JP3141197B2 - Mounting structure of temperature sensor and boiling disinfector for contact lens using this - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric appliance having a heating section for heating an object, for example, an electric appliance such as a boiling disinfector for contact lenses, which is mounted for controlling the temperature of the heating section. The present invention relates to a temperature sensor mounting structure and a boiling disinfector for contact lenses using the mounting structure.

[0002]

2. Description of the Related Art In an electric appliance having a heating section, a temperature sensor is generally attached as part of controlling the temperature of the heating section. Conventionally, this temperature sensor is directly attached to a heating part whose temperature is controlled, and a wire is formed from this temperature sensor to a predetermined temperature control circuit provided on a control board or the like by a lead wire or the like.

[0003] For example, in the case of a contact lens boiling disinfecting device (hereinafter, a boiling device) for heating and boiling a contact lens together with a lens case, a plate-shaped heating section (hereinafter, a heating plate) for heating the lens case. 9), the heating plate, the shielding plate, and the control board are provided in this order in parallel inside the boiling device, as shown in FIGS. The shielding plate is for shielding the heat of the heating plate to protect the control substrate from the heat. The temperature sensor B is shown in FIGS.
As shown in (1), it is directly attached to the heating plate, and is held down by a holding plate screwed to the heating plate. A lead wire attached to the temperature sensor by soldering or caulking is guided to the control board, and is soldered to a predetermined through hole on the control board.

[0004]

In such a soldering operation, attention must be paid to the operation because a high-temperature soldering iron is used. Also, attention must be paid to this point because the finish such as the condition of the solder is good or bad. It is a tedious and time-consuming task.

[0005] During such a soldering operation, detailed manual operations such as routing of a lead wire and insertion into a through hole are accompanied. In addition, the lead wire is prepared longer for workability, and thus, after soldering, it is necessary to cut a surplus portion of the lead wire that penetrates behind the through hole with a nipper or the like.

[0006] In addition, during this cutting, the surplus portion may be scattered and fall into the device being assembled, and may remain in the finished product. As a result, this may cause a later failure. Or, some of the splatters splatter with considerable momentum depending on how they are cut,
When the surplus part vigorously hits the inside of the device or other parts,
If you do not feel good, you may hurt them,
This also affects the product quality, for example, as a cause of failure.

In view of the above problems, it is an object of the present invention to provide a heating unit, a temperature sensor for the heating unit,
In the mounting structure of the temperature sensor including the control board having the temperature control function of the heating unit, a lead wire connecting the temperature sensor and a predetermined circuit of the control board is omitted, and therefore, the work of soldering the lead wire is also omitted. An object of the present invention is to provide a temperature sensor mounting structure that is omitted and a boiling disinfector for contact lenses using the mounting structure.

[0008]

Therefore, according to the present invention, the temperature sensor, which was conventionally directly attached to the heating section, is directly attached to the control board, thereby eliminating the lead wire. did. Then, a part of the heating unit was directed to the temperature sensor mounted on the control board. That is, by assembling the control board and the heating section in a predetermined positional relationship, a predetermined location of the heating section may be directed to the temperature sensor on the control board. This eliminates the need for a lead wire and can also eliminate the soldering operation.

The invention according to claim 2 is one embodiment of the above means, in which a part of the heating unit is extended to form an extension, and the extension is directed to a temperature sensor on a control board. I made it. Thus, even if the control board is assembled at a distance from the heating unit, the temperature sensor on the control board reaches the extension part, which is a part of the heating unit, so that the temperature can be reliably inspected. Also, since the control board can be separated from the heating section by the length of the extension section, it is hardly affected by heat from the heating section,
A shielding plate can be interposed as in the case of the related art. In addition, since the extension part is extended, the temperature is lower than that of the heating part main body, and the temperature value of the heating part main body cannot be directly known, but by controlling in consideration of the temperature difference between the heating part main body and the extension part, In addition, temperature control can be performed accurately.

According to a third aspect of the present invention, a notch or a hole is provided in the control board, and a temperature sensor is mounted over the notch or hole. The notch is formed by cutting out the outer periphery of the control board, and the hole is formed by penetrating a hole in the control board. In other words, the temperature sensor is heated by the extension part and becomes high temperature. However, by bridging the temperature sensor over the notch or the like, the heated temperature sensor is isolated from the control board, and the control board is not heated unnecessarily. . In addition, if the extension is simply addressed to the temperature sensor, the extension may be misaligned or insufficiently pressed at the time of addressing. It is necessary to hold down and attach.
In this regard, by providing a notch or a hole in the control board, the temperature sensor can be attached to the extension with an auxiliary member such as a holding plate, that is, the notch or the hole serves as such a working space. It can be used.

On the other hand, when a boiling water disinfecting device for a contact lens is considered as a specific object of the above-mentioned means, a heating plate which is heated by being brought into contact with a PTC heater corresponds to a heating section constituting the above-mentioned means. Become. A conductor is used for the heating plate, and the heating plate is brought into contact with the PTC heater, and is connected to the control board by a lead wire from the heating plate, thereby forming a power supply path from the control board to the PTC heater. . Therefore, the invention according to claim 4 has been made in order to utilize the above-mentioned means for forming the power supply path, that is, a part of the heating section addressed to the temperature sensor is connected to the power supply terminal on the control board side. , A power supply path from the control board to the PTC heater is formed. Thereby, the lead wire can be further omitted.

In a preferred embodiment of the present invention, as a specific means, the power supply terminal also serves as a pressing plate for the temperature sensor on the heating plate.

[0013] The mounting structure of the temperature sensor is described in claim 6.
As described in (1), it can be used for a boiling disinfectant for contact lenses. As described in the above-mentioned prior art, a boiling disinfector for contact lenses is generally provided with a heating plate and a PTC.
The case where the heater, the shield plate, and the control board are provided in this order in parallel is incorporated in the case, but the distance between the heating plate (as a heating unit) and the control board is defined as the length of the extension part. This is because the structure is originally in an appropriate positional relationship and has an internal structure suitable for using the mounting structure.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment in which a temperature sensor mounting structure according to claims 1 to 5 is used in a boiling disinfectant for contact lenses will be described with reference to FIGS.

As shown in FIG. 1, the boiling device 100 has a small box shape made of plastic, has an upper lid 101 on the upper surface, and is provided on a hinge. When the upper lid 101 is opened, a storage section 102 having a size in which a lens case A of a contact lens can be placed is provided therein. In the small box-shaped main body case 103, the inner back surface 10 of the storage section 102 is provided.
4, the heating plate 10 is pressed, and the lens case A placed in the storage section 102 is heated together with the lens. Further, inside the main body case, the heating plate 10 is pressed against the bottom rear surface 104, and the PTC is placed under the heating plate 10.
The heater 20, the shielding plate 30, and the control board 40 are provided in parallel in this order.

First, the heating plate 10 and the control board 40 will be described with respect to the temperature sensor mounting structure of the first to third aspects.

The heating plate 10 is made of a metal conductor plate, and a PCT heater 20 is attached to the center of the lower surface thereof. One end of the heating plate 10 is extended in a strip shape, and
It is one. The extending portion 11 is bent at a right angle from the heating plate 10 and is extended to a length that penetrates through the shielding plate 30 and reaches the control board 40. The address 12 is provided. The destination portion 12 is provided with a screw hole 13, and the temperature sensor B is pressed against the destination portion 12 by a pressing plate 43 screwed here. The heating section need not be a plate-like heating plate as described above, and may have any shape. Also,
The heating unit may be heated by a heater or the like, or may generate heat by itself. In short, the heating unit includes anything that heats an object and requires temperature inspection. The shape of the extension is also free,
The heating plate is not limited to a part of which is bent. Further, the extension portion does not have to be integral with the heating unit, and another member may be attached to the heating unit.

The control board 40 is cut out at a position corresponding to the extension portion 11 to form a notch portion 44.
A cylindrical temperature sensor B made of a thermistor is bridged over 4 and is directly soldered to through holes located at both ends of the temperature sensor B. Further, the control board 40 is combined so that the mounting surface of the electronic components is on the opposite side of the heating plate 10, so that the temperature sensor B is also mounted on the opposite side of the heating plate 10. The extension portion 11 extended from the heating plate 10 has a distal end portion 12 extending into the cutout portion 44 of the control board 40, and the temperature sensor B mounted on the opposite side to the heating plate 10 The address portion 12 is addressed through the notch 44. At this time, although the destination 12 and the mounting surface of the control board 40 are almost flush,
2 is projected so that the temperature sensor B bridged over the cutout portion 44 can be reliably addressed. Further, a strip-shaped copper plate is covered as a pressing plate 43 crosswise over the temperature sensor B, so that it is not only addressed but also pressed. The pressing plate 43 has a claw 43b at one end thereof which is engaged with a cut 45 of the control board.
The other end 43a is screwed into the screw hole 13 of the destination portion 12, and the concave portion provided on the holding plate 43 holds the temperature sensor B so as to hold the temperature sensor to the destination portion. The pressing plate 43 also serves as a configuration of a second connecting portion described later, thereby constituting the invention according to claims 4 and 5. The control board 40 has a first power supply terminal 41 and a second power supply terminal 42 on its shield plate side.
It is provided in a square shape of about mm square, and is used for mounting a heater described later.

