CN1987378A - Improved structure of electronic thermometer - Google Patents

Abstract

The invention discloses an improved structure of an electronic thermometer, which comprises an electronic thermometer body, a temperature sensing head, a movement and the like, wherein the movement comprises a temperature display screen, a printed circuit board with electric contacts and a conductive particle fixing support column arranged adjacent to the printed circuit board, the conductive particle fixing support column is a flexible body, conductive particles opposite to the electric contacts are fixed on the conductive particle fixing support column, one end of the conductive particle fixing support column is fixed on the movement, the other end of the conductive particle fixing support column is a free end, a press switch which can be in contact with the conductive particle fixing support column and applies acting force to the conductive particle fixing support column is also arranged in the length direction of the conductive particle fixing support column, the press switch is positioned at the rear end part of the electronic thermometer body, and the press direction of the press switch is basically consistent with the. The switch key of the invention adopts a longitudinal pressing mode, is more suitable for measuring the habituation of occasions such as oral cavities and the like, can meet the use requirements of some special occasions, and has simple structure and processing technology, low improvement cost and high reliability.

Description

Improved Structure of Electronic Thermometer

technical field

The invention relates to an electronic thermometer for measuring body temperature or other occasions and articles, in particular to the improvement of the switch structure of the electronic thermometer.

Background technique

The general thermometer is to use a mercury rod thermometer, and as the name implies, the thermometer uses the principle of mercury's heat expansion and contraction to achieve the effect of measuring body temperature, but it is a very dangerous thermometer because it is made of glass, so Special attention must also be paid to the use, if the mercury thermometer is accidentally bumped, it is likely to break it, and the mercury flowing out will cause injury to the user, especially when it is used for rectal temperature or oral temperature; and if it is for For patients who need to monitor their body temperature for a long time, the mercury rod thermometer cannot make the patient comfortable and can measure body temperature at any time. It is really necessary to develop a body temperature monitor that meets the above needs.

In recent years, there are electronic thermometers that can be used to measure the body temperature of the human body, but their waterproof function is poor. In addition, the switch buttons are pressed horizontally, which does not meet the habit of measuring oral cavity and other occasions, and cannot meet the needs of some special occasions. Japanese Patent Application Laid-Open No. 61-191928 discloses a switch button structure of an electronic thermometer. The structure is roughly as follows: a sealing body is provided in the cover at the end of the body of the electronic thermometer, and the top end of the sealing body is integrally and liquid-tightly designed. There is a flexible sheet made of soft synthetic resin, above which there is a movable push switch, which is located in the switch hole at the center of the end face of the cover body, and its top protrudes out of the switch hole. The bottom has a contact portion, which is always in contact with the flexible sheet through the end surface, and an "O"-shaped sealing ring is arranged between the push switch and the inner surface of the switch hole. There is a switch trigger mechanism under the flexible sheet, the switch trigger mechanism includes a plastic base, a metal switch elastic piece is fixed on the base, the top of the switch elastic piece is always in contact with the bottom surface of the flexible sheet, and the top of the base is provided with a The contact piece corresponding to the switch shrapnel, the switch shrapnel and the contact piece are respectively connected to the two poles of the circuit. When the push switch is subjected to an external force, the push switch moves down and presses the flexible sheet to produce flexible deformation, and the flexible sheet then presses the switch spring below it to make it elastically bend until its end The contacts touch the contacts on the substrate, thereby connecting the circuit, and the electronic thermometer starts to work.

Although the switch button of the above structure can be pressed longitudinally from the tail end of the electronic thermometer, its switch trigger mechanism adopts the structure of metal shrapnel, which has many shortcomings, mainly in: 1) because the switch trigger mechanism It includes at least the plastic matrix and metal shrapnel, which cannot be formed at one time. In addition, the metal shrapnel needs to be bent and attached to the metal shrapnel and the plastic matrix. The structure and process are complicated, and the probability of producing defective products is high; 2) For the current As far as electronic thermometers are widely used, there is a big difference in the internal structure, and its improvement cost is high, which cannot meet the needs of the industry; 3) The metal shrapnel structure is prone to elastic failure after repeated bending deformation, and Lead to the failure of the switch, and the reliability is poor. To sum up, the closest existing technology still has many deficiencies, and there is still a large room for improvement, which needs to be improved urgently.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an improved structure of the electronic thermometer, the pressing mode of the switch button is longitudinal pressing, which is more in line with the habit of measuring mouth and other occasions, and can meet some special needs. The needs of occasions, and simple structure and processing technology, low cost of improvement, high reliability.

For this reason, the present invention provides an improved structure of an electronic thermometer, comprising an electronic thermometer body, a temperature sensing head positioned at the front end of the body, a movement inside the body, the movement comprising a temperature display screen, a printed circuit board with electrical contacts And the conductive particle fixing pillar arranged adjacent to the printed circuit board, the conductive particle fixing pillar is a flexible body, and the conductive particle opposite to the electrical contact is fixed on it, and one end of the conductive particle fixing pillar is fixed on the On the movement, the other end is a free end, and a push switch that can be in contact with it and apply force to it is also provided in the length direction of the conductive particle fixed pillar. The push switch is located at the rear end of the electronic thermometer body. The pressing direction is basically consistent with or forms an acute angle with the length direction of the thermometer body.

The end faces of the adjacent ends between the push switch and the conductive particle fixed pillar can be inclined, and the two end faces form surface contact when contacting; The terminals form a line contact or a point contact when they touch. In this way, the pressing force from the longitudinal direction can generate a lateral component force, causing the flexible conductive particle fixing pillar to produce a lateral flexible bending deformation, thereby driving the conductive particle on it to contact the electrical contact on the printed circuit board.

The rear end of the electronic thermometer body can be a cover that can be separated from the middle part of the body, and the push switch is located on the cover and arranged along the central axis of the cover or deviated from the central axis; The push switch is a flexible button.

The rear end of the electronic thermometer body can also be integrally formed with the middle part, and the push switch is a rigid button column, which passes through the through hole of a partition in the thermometer body and the hole of the conductive grain fixing support. The free ends are opposite and form a mutual contact arrangement; reset elements such as springs are arranged between the button post and the partition.

The temperature sensing head and the body of the electronic thermometer can be of an integrated structure, and the temperature sensing head is a bendable flexible structure, which can greatly facilitate the use of patients, especially children, the elderly, the weak, the sick, and the disabled.

The present invention increases the depth of immersion in the liquid by increasing the distance between the switch button and the measuring end, without investing too much cost in the waterproof treatment of the switch button; and changes the pressing method of the switch button to longitudinal pressing , which is more in line with the habit of measuring mouth and other occasions, and can also meet the needs of some special occasions. At the same time, because the position of the switch button is moved to the end, the appearance of the electronic thermometer is smoother, and it will be more convenient in structural design and production practice. More importantly: (1) Pressing the switch directly presses the flexible body, causing it to bend and deform, and drives the conductive particles on it to contact the electrical contacts of the printed circuit board. Obviously, there is no need to use it that is prone to elasticity Failed metal shrapnel, therefore, the reliability is stronger, and the service life of the electronic thermometer has been extended; (2) The improvement of the above functions can be realized without making too many changes to the internal structure of the existing electronic thermometer , the improvement cost is low, and can better meet the needs of the industry; (3) avoiding bending and attachment processes, the structure and processing are simpler, the manufacturing cost is saved, and the production efficiency is also greatly improved.

Description of drawings

Fig. 1 is a schematic diagram of an exploded structure of a first embodiment of the present invention;

Figure 2 is a schematic view of the front appearance of the first embodiment of the present invention;

Fig. 3 is a schematic view of the side appearance of the first embodiment of the present invention;

Fig. 4 is A-A sectional view of Fig. 2;

Figure 5 is a partially enlarged view of Figure 4;

Fig. 6 is a schematic diagram of an exploded structure of a second embodiment of the present invention;

Fig. 7 is a schematic view of the front appearance of the second embodiment of the present invention;

Fig. 8 is a schematic side view of the second embodiment of the present invention;

Fig. 9 is a B-B sectional view of Fig. 7;

Figure 10 is a partially enlarged view of Figure 9;

Fig. 11 is a schematic diagram of an exploded structure of a third embodiment of the present invention;

Fig. 12 is a schematic view of the front appearance of the third embodiment of the present invention;

Fig. 13 is a schematic side view of the third embodiment of the present invention;

Fig. 14 is a schematic diagram of the rear appearance of the third embodiment of the present invention;

Fig. 15 is a C-C sectional view of Fig. 12;

FIG. 16 is a partially enlarged view of FIG. 15 .

