JP5348985B2 - Dental lighting device - Google Patents

Description

  The present invention relates to a dental lighting device that illuminates the oral cavity in dentistry, and more particularly to a dental lighting device that facilitates maintenance work of an arm provided to hold an illumination head in an arbitrary position.

  A dental lighting device is used as a device for illuminating the oral cavity during dental treatment or the like. The dental lighting device is configured as follows, for example. A first arm provided with a support and provided at the upper end of the support so as to be rotatable with respect to the support is provided. And a second arm disposed at the tip of the first arm and rotatably provided with respect to the first arm, and an illumination head having a light source is attached to the tip of the second arm. ing.

Here, springs such as a gas spring are disposed on the second arm, and a holding force can be applied to the second arm by a reaction force of the gas spring. As a result, the surgeon can move the illumination head to an appropriate position and hold the illumination head at that position. For example, Non-Patent Document 1 discloses a medical optical device having a spring. According to this, the optical device can be moved to a predetermined position using the arm, and the arm and the light source can be held at a predetermined position by a device such as a spring arranged in the arm. is there. Here, a spring is used to obtain the holding force.
Kiyoshi Okano and Akimasa Shibuya, “Dental Clinic in the Future”, Gakuken Shoin Co., Ltd., May 25, 1993, P82, P107 (Figure 5-20)

  As described above, since not only the functional aspect but also the appearance of the dental unit is important, each device such as a spring is arranged inside the arm so as to be hidden from the appearance. Accordingly, it is necessary to install each device in a relatively small space.

  Therefore, in a conventional dental unit as shown in Non-Patent Document 1, each device such as a spring is often placed on an arm in a state that is difficult to remove once installed. When the spring is used, outgassing or the like may occur, so that periodic replacement is necessary, and it is difficult to perform the replacement or maintenance. In that case, for example, the gas spring cannot be removed unless all the devices including other devices are removed, resulting in troublesome work.

  In view of the above problems, an object of the present invention is to provide a dental lighting device that facilitates replacement of a gas spring and has excellent maintainability.

  The present invention will be described below. In addition, in order to make an understanding of this invention easy, the referential mark of an accompanying drawing is appended, but this invention is not limited to the form of illustration by it.

The invention according to claim 1 is a dental illumination device 10 capable of illuminating the inside of an oral cavity, and includes an illumination head 13 having a light source, and an arm 20 having one end connected to the illumination head and having a link mechanism. The link mechanism includes a case, two bases concealed inside the case and extending along the longitudinal direction of the arm, and concealed inside the case and between the two bases along the longitudinal direction of the arm. A gas spring to be disposed, a part of which is connected to the case and another part of the gas spring is connected to the case to act as a brake of the link mechanism, and a pair of holding members 30 and 50 provided at the end of the gas spring And one of the pair of holding members is fixed to the case, the other of the pair of holding members is fixed to the base, and one of the holding members is in a direction perpendicular to the longitudinal direction of the arm. Movable Is a, the other holding member is a movable parallel to the longitudinal direction of the arm, gas spring in position the arms acts against the link mechanism by being sandwiched by a pair of holding members It is possible to unload the holding force by releasing the holding state and to release the gas spring from the arm while generating the holding force to be clamped. Solve.

According to a second aspect of the present invention, in the dental lighting device 10 according to the first aspect, the case can be divided into at least two, one of which is included in the link mechanism, and the other This case is not included in the link mechanism, and the other case is removed from the arm, and the holding state of the gas spring 40 is released, so that the components of the link mechanism can be removed from the arm without removing from the arm 20. The gas spring can be detached.

  According to a third aspect of the present invention, in the dental lighting device 10 according to the first or second aspect, the pair of holding members 30 and 50 are the first holding member 30 provided on one end side of the gas spring 40, and others. The second holding member 50 is provided on the end side, and the gas spring is sandwiched between the first holding member and the second holding member, and at least one of the first holding member and the second holding member is a gas spring. The portion in contact with the gas spring is formed so as to be movable in a direction parallel to the reaction force generated by the gas spring.

  According to the dental lighting device of the present invention, since the reaction force (holding force) is generated by sandwiching the gas spring 40, normally the holding force can be appropriately obtained. On the other hand, when exchanging the gas spring, etc., it is only necessary to release the clamping state, or the holding force can be adjusted only by adjusting the clamping force. Therefore, maintenance and replacement of the gas spring can be easily performed.