Next, with respect to the mounting of the PTC heater 20, the shield plate 30 and the PTC heater 20 will be described, and first and second connection portions forming a forward path and a return path as a power supply circuit to the PTC heater 20 will be described.

The shielding plate 30 is made of heat-resistant plastic, and has a circular concave portion 31 for accommodating the PTC heater in the center of the upper surface thereof as shown in FIG.
Put the PTC heater 20 in the heating plate 1
0 is placed on the bottom rear surface 104 of the storage section 102 so as to be placed on the bottom. At this time, at the bottom of the concave portion 31, as shown in FIGS. 6 to 8, a mountain spring 50 as a first leaf spring and an L-shaped spring 60 as a second leaf spring are provided. Yamagata spring 50
Is formed by bending a belt-like stainless plate in a mountain fold in the middle of the belt shape, and locking only the other end 52 side to the first locking groove 32 at the bottom of the concave portion so that one end becomes the free end 51. is there. The L-shaped spring 60 is bent in an L-shape in the middle of the band-shaped phosphor bronze plate. The L-shaped spring 60 has one end 61 engaged with the second engagement groove 33 at the bottom of the concave portion and positioned so as to be laid under the free end 51. The insertion groove 34 provided at the bottom of the concave portion 31 is loosely inserted and protrudes toward the control board, thereby forming a contact portion 63 to contact the first power supply terminal 41 provided on the control board. are doing.

The PTC heater 20 is made of a barium titanate semiconductor formed in a size of a coin. A conductive layer of silver or aluminum is formed on the front and back of the ceramic plate to form a first terminal surface 21 and a second terminal. A surface 22 is formed so as to generate heat when the terminal surfaces 21 and 22 are energized.

The first connection part is formed as follows.
First, as described above, the PTC heater 20 is connected to the shielding plate 3.
When it is stored in the concave portion 31 of the PTC heater 20, the top portion 53 of the spring 50 is pressed against the first terminal face 21 of the PTC heater 20.
The chevron spring 50 is also in contact with an L-shaped spring 60 underlaying the L-shaped spring 60, and the L-shaped spring 60 protrudes toward the lower surface side of the shielding plate 30 (that is, on the control board side), and the contact portion 62 is the first contact portion. Of the first terminal surface 2
A first connection portion is formed between 1 and the first power supply terminal 41.

The second connecting portion will be described below, which also serves as the explanation of the fourth and fifth aspects of the present invention. The heating plate 10
PTC heater 20 housed in recess 31 as described above
On top of. Therefore, the PTC heater 20 is urged by the angle spring 50 and pressed against the lower surface of the heating plate 10,
As a result, it is heated by the heater. At this time, the second terminal surface 22 and the heating plate 10 are electrically connected by pressing the PTC heater 20 against the heating plate 10.
As a result, the electrical connection to the control board 40 is made, so that a second connection portion is formed between the second terminal surface 22 and the second power supply terminal 42 as a result. That is, the extension 1
As described above, 1 is directed to the temperature sensor mounted on the control board at the distal end, and at this time, the temperature sensor is pressed to the destination via the holding plate 43. And
The other end 43 b of the holding plate 43 locked to the cut 45 of the control board is connected to the first power supply terminal 42.

As described above, the mounting structure of the temperature sensor plays a part of the mounting structure of the heater, and the lead wire to the temperature sensor and the lead wire to the PTC heater, which are conventionally used, are omitted. Therefore, the lead wire is wiped out of the inside of the boiling disinfector for contact lenses.

[0025]

As described above, according to the first aspect of the present invention, the lead wire conventionally wired between the temperature sensor on the heating unit side and the control board is omitted, and as a result, this lead wire Since the soldering operation to be performed is also omitted, workability is improved, the number of components is reduced, and the structure of a target electric appliance or the like can be simplified.

According to the second aspect of the present invention, the temperature sensor mounting structure of the first aspect can be embodied, and the accuracy of the temperature inspection can be maintained as before. By providing the extension, it is not necessary to change the conventional positional relationship between the heating unit and the control board, and therefore, the introduction to the conventional product is facilitated.