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

1 to 5 show the first embodiment of the improved structure of the electronic thermometer of the present invention, the structure includes a thermometer body 1 with an elongated detection portion, the body is usually a hollow body integrally formed by plastics, in the The front end of the slender detection part is provided with a temperature sensing head 2 for sensing and measuring temperature, which is usually made of a good thermal conductivity material (such as metal); the rear end of the thermometer body is a cover that can be separated from the middle part of the body body 3, the cover body is provided with a switch button 4, and a thermometer body is provided with a temperature display 51 (usually an LCD display) for displaying the temperature measured by the temperature sensing head 2, a printed circuit board 52 and its upper surface. The movement 5 of the electric contact 53, the surface of the thermometer body 1 is corresponding to the temperature display screen 51, and the cover body 3 is respectively provided with a window gap 6 and a button hole corresponding to the switch button 4, and the thermometer body around the window gap 6 1. There is a groove 7 on the surface, and a transparent window plate 8 is attached (ultrasonic bonding method) to the groove 7 and covers the window gap 6. Through the transparent window plate 8, it can be observed The temperature display 51 thereafter. In the temperature sensing head 2 at the front end of the thermometer body 1, a temperature sensor 9 and an induction line 10 are arranged in a known manner, and the two ends of the induction line 10 are respectively connected to the temperature sensor 9 and the printed circuit board 52 of the movement 5.

The rear part of the thermometer body 1 has an open end 11 through which the movement 5 is inserted into the thermometer body 1 , and the open end 11 can be closed by the cover body 3 . Movement 5 is made of movement substrate 12, temperature display screen 51 fixed on the substrate, printed circuit board 52, conductive particle 13 and conductive particle fixed pillar 14 etc., conductive particle 13 is used for printed circuit board 52 and battery conduction to start the temperature measurement program. The conductive particle fixed pillar is a flexible part. The operator indirectly presses the conductive particle fixed pillar by pressing the switch button 4 on the cover body 3. The conductive particle fixed pillar flexibly bends under the action of the switch button 4, driving the fixed The conductive particles on it move toward the direction of the printed circuit board, and make electrical contact with the electrical contacts on the printed circuit board, so that the printed circuit board 52 is connected to the battery.

The switch button 4 on the cover body 3 is a flexible button body, which is located on one side of the conductive particle fixing support 14 along the length direction of the thermometer. The conductive particle fixing pillar 14 is also a flexible member, which is arranged opposite to the switch button 4 through an inclined surface and forms a mutually contactable arrangement. In this way, when the switch button 4 is pressed, it will generate an axial force or an axial force component to the conductive particle fixed pillar 14. Dislocation occurs, and the conductive particle fixing pillar 14 flexibly bends and deforms toward the direction of the printed circuit board 52, and at the same time drives the conductive particle 13 to move toward the direction of the printed circuit board 52, and makes the conductive particle 13 contact with the electrical contact on the printed circuit board.

Figures 6 to 10 show the second embodiment of the improved structure of the electronic thermometer of the present invention. The main difference between this embodiment and the previous embodiment is that in this embodiment, the switch button is located at the top of the cover. That is, it is exactly on the central axis of the entire thermometer. The conductive particle fixing pillars inside the thermometer body are also correspondingly arranged closer to the central axis of the thermometer, so as to be opposite to the switch keys; similarly, they are arranged oppositely through inclined surfaces and form a mutually contactable arrangement. Other structures and working methods are basically the same as those in the previous embodiment, so the description will not be repeated here.

Figures 11 to 16 show the third embodiment of the improved structure of the electronic thermometer of the present invention. The middle part and the rear end of the thermometer body in this embodiment are integrally formed, that is, there is no such structure as in the above two embodiments. The detachable cover body of the thermometer body is provided with a rigid button column 15 at the end of the thermometer body. The button column passes through the through hole of a partition plate 16 in the thermometer body and is opposite to the conductive particle fixing pillar 14 and forms a mutually contactable setting. A reset element 17 such as a spring is arranged between the button column 15 and the partition 16, so that the button column 15 can return to the position before pressing after the button column 15 is released.