  Such an operation and gain of the present invention will be made clear from the best mode for carrying out the invention described below.

  Hereinafter, the present invention will be described based on embodiments shown in the drawings. However, the present invention is not limited to these embodiments.

  FIG. 1 is an external view of a dental lighting device 10 according to one embodiment. The dental illumination device 10 includes a support column 11, a first arm 12, a second arm 20, and an illumination head 13. This will be described in detail below.

  The support | pillar 11 is a pillar provided in order to install the dental illuminating device 10 in a floor, a dental unit, etc. FIG. Therefore, it has rigidity and strength to the extent that the dental lighting device is stably arranged. One end is fixed to a floor, a dental unit or the like. Moreover, the support | pillar is hollow and wiring etc. are passed through the inner side.

  The first arm 12 is a tubular long member, and one end of the first arm 12 is attached to the end of the support 11 that is not fixed to the floor or dental unit. Here, the first arm 12 is attached so that the longitudinal direction of the first arm 12 is substantially orthogonal to the longitudinal direction of the support column 11, and the first arm 12 can rotate in the orthogonal plane. It has been made possible. Thereby, it becomes possible to move the illumination head 13 to a required position together with the second arm 20 described later. Moreover, wiring etc. are passed through the tubular inner side.

  The second arm 20 is also a tubular member, and the vicinity of one end thereof is attached to the vicinity of the other end of the first arm 12. Here, the second arm 20 is attached so that the longitudinal direction of the second arm 20 is substantially orthogonal to the longitudinal direction of the first arm 12. At this time, the second arm 20 is configured to be able to rotate in a plane parallel to the longitudinal direction of the first arm 12 and in a plane perpendicular to the first arm 12 around the attached portion. Thereby, it becomes possible to move the illumination head 13 to a required position together with the first arm 12 described above. A so-called universal joint can be used to form such a rotatable structure. In addition, members having various functions are provided inside the cases 21 and 22 forming a tubular outer shell, as will be described in detail later.

The illumination head 13 is a part that emits light by including a light source, and includes a holding member 14, grips 15 and 15, a frame 16, a front panel 17, and a cover 18 in appearance.
The holding member 14 is a member that connects the frame 16 and the second arm 20. In this embodiment, a part of the convex shape of the member bent in an arc shape is attached to the other end side of the second arm 20, and the both end portions of the arc shape are connected to the frame 16. The holding member 14 is attached to the second arm 20 and the holding member 14 so as to be swingable and pivotable at the attachment portion, and convenience for use is achieved.

  The grips 15 and 15 are members that extend from the back surface portion (second arm 20 side) of the frame 16 to the front surface side (light exit surface side) of the illumination head 13 and form a so-called handle. The user can move the lighting head 13 to an arbitrary position by grasping the handles 15 and 15 and pulling or pushing the lighting head 13 back.

  The frame 16 is a bowl-shaped member, and the holding member 14 and the grips 15 and 15 are provided on the outside thereof as described above. On the other hand, a light source is disposed inside the frame.

  The front panel 17 is a panel arranged so as to be covered with the opening on the front side of the frame 16 having a bowl shape, and is formed so as to transmit light. Illumination light emitted from the light source passes through the front panel 17 and is emitted as illumination. Here, the light emitted through the front panel 17 is reflected light that is reflected from the light source by the reflecting plate provided inside the frame 16, and is so-called shadowless by the action of the reflecting plate. It functions as a light.

  The cover 18 is provided at the front side of the front panel 17 at the approximate center of the front panel 17 and is formed of a material that does not transmit light. The cover 18 is particularly disposed in front of the light source, and blocks light that is going to be emitted directly from the light source to the outside.

  In appearance, the dental lighting device 10 has the above-described configuration. Further, as described above, the support column 11, the first arm 12, and the second arm 20 are formed in a hollow shape, and various members are concealed on the inner side. Thereby, the dental illuminating device 10 with a favorable external appearance can be provided. Hereinafter, each member arrange | positioned inside the 2nd arm 20 is demonstrated. FIG. 2 is a view excluding the cases 21 and 22 of the second arm 20 of the dental lighting device 10 shown in FIG. FIG. 3 is an enlarged view of the portion of the second arm 20 in FIG. The second arm 20 will be described in more detail with reference to FIGS.

