JP2024047745A - Detachable flip-up glasses - Google Patents

Abstract

[Problem] To provide detachable flip-up eyeglasses that can detachably fix a front frame with any lens attached to the eyeglass frame, prevent unsightly appearance, and can be manufactured inexpensively. [Solution] In the detachable flip-up eyeglasses 100 of the present invention, a rotating shaft 15 for flipping up the front frame 2 is provided on either the connecting member 13 that connects the end pieces 12, 12 together, or the front frame 2 that is separate from the eyeglass frame 1 and has lenses 22 attached thereto, while a clip part 3 that detachably holds the rotating shaft 15 is provided on the other side of the front frame 2 or the connecting member 13 that does not have the rotating shaft 15, so that the clip part 3 can rotate the front frame 2 to flip it up while applying a clamping force to the rotating shaft 15, and the clamping force of the clip part 3 can hold the front frame 2 at any flip-up position. [Selected Figure] Figure 1

Description

The present invention relates to detachable flip-up eyeglasses in which the user can selectively attach and detach a front frame with attached lenses, which is separate from the eyeglass frame worn by the user, as needed, and in which the attached front frame can be flipped up and fixed at any angle for use.

Well-known eyeglasses are fitted with various lenses, such as lenses for vision correction for myopia, hyperopia, etc., lenses that block sunlight and reflected light, and lenses that magnify visual objects. Users can select and wear eyeglasses with the appropriate lenses according to their own visual acuity and intended use. However, if there are multiple visual acuity abnormalities or depending on the intended use, users must frequently change to different eyeglasses with the most suitable lenses. This causes users the inconvenience of having to carry multiple pairs of eyeglasses with them on a regular basis.

To solve this problem, eyeglasses are known that have a front frame with any lens attached to it, which is rotatably fixed to the eyeglass frame. These eyeglasses are known as flip-up eyeglasses, and can be used by flipping up and down the front frame (both operations will be referred to as "flip-up" below) to easily switch between the naked eye state and the state with the lens. Also, if a different lens is already attached to the eyeglass frame, it can be used by switching between the state with a vision correction lens, for example, and the state with a sunglass lens superimposed on it.

However, even with flip-up glasses, if the strength of the lenses attached to the front frame no longer matches, or if the color or polarization of the sunglasses lenses does not suit the environment, the entire pair of glasses must eventually be replaced with glasses with different lenses. Therefore, even with flip-up glasses, the user still needs to carry multiple pairs of glasses, which leaves the problem of bulk and inconvenience.

On the other hand, even if lenses are already attached to the eyeglass frame, there are cases where, for example in dark places, only the sunglasses lenses that are placed over the vision correction lenses become unnecessary. In this way, even flip-up eyeglasses that already have lenses attached to the eyeglass frame are convenient because they can be flipped up as described above when the lenses in the front frame are temporarily not needed.

However, if the front frame is not needed for a long period of time, the weight of the front frame in the flipped-up state can cause fatigue to accumulate in the wearer, and the design of the front frame can make the appearance of the eyeglass frames when worn unattractive. Therefore, with flip-up glasses where the front frame cannot be removed, there is a problem that if the front frame is not needed for a long period of time, inconveniences arise in terms of fit and appearance.

In such conventional flip-up eyeglasses, for example, a technology has been developed that allows the front frame to be attached and detached to the eyeglass frame using a magnet, and that allows the front frame to be flipped up and pivoted between a use position and an unused position.
Patent Document 1 discloses a technique for an eyeglass frame with a sub-lens device as shown in Fig. 11. In this technique, an eyeglass frame 800 with a sub-lens device is composed of a main frame 810, a sub-lens device 820, and a connecting means 830, and a magnet 840 attached to the main frame 810 is magnetically attached to the connecting means 830, so that the sub-lens device 820 fixed to the connecting means 830 can be attached and detached to the main frame 810. In addition, the connecting rod 850 of the sub-lens device 820 and the accommodation chamber 860 of the connecting means 830 that receives it each have the same polygonal cross section, and when the connecting rod 850 rotates relative to the accommodation chamber 860 in the flip-up, the accommodation chamber 860 and the connecting rod 850 engage with each other at each of the interior angles of the polygon, so that "the sub-lens device can be held in an appropriate position."

