and hard rubber mold injection molded electronic thermometer according to any one of claims 1 to 9, characterized in that: The mold includes a hard mold and a soft mold. The hard mold has a first cavity for forming the main body (1). The hard mold is used to form the main body (1) by ABS resin material through the first cavity. The soft mold has a second cavity for accommodating the main body (1) and forming the temperature sensing part (2). The soft mold also has a limiting structure for limiting the main body (1). The soft mold is used to inject TPU soft material onto the main body (1) through the second cavity.

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