  In addition to the cases 21 and 22, the second arm 20 includes the base bodies 23 and 23, the brake 24, the first holding member 30, the gas spring 40, the second holding member 50, the air cylinder 28, the limit switch 29, and the connecting arms 60 and 65. It has.

The bases 23 and 23 are two flat plate-like long members extending substantially parallel to the inner longitudinal direction of the cases 21 and 22, and are base side shafts 61 and 63 of connecting arms 60 and 65 described later. The two bases 21 and 22 are connected to each other while being pivotally attached to the connecting arms 60 and 65. The bases 23, 23 form the outline of the outline of the second arm 20.
A brake 24, a first holding member 30, a gas spring 40, a second holding member 50, an air cylinder 28, and a limit switch 29 are disposed between the base bodies 23 and 23. Further, holes 23a, 23a,... Are provided on the side surfaces of the base bodies 23, 23 at predetermined intervals. Thereby, it is possible to reduce the weight of the base bodies 23, that is, to reduce the weight of the second arm 20. Further, slits 23b and 23b that are long in the longitudinal direction are provided at a portion where the gas spring 40 and the second holding member 50 are connected. The slits 23b and 23b will be described later.

  The brake 24 is a member that gives appropriate resistance to the vertical movement of the second arm 20. Specifically, the second arm 20 can be held and held at an arbitrary position by applying the resistance force to the base bodies 23 and 23. Such an action of the brake 24 is common to an action of the gas spring 40 which will be described in detail later, but the brake 24 is provided in a position to assist the holding force of the gas spring 40. Thereby, even if the gas spring 40 has a problem (decrease in holding force due to gas loss), the brake 24 can prevent the second arm 20 from being lowered. The brake is not particularly limited as long as it is a device that can give resistance to movement and rotation of the link mechanism. Among these, in this embodiment, the brake 24 as shown in FIG. 4 is applied. The brake 24 includes a rectangular parallelepiped main body 25, elastic members 26 and 26, and connecting members 27, 27, 27, and 27. The main body 25 is provided with holes 25b, 25b, 25b, 25b penetrating up and down, and the main body 25 is fixed to the case 22 through fixing members such as screws. Further, the main body 25 is provided with a through hole 25a in a direction passing between the two substrates, and the elastic members 26, 26 are inserted therein, and both ends thereof are held by the connecting members 27, 27, 27, 27. . The connecting members 27, 27, 27, 27 are formed so that one end thereof protrudes from the main body 25, and the protruding portion is inserted into the holes 23 b, 23 b,. , 23 and the brake 24 are connected. Accordingly, the brake 24 is connected to both the case 22 and the base bodies 23 and 23 and has a role of applying a brake in a link mechanism described later.

  The first holding member 30 is a member that holds one end of the gas spring 40. FIG. 5 is a view when the first holding member 30, the gas spring 40 and the second holding member 50 are combined, and FIG. 6 is an exploded perspective view of the first holding member 30. As can be seen from FIG. 6, the first holding member 30 includes a fixing member 31, a connecting member 32, a connecting rod 35, and a lifting operation member 36.

The fixing member 31 is a gate-shaped block-shaped member that is provided with a groove 31b that penetrates from one side surface to a side surface that faces the fixing member 31 and that also opens on the lower surface side. Further, the fixing member 31 is provided with a hole 31a that penetrates from the upper surface of the fixing member 31 to the groove 31b. Further, holes 31c, 31c,... Are also provided in the vicinity of the four corners of the upper surface of the fixing member 31, and the fixing member 31 and the case 22 are connected by screws (not shown). Thereby, one end side of the gas spring 40 is connected to the case 22 via the fixing member 31.
The connecting member 32 includes an elevating part 33 having a substantially spherical shape and a screw hole 33a penetrating in the vertical direction, and a gas spring connecting part 34 having a U-shaped cross section. Grooves 34 a and 34 a having a semicircular bottom surface are provided at the front ends of the opposing pieces of the gas spring connecting portion 34.