Patent Document 2 also discloses a technology for roll-up sunglasses to be attached to glasses as shown in FIG. 12. In this technology, roll-up sunglasses 900 to be attached to glasses are composed of two glass lenses 910, 910 as sunglasses lenses, and a clamping device 920, and by operating a flip-off piece 930 of the clamping device 920, the clamping claws 940 can be clamped to the bridge of the glasses to fix it or remove it. When the glass lens 910 is flipped up, it rotates around the fixed surface 960 of the U-shaped pivot 950 as the rotation axis. When the fixed surface 960, which has a rectangular cross section, is rotated and reversed, the spring 970, which applied elastic force to one side of the fixed surface 960 to fix its position, switches to applying elastic force to the opposite side of the fixed surface 960. This allows the glass lens 910 to be "rotated to a specified angle."

Utility Model Registration No. 3074887 Utility Model Registration No. 3175958

However, in the technology of Patent Document 1, the fixed part of the connecting means for attaching the sub-lens device to the main frame and the rotation axis of the sub-lens device are located in different positions. This causes the connecting means itself to be large, which creates a problem in that the entire sub-lens device stands out and looks unsightly.

This problem is also present in the technology of Patent Document 2, where the clamping claws for clamping and fixing the clamping device to the bridge and the fixing surface of the U-shaped pivot that serves as the rotation axis of the glass lens are configured separately and in different positions, which means that the clamping device itself has to be large.

The present invention was made in consideration of the above problems, and its purpose is to provide detachable flip-up eyeglasses that can be detachably fixed to an eyeglass frame with a front frame to which any lens is attached, can prevent unsightly appearance, and can be manufactured inexpensively.

The means adopted by the present inventors to solve the above problems will be described below.
The detachable flip-up eyeglasses of the present invention are detachable flip-up eyeglasses having a eyeglass frame that includes at least left and right temples, a pair of end pieces that rotatably connect the temples, and a connecting member that connects the end pieces together, and a front frame that is separate from the eyeglass frame and has lenses attached thereto, the front frame being detachable.
In the present invention, the temple end portion may be separate from the connecting member, but may also be integral with the connecting member, with part of the connecting member forming the temple end portion.

The basic configuration is such that the connecting member is provided with a rotating shaft portion, and the front frame is provided with a clip portion that detachably holds the rotating shaft portion. The rotating shaft portion is a shaft portion that serves as a central axis of rotation when the front frame is flipped up.
Here, the clip portion in the present invention refers to a structure for clamping an object while applying a clamping force to the object by any means. The clip portion includes not only a structure configured as a part of the front frame, but also a structure provided on the front frame as a separate body.

The clip portion can rotate and lift up the front frame while applying a clamping force to the rotation shaft portion, and the clamping force of the clip portion can hold the front frame at any lifted position.
The clip part applies a clamping force to the rotating shaft part, so that the front frame can be stably fixed to the eyeglass frame. In addition, because the clip part can rotate the front frame while applying a clamping force to the rotating shaft part, there is an appropriate resistance when flipping up the glasses, so that the wearer can easily adjust the flip-up position to their desired position.
Furthermore, since the clip portion continuously applies a clamping force to the rotating shaft portion, the front frame can be stably held in any flip-up position.

As described above, in the present invention, the rotating shaft portion is a fixing portion for attaching and detaching the clip portion, and the rotating shaft portion fixed by the clip portion itself also serves as the central axis of rotation when lifting up the front frame.
Therefore, the structure for fixing the front frame to the eyeglass frame and the structure for rotating, flipping up, and holding the front frame can be realized as one unit, making it possible to simplify the structure.

