Standard headform

Abstract

The present application relates to standard head mould, including head mould, be used to support head mould support assembly, the inside of head mould is provided with trachea, the upper end of trachea is installed in the mouth of head mould and the upper end of trachea is communicated with the mouth of head mould, the upper part of trachea is provided with detection assembly, support assembly includes upper base, lower base, the support leg of fixed installation in the lower end of lower base, the upper end of upper base is provided with the positioning convex slot matched with the bottom of head mould, the central of upper base and lower base is provided with the through hole one for the lower part of trachea, the standard head mould of the present application is designed to refer to international standard ISO 16900-5:2016, ISO 16900-5:2018 (Amendment-1) and ISO / TS 16976-2:2015, can be used for the detection of dead space, noise of medical respiratory protection product, its structure design is reasonable, and installation, dismounting operation is simple and convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to a standard headform, belonging to the technical field of medical instrument experiment equipment. BACKGROUND

[0002] The headform is an important tool for the research and detection of medical respiratory protection products. In order to ensure the scientific and reliable results, the size and structure of the headform should meet the characteristics of Asian face shape, and the size tolerance of the finished headform should be within a controllable range. At present, the headform products on the market all claim to be processed and manufactured according to the size requirements of the corresponding standards, but there is a lack of verification method for the size of the finished headform, resulting in great differences in the size of headforms of different brands. The present application refers to the requirements of international standards ISO 16900-5:2016, ISO 16900-5:2018 (Amendment-1) and ISO / TS 16976-2:2015 for the size of the standard headform, and the Chinese face shape data is included in the standard. On this basis, other structures are designed and added for the detection of the dead space, noise and air supply of medical respiratory protection products. SUMMARY

[0003] The present application provides a standard headform to overcome the deficiencies of the prior art, and the specific technical solutions are as follows:

[0004] The standard headform comprises a headform and a support assembly for supporting the headform, the inside of the headform is provided with an air pipe, the upper end of the air pipe is installed in the mouth part of the headform and the upper end of the air pipe is in communication with the mouth part of the headform, the upper part of the air pipe is provided with a detection assembly, the support assembly comprises an upper base, a lower base and a support leg fixedly installed at the lower end of the lower base, the upper end of the upper base is provided with a positioning convex groove matched with the bottom of the headform, the upper base and the lower base are threadedly connected, and the center of the upper base and the center of the lower base are both provided with a through hole one for the lower part of the air pipe to pass through.

[0005] As an improvement of the above technical solution, the detection assembly comprises a mounting ring sleeved on the upper part of the air pipe, a temperature sensor for detecting the temperature in the air pipe, a carbon dioxide sensor for detecting the carbon dioxide content in the air pipe, and a pressure sensor for detecting the air pressure in the air pipe, one side of the upper part of the air pipe is provided with a catheter one connected with the sensing end of the temperature sensor, the distal end of the catheter one penetrates the upper part of the air pipe and the distal end of the catheter one is located in the inside of the air pipe, the other side of the upper part of the air pipe is provided with a catheter two connected with the sensing end of the carbon dioxide sensor, the distal end of the catheter two penetrates the upper part of the air pipe and the distal end of the catheter two is located in the inside of the air pipe; a circle of air holes is arranged on the outer periphery of the upper part of the air pipe, a first annular groove is arranged on the inner circle of the mounting ring, the first annular groove is sleeved on the outside of the air holes and the air holes are in communication with the first annular groove, a screw hole for mounting the sensing end of the pressure sensor is further arranged on the outside of the mounting ring, and the screw hole and the first annular groove are connected through a through hole two.

[0006] As the improvement of the above technical scheme, the inner ring of the mounting ring is further provided with a second annular groove for accommodating the sealing ring, and the two second annular grooves are respectively arranged on the two sides of the first annular groove.

[0007] As the improvement of the above technical scheme, the first end of the mounting ring is provided with two protruding plates arranged oppositely, and the end of the protruding plate is provided with an L-shaped clamping groove.

[0008] As the improvement of the above technical scheme, the inner side surface of the protruding plate is provided with an inclined arc surface, the thickness of the end of the protruding plate is smaller than the thickness of the first end of the protruding plate, and the first end of the protruding plate is connected with the mounting ring integrally.

[0009] As the improvement of the above technical scheme, the guide pipe one and the guide pipe two are both L-shaped structures.

[0010] As the improvement of the above technical scheme, the two sides of the head mold are further provided with ear parts, the central part of the ear part is provided with a sound sensor mounting hole for accommodating detection noise, and the two sides of the ear part are further provided with screw mounting holes.