  The connecting bar 35 is a round bar and is passed through a through hole 43a at one end of the gas spring 40 as will be described later. The elevating operation member 36 is a cylindrical member, and a screw groove 36a is formed on the outer peripheral surface thereof. An operation unit 36b for inserting and operating a tool is provided on the upper surface.

  The 1st holding member 30 which has such a member is combined as follows, for example. That is, the screw groove 36 a of the lifting operation member 36 having a male screw shape is screwed into the screw hole 33 a having a female screw shape and is connected to the lifting portion 33. At this time, the width of the groove 31b indicated by D in FIG. 6 is formed larger than the width of the elevating part 33 indicated by C in FIG. It is possible to move up and down in 31b. Thereby, one end of the gas spring 40 connected to the connecting member 32 is fixed to the case 22 via the fixing member 31.

  The gas spring 40 is an ordinary gas spring of the compression spring type. In FIG. 7, the external view of the gas spring 40 was shown. The gas spring 40 is provided with a cylinder 41, a rod 42, a rod side connecting portion 43, and a cylinder side connecting portion 44. That is, when the rod 42 is nested in the cylinder 41 and the rod 42 enters the cylinder 41, the high-pressure gas provided in the cylinder 41 is compressed. Thereby, the gas spring 40 generates a reaction force. Further, in order to connect the gas spring 40 to another device and to cause the reaction force generated here to act on the other device, the cylinder side connecting portion 44 and the rod side connection are respectively connected to the cylinder 41 and the rod 42. Part 43 is attached. Specifically, through holes 44a and 43a are respectively provided in the cylinder side connecting portion 44 and the rod side connecting portion 43, and a connecting rod is inserted therein as described later.

The second holding member 50 is a member that holds the other end of the gas spring 40 and fixes it to the bases 23 and 23. FIG. 8 shows an exploded perspective view of the second holding member 50. As can be seen from FIG. 8, the second holding member 50 includes a connecting member 51, a connecting rod 54, presser members 55 and 55, an operation member 56, and a fixing member 57.
The connecting member 51 further includes a rod body 52 and a gas spring connecting portion 53. The rod body 52 is a round bar, and its outer peripheral surface is a screw portion 52a provided with a screw groove. On the other hand, the gas spring connecting portion 53 is a member attached to one end of the rod body 52 and a member having a U-shaped cross section. The outer side of the piece provided in the middle of the U-shaped cross section is attached to one end face of the rod body 52. In addition, grooves 53a and 53a having a semicircular bottom surface are provided at the front ends of the opposing pieces having a U-shaped cross section.

  The connecting rod 54 is a round bar and has a diameter that can be inserted into the grooves 53 a and 53 a of the gas spring connecting portion 53. Further, both end portions 54a, 54a of the connecting rod 54 are formed to be slightly thin. The diameters of the end portions 54a and 54a are substantially the same as or slightly smaller than the slits 23b and 23b (see FIG. 3) of the base bodies 23 and 23 described above.

  The holding members 55, 55 are annular members, and the connecting rod 54 can be inserted inside them. Thereby, as will be described later, the connection of the connecting member 51, the connecting rod 54, and the gas spring 40 can be stabilized.

  The operation member 56 is a thick cylindrical member, and a screw groove 56a is formed on the inner surface of the operation member 56 to be screwed into the screw portion 52a of the connecting member 51. Further, holes 56b, 56b,... Are provided on the outer peripheral surface of the operation member 56. Thus, the operation member 56 can be rotated by inserting a tool or the like into the holes 56b, 56b,... With the operation member 56 screwed into the screw portion 52a of the connecting member 51.

The fixing member 57 has a cylindrical portion 57a having a thick cylindrical shape, and fixing portions 57c and 57c. The diameter of the through hole 57 b of the cylindrical portion 57 a is formed larger than the diameter of the rod body 52 of the connecting member 51 and smaller than the diameter of the outer periphery of the operation member 56. Thus, the operation member 56 does not enter the through hole 57b of the fixing member 57 but stays on one side of the fixing member 57, and the rod body 52 of the connecting member 51 can move in the through hole 57b. It becomes.
The fixed portion 57c is shaped to stand on the outer peripheral surface from a position opposite to the outer peripheral surface of the cylindrical portion 57a. As a result, the width of the fixing member 57 in one direction is increased. The size of the widened width is set to be substantially the same as that between the bases 23 and 23 (see FIG. 3). In addition, screw holes 57d and 57d are provided in the end face of the fixing portion 57c, and screws (not shown) are fitted therein and fixed to the base bodies 23 and 23 (see FIG. 3). As a result, the second holding member 50 is fixed to the base bodies 23 and 23, and the other end of the gas spring 40 is also fixed to the base bodies 23 and 23 via this.