As a means that can be adopted to solve the problem, a configuration in which a rotating shaft portion is provided on the front frame and a clip portion is provided on the connecting member for detachably clamping the rotating shaft portion can be adopted.
In this way, even if the rotating shaft portion is provided on the front frame side rather than the connecting member, and the clip portion is provided on the connecting member side, due to the same action, the rotating shaft portion serves as a fixed portion for attaching and detaching the clip portion, and the rotating shaft portion itself fixed by the clip portion can be used as the central axis of rotation when flipping up the front frame.
Therefore, the structure for fixing the front frame to the eyeglass frame and the structure for rotating, flipping up, and holding the front frame can be realized as one unit, making it possible to simplify the structure.

Among the means that can be adopted to solve the problem, the following means can also be used.
As one of the removable flip-up glasses using other means, in addition to the above configuration, the clip portion can be configured to include a bearing portion that receives the rotating shaft portion and a movable piece that applies a load to the rotating shaft portion, and by operating the movable piece, it is possible to switch the clip portion between a clamped state and a non-clamped state relative to the rotating shaft portion.

By configuring the clip part with a bearing part and a movable piece, it is easier to switch between the clamping state and the non-clamping state compared to when the clip part is configured as an integrated part. This makes it easier to attach and detach the clip part to and from the rotating shaft part.

In any of the above configurations, it is possible to make the cross-sectional shape of the rotating shaft portion polygonal, and to make at least a portion of the contact surface of the clip portion with the rotating shaft portion polygonal in cross-sectional shape corresponding to the cross-section of the rotating shaft portion.
By forming the rotating shaft and at least a part of the contact surface of the rotating shaft in the clip part into a polygonal shape, it is possible to position the clip part at each angle according to the interior angle of the polygon, thereby making it possible to selectively position the flip-up position of the front frame at each predetermined angle.

In addition, the contact surface of the rotating shaft is a sliding surface for rotation during flip-up, and if the cross section of the contact surface between the rotating shaft and the clip part is polygonal, when the contact surface of the clip part rides over the part corresponding to the corner of the polygon of the rotating shaft during rotation, the clamping force of the clip part gradually increases the resistance, and then when the corner is overcome, the resistance suddenly decreases (a so-called click feeling). This makes it easier for the wearer to feel that it has been positioned.
In addition, the polygon corresponding to the cross section of the rotating shaft portion is not limited to being a polygon that is identical to the cross-sectional shape of the rotating shaft portion, but includes polygons that can be positioned at predetermined angles and have different angles or sizes of circumscribed circles.

As in the above configuration, when the cross-sectional shape of the rotating shaft portion and at least a portion of the abutment surface of the rotating shaft portion in the clip portion is configured to be polygonal, it is also possible to make the surfaces other than the polygonal portion flat or curved.
If the entire cross section of the contact surface of the clip part with the rotating shaft part is polygonal, the resistance to rotation may be excessively strong, resulting in a dull clicking sensation. However, if the cross section of a portion of the contact surface of the clip part with the rotating shaft part is polygonal and the surface other than the polygonal part is flat or curved, the resistance can be appropriately reduced, and it is possible to achieve both a clicking sensation and stable holding of the front frame at any flip-up position.
In this configuration, when the clip portion is composed of a bearing portion and a movable piece, the abutment surface of either the bearing portion or the movable piece with the rotating shaft portion can be polygonal, and the abutment surface of the other with the rotating shaft portion can be flat or curved.

Furthermore, in the case of the above configuration, it is also possible to configure the movable piece so that a load is applied to the rotating shaft portion by the elastic force of a torsion spring provided between the movable piece and the bearing portion.
A torsion spring is an elastic element that generates force through torque (torsion moment), so it can generate a large elastic force with a small structure. Because of this characteristic, the elastic element can be placed even in a small area between the movable piece and the bearing part, and the movable piece can be pressed against the rotating shaft to provide an appropriate clamping force. Therefore, the clip part can be constructed without increasing its size.

In the present invention, a rotating shaft is provided on either the connecting member or the front frame of the eyeglass frame, and a clip provided on the other can be detachably attached to the rotating shaft. This allows one to select and wear any one of a number of front frames with different lenses, and if the front frame is not needed for an extended period of time, it can be removed from the eyeglass frame as appropriate. In other words, the present invention has the effect of allowing a front frame with any lens attached to be detachably fixed to the eyeglass frame.

The clip section can rotate and flip up the front frame while applying a clamping force to the rotating shaft section, and the clamping force of the clip section can hold the front frame at any flip-up position. This allows a single structure to be used to fix the clip section to the rotating shaft section and to flip up the front frame and hold it at any position, making the structure for flipping up and attaching/detaching simple and small. In other words, the present invention has the effect of preventing unsightly appearance without the clip section being noticeable, and also reducing the number of parts, allowing for inexpensive manufacturing.

1A and 1B are three-view diagrams illustrating the detachable flip-up eyeglasses of the present invention. 3A and 3B are a partial plan view and an enlarged end view showing a connecting portion and a rotating shaft portion of the present invention. 1A to 1C are three views showing a clip portion of the present invention. FIG. 11 is an explanatory diagram of the case where the front frame of the present invention is flipped up. 10A to 10C are three-view diagrams illustrating a front frame according to a first modified example of the present invention. FIG. 11 is a side view showing a clip portion according to Modification 1 of the present invention. FIG. 11 is an explanatory diagram of a case where a front frame of the first modified example of the present invention is flipped up. 13 is a side view showing a clip portion and a rotating shaft portion according to Modification 2 of the present invention. FIG. FIG. 11 is a side view showing a clip portion and a rotating shaft portion according to a third modified example of the present invention. FIG. 11 is a three-view diagram showing detachable flip-up eyeglasses according to a fourth modified example of the present invention. 1A and 1B are an exploded perspective view and a side view showing a conventional example of Patent Document 1. 1A and 1B are an exploded perspective view and a side view showing a conventional example of Patent Document 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
As shown in FIG. 1, detachable flip-up eyeglasses 100 of the present invention include an eyeglass frame 1 and a front frame 2 that is separate from the eyeglass frame 1 and to which lenses are attached.
The eyeglass frame 1 includes left and right temples 11, a pair of end pieces 12 that rotatably connect the temples 11, and a brow bar 13 that is a connecting member that connects the end pieces 12. In the embodiment shown in Fig. 1, the end pieces 12 are integral with the brow bar 13, and the ends of the brow bar 13 form the end pieces 12.
A pair of nose pads 14 are provided in the center of the brow bar 13. The eyeglass frame 1 does not have lenses and is intended to be worn solely on the face and serves as a base for mounting the front frame 2.

As shown in FIG. 2, the brow bar 13 of the eyeglass frame 1 has a rotating shaft 15 in the middle. The rotating shaft 15 is a hexagonal column shape with a hexagonal cross section that is horizontally arranged in the left-right direction when viewed from the front, and the clip part 3 of the front frame 2 described below is attached to the rotating shaft 15. There are no restrictions on the material of the rotating shaft 15 as long as it has sufficient elasticity and surface hardness so that it does not deform under the clamping force of the clip part 3, but from the viewpoint of manufacturing costs, it is preferable that the rotating shaft 15 is made of resin.

1 again, the front frame 1 includes a clip portion 3 for clamping and fixing the rotating shaft portion 15, a lens fixing portion 21 formed integrally with the clip portion 3, and lenses 22, 22 fixed to the lens fixing portion 21. In the form shown in Fig. 1, the lens fixing portion 21 fixes the upper half of the lens 22 and suspends the lower half of the lens 22 by a nylon string, forming a so-called half-rim.
The lenses 22 can be various lenses such as a lens for vision correction, a lens for sunglasses, a magnifying lens, or the like.

As shown in Fig. 3, the clip part 3 has a gap 31 for receiving the rotating shaft part 15. Fig. 3 is a three-sided view of the clip part 3 seen from the wearer side. The size of the gap 31 is set to be slightly smaller than the rotating shaft part 15. Also, a notch 32 is provided in a part of the gap 31.
When the rotating shaft portion 15 is pressed against this cutout portion 32, the cutout portion 32 expands greatly and the rotating shaft portion 15 is inserted into the gap portion 31. When the rotating shaft portion 15 is inserted into the expanded gap portion 31, the cutout portion 32 returns to its original shape due to its elastic force.
As described above, the size of the gap 31 is slightly smaller than the rotating shaft portion 15, so that in the inserted state, the clip portion 3 is elastically deformed and the gap 31 is slightly expanded. In other words, the clip portion 3 is bent by the difference between the original size of the gap 31 and the size of the rotating shaft portion 15, and the gap 31 is maintained in a slightly expanded state, so that an elastic force according to the amount of bending acts on the rotating shaft portion 15 as a clamping force.

In this way, since the clip portion 3 continues to apply a clamping force to the rotating shaft portion 15, the front frame 2 is stably held relative to the eyeglass frame 1 without rattling.
In the embodiment shown in FIG. 1, since clip portion 3 needs to elastically deform to apply a clamping force to rotating shaft portion 15, clip portion 3 is preferably made of a material having appropriate elasticity, and from the viewpoint of manufacturing costs, it is more preferable that clip portion 3 be made of resin.

Next, the case where the front frame 2 is flipped up will be described with reference to FIG.
When the lenses 22 of the front frame 2 are attached in front of the wearer's eyes and are to be raised to a position where they do not cover the wearer's eyes, the lower sides of the lenses 22 are operated to move forward and upward. Then, the clip part 3 rotates around the rotation shaft part 15 as a central axis while the eyeglass frame 1 remains attached.

At this time, as shown in Figures 4(a) and (b), in cross-sectional view, the straight line portion of the hexagon of the gap portion 31 slides against any corner of the hexagon of the rotating shaft portion 15. At the same time, the gap portion 31 expands by the difference between the circumscribing circle and the inscribing circle of the hexagon, and the clamping force increases according to the amount of deflection.

When the clip part 3 rotates by the inner angle of the hexagon (in this case, about 60 degrees), as shown in FIG. 4(c), the hexagon in the cross section of the gap part 31 and the hexagon in the cross section of the rotating shaft part 15 are misaligned, and adjacent corners are in the same position. During rotation, it is necessary to gradually increase the force until the center of the straight part of the hexagon of the gap part 31 overcomes (passes over) the corner of the hexagon of the rotating shaft part 15, but after it overcomes, the gap part 31 tries to return to its original opening, so that it rotates as if it is sucked to a position where the corners of the hexagon are in the same position without applying force. This feeling is called a clicking sensation, and it is easy for the wearer to feel that it has been positioned.

When positioned at approximately 60 degrees, as described above, the clip portion 3 bends by the difference between the original size of the gap 31 and the size of the rotating shaft portion 15, maintaining the gap 31 in a slightly expanded state, so that the clamping force keeps the front frame 2 stably held in the raised position.

After the above operation, if the front frame 2 is again operated to flip up, the same action causes the front frame 2 to flip up a further 60 degrees with a clicking sensation, and it is once again stably fixed in the flipped up position.
On the other hand, if, after the above operation, the lower edges of the lenses 22/22 are moved backward and downward in the opposite direction, the front frame 2 will be lowered by about 60 degrees with a clicking sensation, due to the same action as when it is flipped upward, and the lenses 22/22 will be stably held in a position directly in front of the eyes.

As described above, in the configurations shown in Figs. 1 to 4, the clip 3 itself elastically deforms to apply a clamping force to the rotating shaft 15. Therefore, the front frame 2 can be rotated and flipped up while applying a clamping force, and the clamping force of the clip portion 3 can hold the front frame 2 in a flipped-up position at intervals of approximately 60 degrees.

『Variation 1』
Next, a front frame 2 according to a modified example of the present invention will be described with reference to Figures 5 to 7. In the following description, the same parts will be designated by the same reference numerals, and duplicated description will be omitted.

As shown in Figure 5, this modified example is a pair of sunglasses with highly curved, integrated lenses 22 attached to the front frame 2. The lens fixing part 21 is formed integrally with the clip part 3, and is configured to fix only the center of the upper edge of the lens 22, not the rim shape.

As shown in FIG. 6, the clip part 3 of this modified example is composed of a bearing part 33 formed integrally with the lens fixing part 21, a movable piece 34 arranged to face the bearing part 33, a torsion spring 35 arranged between the bearing part 33 and the movable piece 34, and a fixing pin 36 through which the coil part of the torsion spring 35 is inserted to fix the bearing part 33 and the movable piece 34. The fixing pin 36 may be formed integrally with the bearing part 33 or the movable piece 34, or may be formed as a separate rod.

The bearing portion 33 of the clip portion 3 has a cross section of the abutment surface 331 (i.e., the surface that becomes part of the bearing) with the rotating shaft portion 15 of the eyeglass frame 1 that is hexagonal in shape to match the cross section of the rotating shaft portion 15. On the other hand, the movable piece 34 of the clip portion 3 has a cross section of the abutment surface 341 (i.e., the surface that becomes part of the bearing) with the rotating shaft portion 15 of the eyeglass frame 1 that is a slightly curved surface.

When the clip portion 3 is attached to the rotating shaft portion 15, the torsion spring 35 disposed below the movable piece 34 is in a slightly deformed state. This causes an elastic force to act to push down the contact surface 341 of the movable piece 34 with the rotating shaft portion 15. In other words, the torsion spring 35 of the movable piece 4 acts to press the contact surface 341 against the rotating shaft portion 15, and the rotating shaft portion 15 is sandwiched between the contact surface 341 of the movable piece 34 and the contact surface 331 of the bearing portion 33.

When the operation surface 342 of the movable piece 34 is pressed while the clip part 3 is attached to the rotating shaft part 15, the fixing pin 36 becomes the rotating shaft and the abutment surface 341 rises. By pulling out the rotating shaft part 15 from the gap created by this, the front frame 2 can be removed from the eyeglass frame 1.
Conversely, when the front frame 2 is removed, by inserting the rotating shaft portion 15 into the gap created by pressing the operating surface 342 of the movable piece 34, the rotating shaft portion 15 is stored in the gap between the abutment surface 331 of the bearing portion 33 and the abutment surface 341 of the movable piece 34, and the front frame 2 can be attached to the eyeglass frame 1.

Next, the case where the front frame 2 is flipped up will be described with reference to FIG.
First, when the lenses 22 of the front frame 2 are attached in front of the wearer's eyes and are to be raised to a position where they do not cover the wearer's eyes, the lower edge of the lenses 22 is operated so as to move forward and upward. Then, the clip part 3 rotates around the rotation shaft part 15 as a central axis while the eyeglass frame 1 is still attached.

At this time, as shown in Figures 7(a) and (b), in cross section, the straight line portions of the hexagon of the abutment surface 331 of the bearing portion 33 and the abutment surface 341 of the movable piece 34 slide against any corner of the hexagon of the rotating shaft portion 15. At the same time, the abutment surface 341 of the movable piece 34 rises upward by an amount equal to the difference between the circumscribing circle and the inscribing circle of the hexagon, and the clamping force increases according to the amount of deformation of the torsion spring 35 that occurs at that time.

When the clip part 4 rotates by the interior angle of the hexagon (in this case, about 60 degrees), as shown in FIG. 7(c), the hexagon of the abutment surface 341 of the bearing part 33 and the hexagon of the cross section of the rotating shaft part 15 are misaligned, and adjacent corners are in the same position. During rotation, it is necessary to gradually increase the force until the center of the straight part of the hexagon of the abutment surface 331 of the bearing part 33 overcomes (passes over) the corner of the hexagon of the rotating shaft part 15, but after it overcomes, the abutment surface 341 of the movable piece 34 tries to return to its original position due to the action of the torsion spring 35, so it rotates as if it is attracted to the position where the corners of the hexagon are in the same position without the application of force.

As mentioned above, in this modified example, the contact surface 341 of the movable piece 34 is curved. If the entire contact surface with the rotating shaft portion 15 is hexagonal, it will fit securely with the rotating shaft portion 15, and the front frame 2 can be held more stably. However, when rotating, there are more sliding points between the corners of the hexagon and the straight parts, so there is a strong sense of resistance to rotation, and when the front frame 2 is flipped up, the eyeglass frame 1 may also float up and become easily removed from the face.

In this modified example, the contact surface 331 of the bearing portion 33 is hexagonal to match the cross-sectional shape of the rotating shaft portion 15, while the contact surface 341 of the movable piece 34 is curved or flat. This reduces the number of sliding points between the corners of the hexagon and the straight portions, and appropriately reduces the resistance to rotation, preventing the eyeglass frame 1 from floating up and falling off the face when the front frame 2 is flipped up.

As described above, in this modified example, the torsion spring 35 disposed below the movable piece 34 elastically deforms, causing the contact surface 341 of the movable piece 34 to apply a clamping force to the rotating shaft portion 15. Therefore, the front frame 2 can be rotated and flipped up while applying the clamping force, and the clamping force of the clip portion 3 can hold the front frame 2 in a flipped-up position at intervals of approximately 60 degrees.

In addition, by using a torsion spring 35 to generate elastic force, the coil portion of the torsion spring 35 can be arranged coaxially with the fixing pin 36, and a large torsional moment can be generated with a small amount of deformation. This allows the components to be arranged densely in a small area, and an appropriate clamping force can be applied. This allows the clip portion 3 to be configured without being large, expanding the scope of design innovation.

『Variation 2』
Next, a clip portion 3 and a rotating shaft portion 15 according to another modified example of the present invention will be described with reference to FIG.
This modified example differs from the embodiment in FIG. 6 in that the cross-sectional shape of the rotating shaft portion 15 is rectangular, and the contact surface 331 of the bearing portion 33 in the clip portion 3 also has a corresponding rectangular shape.
Further, the contact surface 341 of the movable piece 34 is a flat surface.

By making the cross-sectional shape of the rotating shaft portion 15 rectangular, the internal angle is approximately 90 degrees, so the lens 22 of the front frame 2 can be flipped up in one operation from a position in front of the wearer's eyes to a position where it does not cover the wearer's eyes.

『Variation 3』
Next, a clip portion 3 and a rotating shaft portion 15 according to another modified example of the present invention will be described with reference to FIG.
This modified example differs from the form shown in Figure 6 in that the cross-sectional shape of the rotating shaft portion 15 is circular, and the abutment surface 331 of the bearing portion 33 in the clip portion 3 and the abutment surface 341 of the movable piece 34 are also correspondingly circular.

By making the cross-sectional shape of the rotating shaft portion 15 circular, there are no corners that would cause a clicking sensation, and the front frame 2 can be held in the raised position at any desired position. Even in this form, the abutment surface 341 of the movable piece 34 can rotate and raise the front frame 2 while applying a clamping force by the torsion spring 35, so the clamping force of the clip portion 3 can hold the front frame 2 in the raised position at any desired position.

『Variation 4』
Next, detachable flip-up eyeglasses 101 according to another modified example of the present invention will be described with reference to FIG.
10, in this modified example, lenses 17, 17 are attached to rim portion 16, which is a connecting member of eyeglass frame 1. These lenses 17, 17 are vision corrective lenses for correcting myopia and farsightedness, and the wearer views objects through these lenses 17, 17 in daily life.

1, the clip portion 3 is provided on the eyeglass frame 1 side, while the rotation shaft portion 23 is provided on the front frame 2. Even with this configuration, the clip portion 3 may have the configuration shown in FIG. 3, or the configurations shown in FIG. 6, FIG. 8, and FIG. 9.
In this way, by providing the clip portion 3 on the eyeglass frame 1 side, the structure of the front frame 2 can be further simplified, thereby improving portability when carrying multiple front frames 2, 2... with different lens types.

The present invention is not limited to the above embodiments. For example, the bearing portion 33 and the movable piece 34 in the clip portion 3 may be reversed upside down, or the structure for applying elastic force may be configured to interpose a coil spring or other elastic body.
In addition, the cross-sectional shape of the rotating shaft portions 15 and 23 may be configured so that a clicking sensation is generated only at a specified angle, such as a polygon containing a mixture of different angles rather than a regular polygon, or a shape that has a corner on part of a circle (a so-called teardrop shape).

100,101 Detachable flip-up glasses 1 Glasses frame
11. Temple
12 Chibe
13 Blow Bar
14 Nose pad
15 Rotating shaft
16 Rim section
17 Lens 2 Front Frame
21 Lens fixing part
22 Lens
23 Rotating shaft part 3 Clip part
31 Gap
32 Cutout
33 Bearing
331 Contact surface
34 Movable Part
341 Contact surface
342 Operation Surface
35 Torsion spring
36 Fixing pin

Claims (6)

In a detachable flip-up eyeglasses, a lens is attached to an eyeglass frame having at least left and right temples, a pair of end pieces connecting the temples rotatably, and a connecting member connecting the end pieces, and a front frame that is separate from the eyeglass frame can be detached,
The connecting member is provided with a rotation shaft portion,
The front frame is provided with a clip portion that detachably holds the rotation shaft portion,
The clip portion can rotate and lift up the front frame while applying a clamping force to the rotation shaft portion,
The detachable flip-up eyeglasses are characterized in that the front frame can be held at any flip-up position by the clamping force of the clip portion. In a detachable flip-up eyeglasses, a lens is attached to an eyeglass frame having at least left and right temples, a pair of end pieces connecting the temples rotatably, and a connecting member connecting the end pieces, and a front frame that is separate from the eyeglass frame can be detached,
The front frame is provided with a rotation shaft portion,
The connecting member is provided with a clip portion that detachably holds the rotating shaft portion,
The clip portion can rotate and lift up the front frame while applying a clamping force to the rotation shaft portion,
The detachable flip-up eyeglasses are characterized in that the front frame can be held at any flip-up position by the clamping force of the clip portion. the clip portion includes a bearing portion that receives the rotating shaft portion and a movable piece that applies a load to the rotating shaft portion,
3. The detachable flip-up eyeglasses according to claim 1, wherein the clip portion can be switched between a clamping state and a non-clamping state with respect to the rotating shaft portion by operating the movable piece. The cross-sectional shape of the rotating shaft portion is polygonal,
3. The detachable flip-up eyeglasses according to claim 1, wherein at least a portion of the contact surface of the clip portion with the rotating shaft portion has a polygonal cross-sectional shape corresponding to the cross-sectional shape of the rotating shaft portion. The removable flip-up eyeglasses according to claim 1 or 2, characterized in that the cross-sectional shape of a portion of the contact surface of the clip part with the rotating shaft part is polygonal, and the surfaces other than the polygonal part are flat or curved. The removable flip-up eyeglasses according to claim 3, characterized in that the movable piece applies a load to the rotating shaft by the elastic force of a torsion spring provided between the movable piece and the bearing part.

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