[0011] The standard head mold is designed according to international standards ISO 16900-5:2016, ISO 16900-5:2018 (Amendment-1) and ISO / TS 16976-2:2015, can be used for detection of dead space and noise of medical respiratory protection products, and has reasonable structure design and simple and convenient installation and dismounting operation. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the standard head mold;

[0013] Figure 2 It is a connection schematic view of the trachea, the detection assembly and the support assembly;

[0014] Figure 3 It is a connection schematic view of the trachea and the detection assembly;

[0015] Figure 4 It is a structural schematic view of the detection assembly;

[0016] Figure 5 It is a cross-sectional schematic view of the detection assembly;

[0017] Figure 6 It is a structural schematic view of the ear part;

[0018] Figure 7 It is a schematic view of each type of head mold;

[0019] Figure 8 Typical size data graph for standard headform verification. DETAILED DESCRIPTION

[0020] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0021] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] Embodiment 1

[0024] As shown in Figures 1-5 The standard headform includes a headform 10, a support assembly 30 for supporting the headform 10, the inside of the headform 10 is provided with an air pipe 40, the upper end of the air pipe 40 is mounted at the mouth of the headform 10 and the upper end of the air pipe 40 communicates with the mouth of the headform 10, the upper part of the air pipe 40 is provided with a detection assembly 20, the detection assembly 20 is used to detect the air pressure, temperature and carbon dioxide content in the air pipe 40, the support assembly 30 includes an upper base 31, a lower base 32, a support leg 33 fixedly mounted at the lower end of the lower base 32, the upper end of the upper base 31 is provided with a positioning convex groove 311 matched with the bottom of the headform 10, the upper base 31 is threadedly connected with the lower base 32, the center of the upper base 31 and the lower base 32 is provided with a through hole I for the lower part of the air pipe 40 to pass through.

[0025] Embodiment 2

[0026] The detection assembly 20 comprises a mounting ring 21 sleeved on the upper part of the trachea 40, a temperature sensor for detecting the temperature in the trachea 40, a carbon dioxide sensor for detecting the carbon dioxide content in the trachea 40, and a pressure sensor for detecting the air pressure in the trachea 40. One side of the upper part of the trachea 40 is provided with a catheter 22 connected with the sensing end of the temperature sensor, and the end of the catheter 22 penetrates through the upper part of the trachea 40 and is located in the trachea 40. The other side of the upper part of the trachea 40 is provided with a catheter 23 connected with the sensing end of the carbon dioxide sensor, and the end of the catheter 23 penetrates through the upper part of the trachea 40 and is located in the trachea 40. A plurality of air holes are arranged on the outer periphery of the upper part of the trachea 40. The inner ring of the mounting ring 21 is provided with a first annular groove 213, the first annular groove 213 is sleeved outside the air holes, and the air holes are in communication with the first annular groove 213. The outer side of the mounting ring 21 is further provided with a threaded hole 216 for mounting the sensing end of the pressure sensor, and the threaded hole 216 is in communication with the first annular groove 213 through a through hole 217.

[0027] The air flow in the trachea 40 passes through the air holes, the first annular groove 213, the through hole 217, and the threaded hole 216, and is then detected by the sensing end of the pressure sensor. This design makes the pressure in the trachea 40 more accurately perceived with less error.

[0028] Dead space test

[0029] The head mold 10 is manufactured by using 3D printing technology, and the material is resin. The upper base 31 and the lower base 32 are made of aluminum alloy by machining, and the supporting leg 33 is made of 304 stainless steel by machining.

[0030] In use, the neck of the head mold 10 is inserted into the positioning groove 311 of the upper base 31, and is fixed by gap fit. The upper base 31 is threadedly connected with the lower base 32, facilitating installation and disassembly.

[0031] The temperature sensor, the carbon dioxide sensor, and the pressure sensor are all XD type temperature sensors, EL type carbon dioxide sensors, and YP type pressure sensors of Dongguan Xizhe Electronics Co., Ltd. Their specific installation methods and principles can be found in the corresponding product instruction manual.

[0032] In testing, the gas inhaled at the mouth of the head mold 10 passes through the trachea 40, and its temperature, air pressure, and carbon dioxide content are detected by the detection assembly 20.

[0033] Example 3

[0034] The head mold 10 has five models: small, short / wide, medium, long / narrow, and large. The sizes of each model meet the corresponding international standard requirements and can represent the face shape of Chinese people.

[0035] Manufacturing process uses 3D printing technology and resin material, with high reproducibility. The internal design is relatively hollow structure to reduce the weight of the head mold, the outer surface can be painted according to requirements, strong simulation.

[0036] Each type of standard head mold (see Figure 7 ), according to the face size data in ISO / TS 16976-2:2015, after processing, the typical part size of the head mold product is measured and compared with the data specified in the standard (see Figure 8 ), to verify whether it is a qualified head mold.

[0037] Example 4

[0038] The inner ring of the mounting ring 21 is also provided with a second annular groove 214 for accommodating a sealing ring, and the second annular groove 214 is provided with two, two second annular grooves 214 are located on both sides of the first annular groove 213.

[0039] By loading the sealing ring at the second annular groove 214, the sealing property between the mounting ring 21 and the air pipe 40 is improved.

[0040] Example 5

[0041] The first end of the mounting ring 21 is provided with two convex plates 211 arranged oppositely, and the end of the convex plate 211 is provided with an L-shaped clamping groove 212.

[0042] Two clamping grooves 212 are respectively fixed to the catheter one 22 and the catheter two 23, and are fixed by rotating clamping, so that the installation and disassembly operation is simple and convenient.

[0043] Example 6

[0044] For convenient installation, the inner side of the convex plate 211 is provided with an inclined arc surface 215, the thickness of the end of the convex plate 211 is less than the thickness of the first end of the convex plate 211, and the first end of the convex plate 211 is connected with the mounting ring 21 as a whole.

[0045] Example 7

[0046] For convenient lead installation, the catheter one 22 and the catheter two 23 are both L-shaped structures.

[0047] Example 8

[0048] Noise test

[0049] As Figure 6As shown, the head mold 10 is further provided with an ear part 50 on each side, and a screw mounting hole 51 is arranged on each side of the ear part 50.

[0050] The ear part 50 is mounted on each side of the head mold 10 by a screw through the screw mounting hole 51. A sound sensor is mounted at the sound sensor mounting hole 52 to detect noise. The sound sensor can be a ZJ noise sensor from Shenzhen Boyunchuang Environmental Technology Co., Ltd., and the specific mounting method and principle can be found in the corresponding "Product Instruction Manual".

[0051] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A standard headform comprising a headform (10), a support assembly (30) for supporting the headform (10), characterised in that: The head mold (10) is internally provided with an air pipe (40), the upper end of the air pipe (40) is mounted at the mouth of the head mold (10) and the upper end of the air pipe (40) is communicated with the mouth of the head mold (10), the upper part of the air pipe (40) is provided with a detection assembly (20), the supporting assembly (30) comprises an upper base (31), a lower base (32) and a supporting leg (33) fixedly mounted at the lower end of the lower base (32), the upper end of the upper base (31) is provided with a positioning convex groove (311) matched with the bottom of the head mold (10), the upper base (31) is threadedly connected with the lower base (32), and the central parts of the upper base (31) and the lower base (32) are provided with through holes I for the lower part of the air pipe (40) to pass through. The detection assembly (20) comprises a mounting ring (21) sleeved on the upper part of the air pipe (40), a temperature sensor for detecting the temperature in the air pipe (40), a carbon dioxide sensor for detecting the carbon dioxide content in the air pipe (40) and a pressure sensor for detecting the air pressure in the air pipe (40), one side of the upper part of the air pipe (40) is provided with a conduit I (22) connected with the sensing end of the temperature sensor, the tail end of the conduit I (22) penetrates through the upper part of the air pipe (40) and is located in the air pipe (40), the other side of the upper part of the air pipe (40) is provided with a conduit II (23) connected with the sensing end of the carbon dioxide sensor, the tail end of the conduit II (23) penetrates through the upper part of the air pipe (40) and is located in the air pipe (40), and the outer periphery of the upper part of the air pipe (40) is provided with a ring of air holes, the inner ring of the mounting ring (21) is provided with a first annular groove (213), the first annular groove (213) is sleeved on the outside of the air holes and the air holes are communicated with the first annular groove (213), and the outer side of the mounting ring (21) is further provided with a screw hole (216) for mounting the sensing end of the pressure sensor, and a through hole II (217) is arranged between the screw hole (216) and the first annular groove (213) to communicate. The inner ring of the mounting ring (21) is further provided with a second annular groove (214) for accommodating a sealing ring, and the second annular groove (214) is provided with two, and the two second annular grooves (214) are respectively located on the two sides of the first annular groove (213). The first end of the mounting ring (21) is provided with two oppositely arranged convex plates (211), and the tail end of the convex plate (211) is provided with an L-shaped clamping groove (212). The inner side of the convex plate (211) is provided with an inclined arc surface (215), the thickness of the tail end of the convex plate (211) is smaller than that of the first end of the convex plate (211), and the first end of the convex plate (211) is connected with the mounting ring (21) in an integrated manner. The two sides of the head mold (10) are further provided with ear parts (50), respectively, the central part of the ear part (50) is provided with a sound sensor mounting hole (52) for accommodating a detection noise, and the two sides of the ear part (50) are further provided with screw mounting holes (51).

2. The standard headform of claim 1, wherein: The conduit I (22) and the conduit II (23) are both L-shaped structures.

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