  The assembly of the first holding member 30, the gas spring 40, and the second holding member 50 described so far is performed as described below. FIG. 5 is a view showing the posture when the first holding member 30, the gas spring 40, and the second holding member 50 are combined and attached to the base bodies 23 and 23 (see FIG. 3). It is. 9 is an enlarged view of the portion indicated by E in FIG. 5, and FIG. 10 is an enlarged view of the portion indicated by F in FIG.

The connection between the gas spring 40 and the second holding member 50 is as follows. That is, as shown in FIGS. 5 and 9, the connecting rod 54 is passed through the through hole 44 a (see FIG. 7) of the cylinder side connecting portion 44 of the gas spring 40. Then, holding members 55 and 55 are fitted into both ends of the connecting rod 54. At this time, the holding members 55, 55 are fitted so that the end portions 54a, 54a of the connecting rod 54 protrude outside the holding members 55, 55. With the connecting rod 54 and the holding members 55, 55 attached to the cylinder side connecting portion 44 of the gas spring 40 in this way, the tip of the cylinder side connecting portion 44 is placed inside the U-shape of the gas spring connecting portion 53. While being inserted, the connecting rod 54 is disposed so as to be passed into the two grooves 53a and 53a. Thus, normally, the gas spring 40 and the second holding member 50 are connected, but the gas spring 40 can be extracted from the second holding member 50 in the direction of the arrow indicated by G in FIG. Further, the end portions 54a and 54a having a small diameter of the connecting rod 54 are disposed in the slits 23b and 23b of the base bodies 23 and 23 (see FIG. 3).
On the other hand, the operating member 56 is screwed into the screw portion 52 a of the rod body 52, and the end portion of the rod body 52 is passed through the through hole 57 b of the fixing member 57 fixed to the base bodies 23 and 23.

  The connection between the gas spring 40 and the first holding member 30 is as follows. That is, as shown in FIGS. 5 and 10, the connecting rod 35 is passed through the through hole 43 a (see FIG. 7) of the rod side connecting portion 43 of the gas spring 40. With the connecting rod 35 attached to the rod side connecting portion 43 of the gas spring 40 in this way, the tip of the rod side connecting portion 43 is inserted into the U-shaped inside of the gas spring connecting portion 34 and connected. The rod 35 is arranged so as to be passed into the two grooves 34a, 34a. As a result, the gas spring 40 and the first holding member 30 are normally connected, but the gas spring 40 can be extracted from the first holding member 30 in the direction of the arrow indicated by H in FIG.

  On the other hand, the elevating part 33 of the connecting member 32 is disposed below the fixing member 31, and the screw hole 33 a is screwed into the screw groove of the elevating operation member 36. Here, the elevating part 33 can move up and down in the groove 31 b of the fixing member 31. However, in a state where the gas spring 40 is functioning (normal use state), the elevating part 33 is not connected to the fixing member 31. It is arranged below.

  The fixing member 31 is connected to the case 22 by a screw (not shown), and a reaction force of the gas spring 40 indicated by an arrow K in FIGS. 5 and 10 is applied thereto. As a result, the reaction force acts as a so-called brake that prevents the movement of the second arm 20 via the link mechanism to generate a holding force, and the second arm 20 can be held at a predetermined position.

  Here, in order to generate such a reaction force in a normal state, as can be seen from the portion indicated by E in FIG. 5, a larger portion of the rod body 52 is disposed on the gas spring 40 side than the fixing member 57. . As a result, the cylinder 41 of the gas spring 40 moves in the direction indicated by the arrow J in FIG. 5, and a reaction force corresponding to the amount of movement can be generated. In order to move the rod body 52, the operation member 56 screwed here is rotated. Thus, in the dental lighting device 10, it is possible to easily adjust the reaction force of the gas spring 40, that is, the holding force of the arm.

  Returning to FIG. 3, members provided on the base bodies 23 and 23 will be described. The air cylinder 28 is a power source for moving the second arm 20 up and down with a panel switch (not shown), for example, without manual operation. Accordingly, the dental lighting device 10 is configured so that it can be moved by a panel switch or the like (not shown) in addition to directly moving the lighting head 13 up and down by grasping the handles 15 and 15 of the lighting head 13.

  The limit switch 29 limits the movement range so that the lighting head 13 and the second arm 20 do not collide with people, other members, or devices when the second arm 20 is moved up and down using the air cylinder 28. Switch. Thereby, the safety | security in the movement of the illumination head 13 not based on manual is aimed at.

  The connecting arm 60 is a member that connects the second arm 20 to the first arm 12, and one end side thereof is pivotally attached to the first arm 12 and the other end side is attached to the second arm 20. Here, the connection arm 60 and the second arm 20 are connected as follows. FIG. 11 shows an explanatory diagram. The connecting arm 60 is connected to the second arm 20 by two shafts, that is, a base-side shaft 61 and a case-side shaft 62. As shown in FIG. 11 a, the connecting arm 60 and the bases 23 and 23 are pivotally attached to the base side shaft 61. On the other hand, as shown in FIG. 11 b, the connecting arm 60 and the case 22 are attached to each other by a case side shaft 62. Thereby, a link mechanism as will be described later is formed.

  The connecting arm 65 is a member that connects the second arm 20 to the lighting head 13, and one end side thereof is pivotally attached to the lighting head 13 and the other end side is attached to the second arm 20. Here, the connection arm 65 and the second arm 20 are connected as follows. FIG. 12 shows a diagram for explanation. The connecting arm 65 is connected to the second arm 20 by two shafts, that is, a base-side shaft 63 and a case-side shaft 64. As shown in FIG. 12A, the connecting arm 65 and the bases 23 and 23 are pivotally attached to the base side shaft 63. On the other hand, as shown in FIG. 12B, the connecting arm 60 and the case 22 are pivotally attached to the case side shaft 64. Thereby, a link mechanism as will be described later is formed.

  The following link mechanism is formed by the second arm 20 as described above. FIG. 13 conceptually shows the link mechanism. That is, the base member 23, 23, the connecting arm 65, the case 22, and the connecting arm 60 form a four-node link mechanism. And the brake 24 and the gas spring 40 are provided so that the base | substrates 23 and 23 and the case 22 may be passed, and the motion of a 4-joint link mechanism is controlled. As a result, the second arm 20 can be held in a predetermined position.

  As described above, in the dental lighting device 10, the gas spring 40 is sandwiched between the first holding member 30 and the second holding member 50. Therefore, replacement of the gas spring 40 can be facilitated and excellent maintainability can be achieved. The procedure for removing the gas spring 40 will be specifically described below.

  First, the operation member 56 of the second holding member 50 is rotated from the normal state shown in FIG. 5 to the state shown in FIG. Accordingly, the gas spring coupling portion 53 and the cylinder portion 41 of the gas spring 40 are moved in the direction indicated by the arrow L in FIG. 14 due to the relationship between the operation member 56 and the screw portion 52a. Since the movement of the cylinder portion 41 in the direction of the arrow L is a movement in the direction of lowering the reaction force generated by the gas spring 40, the reaction force of the gas spring 40 can be lowered. At this time, the end portions 54a and 54a of the connecting rod 54 disposed in the slits 23b and 23b of the base bodies 23 and 23 move in the slits 23b and 23b.

  Next, in the first holding member 30, the elevating operation member 36 is operated from the posture shown in FIG. 15a to the posture shown in FIG. 15b. That is, the elevating operation member 36 is rotated to raise the elevating part 33 of the connecting member 32. As a result, the elevating part 33 is raised in the groove 31b. In this embodiment, by allowing the connecting member 32 to move up and down as described above, it is possible to prevent interference with other members during removal. Therefore, each member can be accommodated more compactly.

  As a result, the rod side connecting portion 43 and the first holding member 30 of the gas spring 40 can be detached, and the cylinder side connecting portion 44 and the second holding member 50 can be detached. On the other hand, in order to attach the detached gas spring 40 or the replacement gas spring to the first holding member 30 and the second holding member 50, the above procedure may be reversed.

  Thus, according to the dental illumination of the present invention, it is not necessary to remove other members when performing maintenance or attachment / detachment of the gas spring. Accordingly, it becomes possible to easily perform the maintenance and replacement of the gas spring.

  While the present invention has been described in connection with the most practical and preferred embodiments at the present time, the present invention is not limited to the embodiments disclosed herein, The present invention can be appropriately changed without departing from the gist or concept of the invention that can be read from the claims and the entire specification, and a dental lighting device with such a change is also included in the technical scope of the present invention. Must be understood as.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view of the dental illuminating device of this invention which concerns on 1st embodiment. It is the figure which removed the case of the 2nd arm among the dental illuminating devices shown in FIG. It is the figure which paid its attention to the 2nd arm. It is a disassembled perspective view of a brake. It is the figure which expanded the 1st holding member, the 2nd holding member, and the gas spring. It is a disassembled perspective view of a 1st holding member. It is an external appearance perspective view of a gas spring. It is a disassembled perspective view of a 2nd holding member. It is a perspective view of the part shown by E in FIG. It is a perspective view of the part shown by F in FIG. It is a figure for demonstrating the connection of a connection arm and a 2nd arm. It is a figure for demonstrating the connection of a connection arm and a 2nd arm. It is a conceptual diagram of a link mechanism. It is a figure explaining the procedure which remove | releases a gas spring. It is a figure explaining the procedure which remove | releases a gas spring.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Dental illuminating device 11 Support | pillar 12 1st arm 13 Illumination head 14 Holding member 15 Handle 16 Frame 17 Front panel 18 Cover 20 2nd arm 21 Case 22 Case 23 Base 23a Hole 23b Slit 24 Brake 25 Main body 25a Through-hole 25b Hole 26 Elastic member 27 Connecting member 28 Air cylinder 29 Limit switch 30 First holding member 31 Fixing member 31a Hole 31b Groove 31c Hole 32 Connecting member 33 Lifting portion 33a Screw hole 34 Gas spring connecting portion 34a Groove 35 Connecting rod 36 Lifting operation member 36a Screw Groove 36b Operation part 40 Gas spring 41 Cylinder 42 Rod 43 Rod side connection part 43a Through hole 44 Cylinder side connection part 44a Through hole 50 Second holding member 51 Connection member 52 Rod body 52a Screw part 53 Gas Pulling connecting portion 53a groove 54 connecting rod 54a end 55 holding member 56 operation member 56a screw groove 56b hole 57 fixing member 57a cylindrical portion 57b through hole 57c fixing portion 57d screw hole 60 connecting arm 61 base side shaft 62 case side shaft 63 base Side shaft 64 Case side shaft 65 Connecting arm

Claims (3)

A dental lighting device capable of illuminating the oral cavity,
An illumination head having a light source, and an arm having one end connected to the illumination head and including a link mechanism,
The link mechanism is
Case and
Two bases concealed inside the case and extending along the longitudinal direction of the arm;
A gas spring concealed inside the case and disposed between the two substrates along the longitudinal direction of the arm;
A brake that is partly connected to the case and another part is connected to the case and acts as a brake of the link mechanism;
A pair of holding members provided at the end of the gas spring,
One of the pair of holding members is fixed to the case, the other of the pair of holding members is fixed to the base,
The one of the holding members is movable in a direction perpendicular to the longitudinal direction of the arm, and the other of the holding members is movable in parallel to the longitudinal direction of the arm;
The gas spring is clamped by the pair of holding members to generate a holding force that acts on the link mechanism and holds the arm in a predetermined position, and releases the clamping state. A dental illumination device characterized in that the holding force is unloaded and the gas spring can be detached from the arm. The case can be divided into at least two, one case of which is included in the link mechanism, the other case is not included in the link mechanism,
When the other case is removed from the arm and the holding state of the gas spring is released, the gas spring can be detached from the arm without removing the components of the link mechanism from the arm. The dental illumination device according to claim 1, wherein the dental illumination device can be used. The pair of holding members are a first holding member provided on one end side of the gas spring and a second holding member provided on the other end side, and the gas spring includes the first holding member and the second holding member. And the clamping is performed,
In at least one of the first holding member and the second holding member, a portion in contact with the gas spring is formed to be movable in a direction parallel to a reaction force generated by the gas spring. The dental lighting device according to claim 1 or 2.

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