In the above three embodiments, the body of the thermometer and the temperature sensing head at its front end can also be integrally formed without any seams, and the temperature sensor is hidden inside the temperature sensing head, directly passed through the plastic material. It is molded into one body with the body of the electronic thermometer. The temperature sensing head has a flexible structure and can be bent, which can greatly facilitate the use of patients, especially children, the elderly, the weak, the sick and the disabled.

The present invention is not limited to the above-mentioned embodiments, regardless of any changes in its shape or structure, any electronic thermometer with a push switch located at the rear end of the electronic thermometer body, and its pressing direction is basically consistent with the length direction of the thermometer body or forms an acute angle. All fall within the protection scope of the present invention. For the end face shape of the adjacent end between the push switch and the conductive particle fixed pillar, in addition to the situation that it is a slope in the above-mentioned embodiment, it can also be set as a slope or a curved surface on only one of the end faces, while the other end face can be It is set as a plane or other shape surface, and the surface forms a line contact with the slope through a corner; in addition, one end surface can also be set as a slope or a curved surface, and the other end can be set as a pointed cone, so as to form a point contact. The above deformations can achieve the flexible bending of the conductive particle fixed pillar under the action of the switch key, and drive the conductive particle fixed on it to move toward the direction of the printed circuit board, and generate electricity with the electrical contacts on the printed circuit board. purpose of contact.

Claims (10)

1. An improved structure of an electronic thermometer, comprising an electronic thermometer body, a temperature sensing head positioned at the front end of the body, a movement inside the body, the movement comprising a temperature display, a printed circuit board with electrical contacts, and a printed circuit board Adjacent to the conductive particle fixed pillar, the conductive particle fixed pillar is a flexible body, and the conductive particle opposite to the electrical contact is fixed on it. It is characterized in that: one end of the conductive particle fixed pillar is fixed on the machine. On the core, the other end is a free end, and there is also a push switch that can be in contact with it and apply a force to it in the length direction of the conductive particle fixed pillar. The push switch is located at the rear end of the electronic thermometer body. The pressing direction is basically consistent with or forms an acute angle with the length direction of the thermometer body. 2. The improved structure of the electronic thermometer according to claim 1, characterized in that: the end faces of the adjacent ends between the push switch and the conductive particle fixing support are inclined, and the two end faces form surface contact when contacting. 3. The improved structure of the electronic thermometer according to claim 1, characterized in that: one of the end surfaces of the adjacent ends between the push switch and the conductive particle fixed pillar is a slope or a curved surface, and the two adjacent ends form when they contact each other. line contact. 4. The improved structure of the electronic thermometer according to claim 1, characterized in that: one of the end surfaces of the adjacent ends between the push switch and the conductive particle fixed pillar is a slope or a curved surface, and the two adjacent ends form when they contact each other. touch. 5. The improved structure of the electronic thermometer according to any one of claims 1 to 4, characterized in that: the rear end of the electronic thermometer body is a cover that can be separated from the middle part of the body, and the push switch It is located on the cover and arranged along the central axis of the cover or deviated from the central axis. 6. The improved structure of the electronic thermometer according to claim 5, wherein the push switch is a flexible key. 7. The improved structure of the electronic thermometer according to any one of claims 1 to 4, characterized in that: the rear end part and the middle part of the electronic thermometer body are integrally formed. 8. The improved structure of the electronic thermometer according to claim 7, characterized in that: the push switch is a rigid button column, and the button column passes through the through hole of a partition in the thermometer body and the free space between the conductive particle fixed pillar. The ends are opposite and form a mutual contact arrangement; a reset element is provided between the button column and the partition. 9. The improved structure of the electronic thermometer according to claim 8, characterized in that: the reset element is a spring. 10. The improved structure of the electronic thermometer according to claim 1, characterized in that: the temperature sensing head is integrated with the body of the electronic thermometer, and the temperature sensing head is a bendable and flexible structure.

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