According to the third aspect of the present invention, since the temperature sensor to be heated is bridged over the notch or the like, damage to the control board due to temperature can be avoided. Also,
Since the control board near the temperature sensor has also been removed, the convenience of securely attaching the temperature sensor to the extension using a holding plate or other method is obtained,
Therefore, it is possible to prevent misalignment of the extension to the temperature sensor and insufficient pressing during the addressing.

According to the fourth and fifth aspects of the present invention, the structure for mounting the temperature sensor also serves as a power supply path to the PTC heater, so that the structure can be simplified.

Therefore, the same effect can be obtained by the contact lens boiling disinfectant according to the sixth aspect of the present invention, which is provided with the mounting structure having these effects.

[Brief description of the drawings]

FIG. 1 is a perspective view of a boiling disinfectant for contact lenses shown in an embodiment.

FIG. 2 is a perspective view of a mounting structure of the temperature sensor shown in the embodiment.

FIG. 3 is an exploded view of the mounting structure of the temperature sensor shown in FIG.

FIG. 4 is a side view of the temperature sensor mounting structure shown in FIG. 2 from which a shielding plate is omitted.

FIG. 5 is a front view of the temperature sensor mounting structure shown in FIG. 2 with a shield plate cut away.

FIG. 6 is an exploded perspective view of a heater mounting structure used in the contact lens boiling disinfector of FIG. 1;

FIG. 7 is a diagram illustrating a mounting structure of a heater used in the contact lens boiling disinfecting device of FIG. 1, and is a cross-sectional view illustrating the inside of a main body case in which an upper lid is omitted. Inside the main body case, the heating plate 10 is pressed against the bottom rear surface 104 of the storage portion 102, and the heating plate 10
Below, a PTC heater 20, a shielding plate 30 (a concave portion is omitted), and a control board 40 are sequentially arranged in a state of being arranged in a downward direction, and a chevron spring controls the PTC heater by heating the heating plate. And its free end 51
Draws the spring action of the L-shaped spring by making the L-shaped spring beneath.

FIG. 8 is a diagram for explaining a first connection portion;
The concave portion provided on the upper surface of the shielding plate and the chevron spring and the L-shaped spring locked here are shown in an exploded manner.

FIG. 9 is an exploded view of a heating plate, a shielding plate, and a control board incorporated in a conventional boiling disinfecting device for a contact lens.

FIG. 10 is a diagram showing how a temperature sensor is attached in the combination of the heating plate, the shielding plate, and the control board shown in FIG. 9, and both ends of the temperature sensor are attached to the shielding plate. At the same time, an intermediate portion of the temperature sensor is attached by pressing against the heating plate, and lead wires are wired from both ends of the temperature sensor to the control board.

FIG. 11 is a diagram showing the temperature sensor shown in FIG. 10 from another angle.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Boiler disinfecting device for contact lens 102 Storage section B Temperature sensor 10 Heating plate 11 Extension section 20 PTC heater 30 Shielding plate 31 Depression 40 Control board 41 First power supply terminal 42 Second power supply terminal 50 As first leaf spring Angle spring 60 L-shaped spring as second leaf spring

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-7-289797 (JP, A) JP-A-57-170256 (JP, A) JP-A-3-30768 (JP, A) JP-A-4- 250414 (JP, A) Fully open 1986-177636 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61L 2/04 G02C 13/00 H05B 3/00 310

Claims (6)

(57) [Claims] A heating unit, a temperature sensor for the heating unit, a control board having a temperature control function for the heating unit,
And mounting the temperature sensor on the control board and assembling the control board and the heating unit in a predetermined positional relationship.
Mounting structure for a temperature sensor, characterized in that the inspection of the temperature is performed by our addressed some of the heating unit to the temperature sensor by. 2. The temperature sensor mounting structure according to claim 1, wherein a part of the heating section is an extension formed to extend from the heating section. 3. The mounting structure for a temperature sensor according to claim 1, wherein the temperature sensor is mounted so as to span a notch or a hole provided in the control board. 4. The heating section is made of a conductor that is heated by being brought into contact with a PTC heater, and a part of the heating section addressed to a temperature sensor is connected to a power supply terminal on the control board side. By also serving
The mounting structure of the temperature sensor according to claim 1, wherein a power supply path from the power supply terminal to the PTC heater is formed. 5. The temperature sensor mounting structure according to claim 4, wherein the power supply terminal is also used as a pressing plate for the temperature sensor on the heating plate. 6. A boiling disinfector for contact lenses, comprising a temperature sensor mounting structure according to claim 1. Description: