JPH0529064Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a micromixer in which a microplate in which a reagent solution is poured into a number of holes is placed and the reagent solution is agitated by shaking.

[Conventional technology]

As a micro mixer of this kind, the
Those described in Japanese Patent Application Laid-open No. 1952-25857 and Japanese Patent Application Laid-open No. 195275-1988 are known. Jitsukō 61-
In the micro mixer described in Publication No. 25857, a motor is installed in a case, and four flexible piano wires are erected from the case, and the four corners of a diaphragm are tied to the upper ends of the piano wires. . The diaphragm is connected to the rotating shaft of the motor with a bearing and an eccentric member interposed therebetween. A tray on which a microplate is placed is fixedly mounted on the diaphragm.
When the motor is driven, since the diaphragm is installed eccentrically with respect to the rotation axis of the motor due to the interposition of an eccentric member, the diaphragm vibrates in accordance with the amount of eccentricity, and accordingly, the diaphragm The reagent solution injected into each hole of the microplate is stirred by a shaking action from the diaphragm via the tray. The bottom of the case has rubber seats at the four corners, and the case is placed on a table or the like via the rubber seats.

On the other hand, the micro mixer described in Japanese Patent Application Laid-Open No. 62-195275 has a motor fixedly mounted on a mounting plate installed horizontally in the case, and a rotary disk rotatably supported on the mounting plate. The rotating shaft and rotating disk are connected by a belt. The rotating disk has a transmission shaft whose eccentric position can be freely varied, and the receiving tray is connected to the transmission shaft through a bearing. The four corners of the tray have magnets rotatably supported, and the magnets are slidably attracted to a support disk rotatably supported by the mounting plate by their magnetic force. When the motor is driven, the rotating disk rotates via the belt. Since the transmission shaft is located eccentrically with respect to the axis of the rotating disk,
The tray vibrates in accordance with the amount of eccentricity, and the reagent solution in each hole of the microplate placed on the tray is shaken and stirred. The case is placed on a table or the like using rubber seats at the four corners.

[The problem that the idea attempts to solve]

However, in any of the above micromixers, a motor is fixed to a case or a mounting plate that is integrated with the case, and the rotation of the motor is converted into vibration by an eccentric member or a transmission shaft located at an eccentric position to shake the microplate. Therefore, this vibration propagates to the motor and then to the case, and the vibration of the case is absorbed by the rubber seat used to place it on a table, etc., and the vibration that is not absorbed by the rubber seat is transmitted to the case against the table, etc. It is consumed as a force that causes the whole body to vibrate and move carelessly. Not only is it undesirable for the entire case to be moved carelessly on the top surface of the table, etc. on which it is placed, but the vibration force that originally shakes the microplate is weakened accordingly, and the rotational force of the motor is The shaking force of the microplate is not efficient and is wasteful. On the other hand, in order to reduce the vibration of the case, the thickness of the case itself has been increased to make it more rigid, but even with this rigidity, the vibration of the case cannot be sufficiently reduced to the desired degree, and the entire device is large. This increases the weight, which not only makes it inconvenient to transport and use, but also makes it expensive.

Therefore, in view of the above circumstances, the present invention is small in size, has a particularly low height, can efficiently vibrate the saucer with the rotational force of the motor, and drastically reduces unnecessary vibrations of the case, so that the case is less likely to vibrate than the table. An object of the present invention is to provide a micro mixer that can effectively prevent scratches when moving on the upper surface of the mixer.

[Means and actions to solve the problem]

In order to achieve the above object, this invention has a catch seat made of an adhesive synthetic resin sheet attached to the bottom of a case over as large an area as possible, and a catch tray is attached to the case with flexible support legs at the four corners. A motor is fixed to the case, and a weight that rotates at a specified diameter is attached to the motor's rotating shaft via a rod. When the motor is driven, the weight rotates around the rotating shaft, and the motor itself vibrates due to the imbalance of the weight with respect to the axis of the rotating shaft, and since the motor is fixed to the catch tray, the catch tray also vibrates. The catch tray is supported by flexible support legs on the case and vibrates when the motor is driven. The case is used by placing the catch seat attached to the bottom of the case in close contact with the top surface of a table or the like.

〔Example〕

Hereinafter, one embodiment of the micromixer according to the present invention will be described based on the drawings. In FIGS. 1 and 3, 1 is a case. The case 1 has rising peripheral walls 1a and 1b on the periphery, and in particular, the rising peripheral wall 1a on the front side is connected to the other rising peripheral walls 1.
The height is set higher than b. A controller 2 is mounted on the back side of the front rising peripheral wall 1a, and a controller 2 is mounted so that the power switch 3 and frequency adjustment knob 4 of the controller 2 can be operated from the outside and protrude from the front side of the front rising peripheral wall 1a. I have it. The controller 2 is connected to a commercial power source via a cord. Case 1
A cap 5 having an outer shape matching the shape of the rising peripheral walls 1a and 1b is attached to the cap 5 and fixed with screws. A concave support plate 6 is integrally fixed to the inner surface of the cap 5 by welding. Flexible support legs 7 are provided at the four corners of the support plate 6.
It is secured with a screw. As the support leg 7, a soft rubber material or a foam-like material with bubbles, which does not easily transmit vibrations to the support plate 6, can be used. Each support leg 7 projects above the cap 5 from an insertion hole 8 formed in the cap 5. The diameter of the insertion hole 8 is set to such an extent that the support leg 7 cannot come into contact with the edge of the insertion hole 8 even if the support leg 7 itself is deflected due to vibration. Each support leg 7
A saucer 9 is screwed to the upper end of the plate. The saucer 9 is arranged above the cap 5. A motor 11 is screwed to the lower surface of the center of the saucer 9 via a spacer 10.
It is also possible to directly fix the motor 11 with screws without intervening. The cap 5 and the support plate 6 are provided with escape holes 12 and 13 for escaping the motor 11 fixed to the saucer 9. Motor 1
1 uses a low-height one, and the rotation speed can be varied via the controller 2 by operating the frequency adjustment knob 4, and a rotating shaft 14 extends downward from the bottom surface of the controller 2. It is prominent. A proximal end of a rod 15 is fixed to the rotating shaft 14 and extends in a direction perpendicular to the axis thereof. A weight 16 is attached to the rod 15 so as to be movable, that is, to be variable in distance in a direction orthogonal to the axis of the rotating shaft 14. In this case, the weight 16 is fixed to the rod 15 with a screw, and can be moved on the rod 15 by loosening the screw. The catch seat 17 is attached to the lower surface of the case 1 as wide as possible. The catch plate 17 is made of a sticky synthetic resin sheet, and when the case 1 is placed on the top surface of a table or the like during use, it comes into close contact with the top surface of the table, etc., and its adhesive strength prevents the vibration of the catch plate 9. This is transmitted to the case 1 to prevent the case 1 from inadvertently moving on the upper surface of the table or the like. Also catch seat 17
has rising peripheral edges 9a and 9b on the front and rear edges, and a substantially W-shaped presser plate spring 19 is screwed to the inner surface of the rising peripheral wall 9b on the rear end side. The microplate 20 is placed on the tray 9, and the microplate 20 is held between the rising peripheral wall 9a of the front edge by the elastic force of the presser plate spring 19. The microplate 20 is
This device has been widely used in the past, and has a large number of holes 21 on the top surface, into which a reagent solution to be stirred is poured.

The micro mixer having the above configuration is installed on the upper surface of a table or the like via a catch 17. On saucer 9,
A microplate 20 filled with a reagent solution to be stirred is placed in the hole 21 . Depending on the stirring conditions such as the properties of the test solution injected into the hole 21,
There are cases where it is necessary to change the frequency of vibration per unit time, and in such cases, the frequency adjustment knob 4 is operated to adjust to the optimum value. Also, depending on the stirring conditions, when it becomes necessary to adjust the amount of vibration, the weight 16 is moved along the rod 15.
By selecting the distance from the rotating shaft 14 in the direction orthogonal to the axis, the distance can be adjusted to an optimal value. The saucer 9 is supported by the support leg 7 and vibrates, but the vibration is absorbed by the flexibility of the support leg 7. The microplate 20 placed on the tray 9 rises due to the elastic force of the presser plate spring 19 and is fixed between it and the peripheral wall 9a. Next, when the power switch 3 is turned on, the motor 11 is turned on.
is driven, and the rotating shaft 14 of the motor 11 rotates. Therefore, the weight 16 rotates around the rotating shaft 14. Therefore, the existence of the weight 16 causes a weight imbalance to act on the motor 11, and vibrations corresponding to the number of rotations of the weight 16 are generated. Since the motor 11 is fixed to the tray 9, the vibration generated in the motor 11 is transmitted to the tray 9, causing the tray 9 to vibrate. When the tray 9 vibrates, the microplate 20 also vibrates, and the supporting legs 7 prevent the case 1 from vibrating. It is desirable that all the vibrations of the saucer 9 be absorbed by the supporting legs 7 and not transmitted to the case 1, but it cannot be said that all the vibrations are absorbed and not transmitted to the case 1. communicated. Even if vibrations are transmitted to the case 1, since the catch seat 17 has a wide area and is in close contact with the table, etc., the vibrations transmitted to the case 1 can prevent the upper surface of the table, etc. from being inadvertently moved. obtain. Therefore, it is preferable that the support leg 7 be made of a material that can prevent the vibration of the saucer 9 from being transmitted to the case 1 as much as possible.

[Effect of idea]

As described above, according to the micro mixer according to the present invention, the motor directly vibrates the tray, the supporting legs prevent transmission of vibration from the tray to the case, and the tray allows the case to come into close contact with the top surface of the table, etc. Therefore, unlike conventional cases, there is no need to provide rigidity to prevent the case from moving accidentally on the top surface of a table, etc., and it can therefore be manufactured to be small and lightweight, and can be easily transported when used in a laboratory. It is extremely convenient for carrying out experiments by placing it on a table or the like.

[Brief explanation of drawings]

The drawings show an embodiment of the micromixer according to the present invention. Fig. 1 is an exploded perspective view of the case, cap and motor, Fig. 2 is an exploded perspective view of the saucer and microplate, and Fig. 3 is an exploded perspective view of the micromixer. FIG. 3 is a vertical cross-sectional view of the mixer. 1... Case, 5... Cap, 6... Support plate, 7... Support leg, 9... Saucer, 11... Motor,
14... Rotating axis, 15... Rod, 16... Weight.

Claims (1)

[Scope of utility model registration request] A support made of an adhesive synthetic resin sheet is attached to the bottom of the case to allow it to be placed on a table, etc. over as wide an area as possible, and the case has flexible support legs interposed at the four corners. A low-height motor is fixed to the bottom of the tray, and a weight is attached to the rotating shaft of the motor with a rod extending in a direction perpendicular to the axis. A micro mixer that is characterized by: